A cold-hot core box process test sand core scratch tool

Abstract

The application discloses a cold-hot core box process test sand core scratch tool and belongs to the technical field of sand core detection. The application realizes the detection data and data saving of the strength of the sand core body, facilitates data analysis and data tracing, can detect the scratch depth of different parts of the same sand core, timely discovers problems and timely adjusts, eliminates the defective sand core into the castings after casting, and is favorable for improving the yield of the castings and reducing the waste rate, and the measurement precision is high.

Description

Technical Field

[0001] This invention belongs to the field of sand core testing technology, specifically relating to a tool for testing sand core scratches using a hot and cold core box process. Background Technology

[0002] The resin for amine-process cold core boxes has two components: Component I is a special phenolic resin; Component II is polyisocyanate. In actual use, two processes are required: sand mixing and core making. First, the two resin components are evenly coated onto the surface of the sand grains through a sand mixing process. Then, the mixed material is injected into the core box, i.e., the mold, and triethylamine aerosol is blown in, causing the resin film evenly coated on the surface of the sand grains to change from a liquid to a solid state. This establishes bonding bridges between the sand grains, forming strength. Good core sand is the guarantee for producing high-quality sand cores.

[0003] The coating process involves mechanically mixing powdered thermosetting phenolic resin with raw sand and curing it upon heating. Later, it evolved to use thermoplastic phenolic resin with a latent curing agent. Hexamethylenetetramine and lubricants are formulated into coated sand through a specific coating process. When the coated sand is heated, the resin coating the sand grains melts. Under the action of the methylene groups released from the decomposition of hexamethylenetetramine, the molten resin rapidly transforms from a linear structure to a non-melting three-dimensional structure, thus solidifying the coated sand.

[0004] Currently, when using the hot and cold core box process to produce sand cores, on-site technicians and relevant personnel need to conduct sampling inspections of the sand cores and perform strength tests on some of them. Only those that pass the tests can proceed to the next process and final casting. The existing testing method typically involves technicians and relevant personnel using their fingernails to scratch the surface of the sand core: the depth of the scratch indicates the strength of the sand core—a shallow scratch indicates high strength, and vice versa. However, this method cannot be expressed or recorded in data, and it cannot be used for batch testing with fingernails, resulting in low measurement accuracy. Furthermore, when the sand cores enter the casting process and ultimately result in defective or scrapped castings, it is impossible to trace the initial sand core strength records, leading to a high scrap rate.

[0005] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a tool for testing the scratches on sand cores in the hot and cold core box process. Summary of the Invention

[0006] The purpose of this invention is to provide a tool for testing sand core scratches in hot and cold core box processes, so as to solve the above-mentioned problems.

[0007] To achieve the above objectives, an embodiment of the present invention provides a tool for testing the scratches on sand cores in a hot and cold core box process, including a dial indicator assembly, comprising a dial support, a rotating disk assembly, an upper ring and a lower ring, a handle body, a position indicator seat, a spindle disk, a fixed base, and a drill bit.

[0008] A plastic rotating dial is mounted on the upper surface of the dial support base, and the plastic rotating dial is provided with scale values ​​and a pointer. The rotating disk assembly includes a connecting shaft seat and a fixing ring, and a cross-shaped rotating disk is fixedly connected between the connecting shaft seat and the fixing ring. The upper ring and the lower ring are both sequentially sleeved on the connecting shaft seat.

[0009] The handle body includes a sleeve, and the rotating disk assembly is sleeved on the handle body. The inner end face of the handle body matches the outer end faces of the upper and lower rings. A position indicator seat has an indicator groove on one end face, and the position indicator seat is connected to one end face of the handle body. A spindle disk includes an upper disk and a lower disk. A spring abutment rod is fixedly connected to the upper end face of the upper disk, and the spring abutment rod abuts against a spring.

[0010] The fixed base includes a first base and a second base, which are connected to the bottom end face of the handle body. The drill bit includes a threaded connecting post and teeth, and is connected to the spindle disc.

[0011] As a further improvement of the present invention, a plug-in post is fixedly connected to the lower end face of the dial support base, and a side-headed rod is abutted against the lower end face of the plug-in post. A first screw hole is opened on one side end face of the dial support base, and a first internal hexagon headless screw is threaded into the first screw hole.

[0012] As a further improvement of the present invention, the rotating disk assembly is provided with a plug groove that matches the plug post, and the rotating disk assembly is provided with a side tip plug groove that matches the side tip rod within the plug groove. The bottom end face of the rotating disk assembly is connected to a rotating rod, the top end face of the rotating rod is provided with a thread, and the bottom end face of the rotating disk assembly is provided with a fourth screw hole that matches the rotating rod. The fourth screw hole is threadedly connected to the thread.

[0013] As a further improvement of the present invention, the rotating disk assembly is provided with a spring hole, a spring is connected in the spring hole, an indicator mark is provided on one end face of the cross-shaped rotating disk, and a second screw hole matching the first screw hole is provided on one end face of the insertion slot.

[0014] As a further improvement of the present invention, the rotating disk assembly is provided with a plurality of third screw holes, the upper ring is provided with a plurality of fifth screw holes, and the lower ring is provided with a plurality of sixth screw holes. The third screw holes, fifth screw holes and sixth screw holes are all matched, and the third screw holes, fifth screw holes and sixth screw holes are all threadedly connected to a second headless hexagon socket screw.

[0015] As a further improvement of the present invention, a connecting shaft is fixedly connected between the upper plate and the lower plate, a U-shaped groove is provided on one side end face of the upper plate, and an eleventh screw hole is provided on the bottom end face of the lower plate.

[0016] As a further improvement of the present invention, the threaded connecting column is provided with a threaded through hole, and a third bolt is threadedly connected to the threaded through hole. The third bolt passes through the threaded through hole. The connecting shaft is provided with a fixing threaded hole that matches the third bolt in the eleventh screw hole. The threaded connecting column is threadedly connected to the eleventh screw hole.

[0017] As a further improvement of the present invention, a pair of twelfth screw holes are provided on the second base, and a second bolt is threadedly connected to the twelfth screw holes. A ninth screw hole matching the pair of twelfth screw holes is provided on the bottom end face of the handle body.

[0018] As a further improvement of the present invention, a pair of tenth screw holes are provided on one end face of the position indicator seat, and an eighth screw hole matching the pair of tenth screw holes is provided on the sleeve. Both the tenth screw hole and the eighth screw hole are threaded with a first bolt.

[0019] As a further improvement of the present invention, the sleeve is provided with a seventh screw hole that matches the plurality of third screw holes.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This invention enables easy viewing and storage of the strength test data of the sand core body, facilitating data analysis and traceability. It can detect the scratch depth of different parts of the same sand core, allowing for timely detection and adjustment of problems. This prevents defective sand cores from entering the casting process, resulting in defective or scrapped castings. This helps improve the yield of castings, reduce the scrap rate, lower production costs, and provides high measurement accuracy. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a core scratch testing tool for hot and cold core box process according to an embodiment of the present invention;

[0024] Figure 2 This is an exploded view of a tool for testing sand core scratches in a hot and cold core box process according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a pointer percentage indicator component in one embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the rotating disk assembly in one embodiment of the present invention. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the rotating disk assembly in one embodiment of the present invention. Figure 2 ;

[0028] Figure 6 This is a cross-sectional view of a rotating disk assembly according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the spindle disk structure in one embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the drill bit structure in one embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the fixed base in one embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the handle body in one embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the structure of a position indicator seat in one embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram illustrating the usage state of a sand core scratch testing tool for a hot and cold core box process according to an embodiment of the present invention.

[0035] In the diagram: 1. Dial indicator assembly, 101. Side tip rod, 102. First hex headless screw, 103. First screw hole, 104. Plastic rotating dial, 105. Scale value, 106. Pointer, 107. Dial support, 108. Connecting post, 2. Rotating disc assembly, 201. Second screw hole, 202. Connecting slot, 203. Indicator mark, 204. Cross-shaped rotating disc, 205. Connecting shaft seat, 206. Third screw hole, 207. Rotating rod, 208. Spring hole, 209. Side tip rod connecting slot, 210. Fourth screw hole, 211. Thread, 212. Retaining ring, 3. Upper ring, 301. Fifth screw hole, 4. Lower ring, 401. Sixth screw hole, 5. Handle body, 501. Sleeve, 502. Seventh screw hole, 503. Eighth screw hole, 504. Ninth screw hole, 6. Position indicator seat, 601. Indicator groove, 602. Tenth screw hole, 603. First bolt, 7. Spring, 8. Spindle plate, 801. Spring abutment rod, 802. Upper plate, 803. U-shaped groove, 804. Connecting shaft, 805. Lower plate, 806. Eleventh screw hole, 9. Fixed base, 901. First base, 902. Second base, 903. Through hole, 904. Twelfth screw hole, 10. Drill bit, 1001. Threaded connecting post, 1002. Tooth head, 1003. Threaded through hole, 11. Second internal hex headless screw, 12. Second bolt, 13. Third bolt, 14. Sand core body, 15. Table. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0037] In the various illustrations of this invention, for ease of illustration, certain dimensions of structures or parts may be enlarged relative to other structures or parts; therefore, only the basic structure of the subject matter of this invention is used to illustrate the invention.

[0038] Terms indicating relative spatial positions used herein, such as "left", "right", "left side", "right side", etc., are used for the purpose of facilitating description to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms of relative spatial position may be intended to include different orientations of the device in use or operation other than the orientation shown in the figures. For example, if the device shown in the figures is turned over, a unit described as being "on the right" of other units or features will be positioned "on the left" of other units or features. Therefore, the exemplary term "right side" can encompass both the left and right orientations. The device may be oriented by 90-degree rotation or other orientations in other ways, and the spatially related descriptors used herein shall be interpreted accordingly.

[0039] According to an embodiment of the present invention, a scratching tool for a sand core body for hot and cold box process testing is disclosed, with reference to Figures 1-3 , it includes a dial indicator pointer assembly 1. The dial indicator pointer assembly 1 includes a dial support seat 107. A plastic rotating dial 104 is mounted on the upper end face of the dial support seat 107. A scale value 105 and a pointer 106 are arranged on the plastic rotating dial 104, so that when measuring the sand core body 14, measurement data can be easily obtained through the plastic rotating dial 104. The value of the scale value 105 is 0 to 100, and the maximum stroke is 1 mm.

[0040] with reference to Figures 1-3 , the lower end face of the dial support seat 107 is fixedly connected with an inserting column 108. The lower end face of the inserting column 108 abuts against a probe pointed rod 101. An inserting slot 202 matching the inserting column 108 is opened on the end face of the rotating disc assembly 2 that contacts the inserting column 108, and the inserting column 108 is connected in series in the inserting slot 202;

[0041] with reference to Figures 1-6 , the rotating disc assembly 2 is provided with a probe pointed rod inserting slot 209 matching the probe pointed rod 101 in the inserting slot 202, and the probe pointed rod 101 is connected in series on the probe pointed rod inserting slot 209. Specifically, when the dial indicator pointer assembly 1 is connected with the rotating disc assembly 2, by moving the dial indicator pointer assembly 1 downward until the inserting column 108 and the probe pointed rod 101 are respectively connected in series into the inserting slot 202 and the probe pointed rod inserting slot 209 on the rotating disc assembly 2 in sequence, the rotating disc assembly 2 and the dial indicator pointer assembly 1 are closely attached.

[0042] with reference to Figures 1-3As shown, one end face of the dial support seat (107) is provided with a first screw hole (103), the first screw hole (103) is threadedly connected with a first hexagon socket headless set screw (102), and one end face of the inserting groove (202) is provided with a second screw hole (201) matched with the first screw hole (103), so as to realize the fixation and disassembly of the connection between the dial indicator assembly (1) and the rotating disc assembly (2). Specifically, after the dial indicator assembly (1) and the rotating disc assembly (2) are closely fitted, the first screw hole (103) on the dial indicator assembly (1) coincides with the second screw hole (201) on the rotating disc assembly (2), and the first hexagon socket headless set screw (102) is screwed into the first screw hole (103) and the second screw hole (201) through rotation, so as to fix the connection between the dial indicator assembly (1) and the rotating disc assembly (2). When it is necessary to disassemble the connection between the dial indicator assembly (1) and the rotating disc assembly (2), the dial indicator assembly (1) can be removed from the rotating disc assembly (2) by rotating and taking out the first hexagon socket headless set screw (102).

[0043] Referring to Figures 4-6 As shown, the rotating disc assembly (2) comprises a connecting shaft seat (205) and a fixed ring (212), a cross-knurled rotating disc (204) is fixedly connected between the connecting shaft seat (205) and the fixed ring (212), that is, the upper end face of the connecting shaft seat (205) is fixedly connected with the cross-knurled rotating disc (204). The upper end face of the cross-knurled rotating disc (204) is fixedly connected with the fixed ring (212), the diameter of the cross-knurled rotating disc (204) is larger than that of the fixed ring (212) and the connecting shaft seat (205), and the diameter of the fixed ring (212) is larger than that of the connecting shaft seat (205), so that the rotation of the rotating disc assembly (2) can be controlled conveniently by rotating the cross-knurled rotating disc (204).

[0044] Referring to Figures 4-6 As shown, a rotating rod (207) is connected to the bottom end face of the rotating disc assembly (2), and a thread (211) is provided on the top end face of the rotating rod (207). A fourth screw hole (210) matched with the rotating rod (207) is opened on the bottom end face of the rotating disc assembly (2), and the fourth screw hole (210) is threadedly connected with the thread (211), so that the rotating rod (207) is fixed in the fourth screw hole (210), and when the rotating disc assembly (2) rotates, the rotating rod (207) also rotates accordingly. Referring to Figures 4-6 As shown, an indication mark (203) is provided on one end face of the cross-knurled rotating disc (204), which facilitates data recording through the indication mark (203) when testing the strength of the sand core body (14).

[0045] Referring to Figures 4-7As shown, the main shaft disc 8 comprises an upper disc 802 and a lower disc 805, the upper end surface of the upper disc 802 is fixedly connected with a spring abutting rod 801, the spring abutting rod 801 abuts against a spring 7, a spring hole 208 is opened on the rotating disc assembly 2, the spring 7 is connected in the spring hole 208, so that the main shaft disc 8 abuts against the spring 7 through the spring abutting rod 801 and moves up and down in the spring hole 208 on the rotating disc assembly 2. A connecting shaft 804 is fixedly connected between the upper disc 802 and the lower disc 805, a U-shaped groove 803 is opened on one end surface of the upper disc 802, and the U-shaped groove 803 matches the rotating rod 207. The U-shaped groove 803 is clamped to the rotating rod 207, and 807 rotates accordingly when the rotating rod 207 rotates, so that when the rotating disc assembly 2 rotates, the rotating rod 207 on the rotating disc assembly 2 drives the main shaft disc 8 to rotate accordingly.

[0046] Reference Figures 2-6 As shown, both the upper ring 3 and the lower ring 4 are sequentially sleeved on the connecting shaft seat 205, and a plurality of third screw holes 206 are opened on the rotating disc assembly 2. A plurality of fifth screw holes 301 are opened on the upper ring 3, and a plurality of sixth screw holes 401 are opened on the lower ring 4. The third screw holes 206, the fifth screw holes 301 and the sixth screw holes 401 all match each other, and second hexagon socket headless screws 11 are threadedly connected to the third screw holes 206, the fifth screw holes 301 and the sixth screw holes 401, so as to fix the upper ring 3 and the lower ring 4 on the connecting shaft seat 205.

[0047] Specifically, the upper ring 3 is first sleeved on the connecting shaft seat 205, then the lower ring 4 is sleeved on the connecting shaft seat 205 and located on the lower end surface of the upper ring 3, and then a plurality of second hexagon socket headless screws 11 are sequentially rotated and tightened to penetrate through the sixth screw holes 401 and the third screw holes 206, so as to fix the lower ring 4 and the upper ring 3 on the connecting shaft seat 205.

[0048] Reference Figure 10 As shown, the handle main body 5 comprises a sleeve 501, the inner end surface of the handle main body 5 matches the outer end surfaces of the upper ring 3 and the lower ring 4, and the rotating disc assembly 2 is sleeved on the outer end surfaces of the upper ring 3 and the lower ring 4 which are connected in series on the handle main body 5. Seventh screw holes 502 matching with the plurality of third screw holes 206 are opened on the sleeve 501, and second hexagon socket headless screws 11 are threadedly connected to each of the plurality of seventh screw holes 502, so as to realize disassembly and fixation of fixing the handle main body 5 on the rotating disc assembly 2.

[0049] Specifically, when the handle body 5 is sleeved on the rotating disc assembly 2, the seventh screw hole 502 on the handle body 5 coincides with the fifth screw hole 301 on the upper ring 3, and a plurality of second hexagon socket headless screws 11 are taken, screwed and run through the fifth screw hole 301, the seventh screw hole 502 and the third screw hole 206 until the second hexagon socket headless screws 11 are closely attached to the rotating disc assembly 2 without gap, so as to fix the handle body 5 on the rotating disc assembly 2.

[0050] Referring to Figure 11 , an indicating groove 601 is provided on one end face of the position indicating seat 6, which is convenient for matching with the indicating mark 203 when testing the strength of the sand core body 14. The position indicating seat 6 is connected with one end face of the handle body 5, a pair of tenth screw holes 602 are formed on one end face of the position indicating seat 6, and an eighth screw hole 503 matching the pair of tenth screw holes 602 is formed on the sleeve 501. The tenth screw holes 602 and the eighth screw hole 503 are both in threaded connection with first bolts 603, so as to realize the disassembly and fixation of the position indicating seat 6 fixed on one end face of the handle body 5.

[0051] Specifically, when fixing the position indicating seat 6 on the handle body 5, move the position indicating seat 6 until the tenth screw hole 602 on the position indicating seat 6 coincides with the eighth screw hole 503 on the handle body 5, rotate and tighten the first bolt 603 until the position indicating seat 6 is closely attached to the handle body 5, so as to fix the position indicating seat 6 on one end face of the handle body 5.

[0052] Referring to Figures 7-8 , the drill bit 10 comprises a threaded connecting column 1001 and a tooth head 1002, the drill bit 10 is connected with the main shaft disc 8, an eleventh screw hole 806 is provided on the bottom end face of the lower disc 805, and the threaded connecting column 1001 is in threaded connection with the eleventh screw hole 806, so as to fix the drill bit 10 on the bottom end face of the main shaft disc 8,[

[0053] wherein the tooth head 1002 functions to judge the strength of the sand core body 14 in sequence by continuously rotating into the sand core body 14.

[0054] Referring to Figures 7-8 , a threaded through hole 1003 is opened in the threaded connecting column 1001, the threaded through hole 1003 is in threaded connection with a third bolt 13, the third bolt 13 runs through the threaded through hole 1003, a fixing threaded hole matching the third bolt 13 is opened in the connecting shaft 804 located in the eleventh screw hole 806, and the fixing threaded hole is in threaded connection with the third bolt 13, so as to strengthen the fixation of the drill bit 10 on the main shaft disc 8.

[0055] Specifically, after rotating the drill bit 10 until the threaded connection post 1001 on the drill bit 10 is screwed into the eleventh screw hole 806, the third bolt 13 is rotated and tightened until the third bolt 13 penetrates the threaded through hole 1003 and the fixed threaded hole, so that the drill bit 10 is fixed on the spindle disk 8.

[0056] Referring to Figures 2-9 , the fixed base 9 includes a first base 901 and a second base 902, and the diameter of the second base 902 is larger than that of the first base 901. The outer end face of the first base 901 matches the inner wall end face of the bottom wall of the handle body 5, and the first base 901 is connected in series to the bottom end face of the handle body 5.

[0057] Referring to Figures 2-9 , a pair of twelfth screw holes 904 are formed on the second base 902, and the twelfth screw holes 904 are threadedly connected with second bolts 12. Ninth screw holes 504 matching the pair of twelfth screw holes 904 are formed on the bottom end face of the handle body 5, so that the fixed base 9 is fixed on the bottom end face of the handle body 5. Specifically, when the fixed base 9 needs to be fixed on the bottom end face of the handle body 5, the fixed base 9 is moved until the first base 901 is connected in series to the inner wall end face of the sleeve 501, at this time the first base 901 abuts against the bottom end face of the lower disk 805, the upper end face of the second base 902 is closely attached to the bottom end face of the handle body 5, and then the pair of second bolts 12 are rotated and tightened to penetrate the pair of twelfth screw holes 904 and the ninth screw holes 504, so that the fixed base 9 is fixed on the bottom end face of the handle body 5.

[0058] Further, the distance that the tooth head 1002 protrudes from the bottom end face of the second base 902 is 1 mm, that is, when the tooth head 1002 and the second base 902 are pressed onto a plane, the indentation length of the tooth head 1002 is 1 mm.

[0059] The installation steps of the present invention are as follows;

[0060] S1, inserting the insertion post 108 on the dial indicator assembly 1 into the insertion slot 202 on the rotating disk assembly 2, inserting the side pointed rod 101 abutted by the lower end face of the insertion post 108 into the side pointed rod insertion slot 209 on the rotating disk assembly 2, at this time the first screw hole 103 on the dial indicator assembly 1 coincides with the second screw hole 201 on the rotating disk assembly 2, rotating and tightening the first hexagonal socket grub screw 102 into the first screw hole 103 and the second screw hole 201, so as to fix the connection between the dial indicator assembly 1 and the rotating disk assembly 2.

[0061] S2: first sleeve the upper circular ring 3 onto the connecting shaft seat 205, then sleeve the lower circular ring 4 onto the connecting shaft seat 205, where the lower circular ring 4 is located on the lower end face of the upper circular ring 3, and then use a plurality of second socket head cap set screws 11 to sequentially rotate, tighten and penetrate through the sixth screw holes 401 and the third screw holes 206, so as to fix the upper circular ring 3 and the lower circular ring 4 onto the connecting shaft seat 205.

[0062] S3: rotate and tighten the rotating rod 207 into the fourth screw hole 210 through the threads 211, so as to fix the fourth screw hole 210 on the bottom end face of the rotating disc assembly 2, and at this time, the rotating rod 207 protrudes from the bottom end face of the connecting shaft seat 205.

[0063] S4: string the rotating disc assembly 2 into the sleeve 501 of the handle main body 5, at this time, the seventh screw hole 502 on the sleeve 501 coincides with the fifth screw hole 301 on the upper circular ring 3, take a plurality of second socket head cap set screws 11, rotate and tighten them to penetrate through the fifth screw hole 301, the seventh screw hole 502 and the third screw hole 206 until the second socket head cap set screws 11 are closely attached to the rotating disc assembly 2 without gaps, so as to fix the handle main body 5 onto the rotating disc assembly 2.

[0064] S5: place the spring 7 into the spring hole 208.

[0065] S6: threadedly connect the eleventh screw hole 806 on the bottom end face of the spindle disc 8 with the threaded connecting post 1001 on the drill bit 10, then rotate and tighten the second socket head cap set screw 11 until the second socket head cap set screw 11 penetrates through the threaded through hole 1003 and the fixed threaded hole, so as to fix the drill bit 10 onto the spindle disc 8.

[0066] S7: move the drill bit 10 and the spindle disc 8 until the spring abutting rod 801 on the spindle disc 8 abuts against the spring 7, and the U-shaped groove 803 on the spindle disc 8 is clamped to the rotating rod 207.

[0067] S8: move the fixed base 9 until the first base 901 is串接 on the inner wall end face of the sleeve 501, at this time, the first base 901 abuts against the bottom end face of the lower disc 805, the upper end face of the second base 902 is closely attached to the bottom end face of the sleeve 501, then rotate and tighten a pair of second bolts 12 to penetrate through a pair of twelfth screw holes 904 and the ninth screw holes 504, so as to fix the fixed base 9 onto the bottom end face of the handle main body 5. The connection between the drill bit 10, the spindle disc 8 and the rotating disc assembly 2 is fixed, the drill bit 10 and the spindle disc 8 are fixed on the handle main body 5, and at this time, the tooth head 1002 protrudes from the bottom end face of the handle main body 5.

[0068] Refer Figure 12 as shown, the steps for detecting the strength of the sand core body 14 of the present invention are as follows;

[0069] S01. The operator holds the handle body 5 and rotates the plastic rotating dial 104 until the scale 0 on the scale value 105 is aligned with the pointer 106, that is, it is returned to zero.

[0070] S02, rotate the cross-shaped rotating disk 204 on the rotating disk assembly 2 until the indicator mark 203 is aligned with the indicator groove 601 on the position indicator seat 6.

[0071] S03. The operator holds the handle body 5 with their left hand, with the plastic rotating dial 104 facing vertically upwards and the fixed base 9 facing vertically downwards. The sand core body 14 is placed on a flat surface on the table 15. Find a horizontal plane on the sand core body 14 and press the fixed base 9 onto the plane of the sand core body 14. At this time, align the value 0 on the scale 105 with the pointer 106. The operator's left hand presses firmly without letting go.

[0072] S04. At this time, the operator rotates the cross-patterned rotating disk 204 on the rotating disk assembly 2 multiple times with his right hand. At this time, the tooth 1002 on the drill bit 10 continuously penetrates into the sand core body 14 from the surface of the sand core body 14. The cross-patterned rotating disk 204 stops rotating after rotating to the specified number of times.

[0073] When the cross-shaped rotating disk 204 is rotated, the indicator mark 203 on the rotating disk assembly 2 and the indicator groove 601 on the position indicator seat 6 are aligned again to form a complete circle, and so on.

[0074] S05. Check the value displayed on the plastic rotating dial 104. The value obtained is the depth to which the tooth 1002 of the drill bit 10 goes down.

[0075] The smaller the value displayed on the plastic rotating dial 104, the higher the strength of the sand core body 14; the larger the value, the lower the strength of the sand core body 14.

[0076] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0077] 1. Coated sand process: It solves the problem of conveniently viewing and storing the strength test data of the sand core body 14, which facilitates data analysis and traceability; it can detect the scratch depth of different parts of the same sand core body 14, which facilitates the analysis of whether the mold temperature is appropriate;

[0078] Timely inspection of the vent plug for blockages can lead to localized loosening of the sand core body 14, resulting in incomplete casting and reduced strength. This reduces the occurrence of batches of defective sand core bodies 14, thus minimizing environmental pollution from waste. It also prevents defective sand core bodies 14 from entering the casting process, thus improving the yield rate of castings, reducing the scrap rate, and lowering production costs for producers.

[0079] 2. Amine-based cold core box process: The strength changes of the sand core body 14 can be monitored in real time, and the strength changes from initial strength / 1H to 24H can be detected, which is convenient for data analysis and traceability. The strength of different parts of the same sand core body 14 can be detected, which is convenient for analyzing whether the sand injection pressure of the mold is appropriate.

[0080] Check for areas where triethylamine was over-blown or under-blown, and promptly inspect the vent plugs for blockages that could cause localized loosening of the sand core body 14, leading to incomplete injection and reduced strength. Also, check the accuracy of resin addition. Due to the moisture-sensitive nature of cold-box resin, high workshop humidity can cause a decrease in the strength of the sand core body 14. Test the strength data of the sand core body 14 after 24 hours of storage to identify and adjust problems promptly, reducing the environmental pollution caused by discarded batches of defective sand core bodies 14. Preventing defective sand core bodies 14 from entering the casting process results in defective or scrapped castings, improving the yield and reducing the scrap rate. This reduces production costs for manufacturers.

[0081] As can be seen from the above technical solutions, the present invention has the following beneficial effects: The present invention enables easy viewing and storage of the strength test data of the sand core body, facilitates data analysis and traceability, can detect the scratch depth of different parts of the same sand core body, can promptly identify problems and make timely adjustments, and can prevent defective or scrap products from appearing in the casting after defective sand core bodies enter the casting process. This is conducive to improving the yield of castings, reducing the scrap rate, reducing production costs, and providing high measurement accuracy.

[0082] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0083] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A tool for testing sand core scratches in hot and cold core box processes, characterized in that, include: A pointer dial indicator assembly includes a dial support base, on the upper surface of which a plastic rotating dial is mounted, and the plastic rotating dial is provided with scale values ​​and a pointer; The rotating disk assembly includes a connecting shaft seat and a retaining ring, with a cross-shaped rotating disk fixedly connected between the connecting shaft seat and the retaining ring; An upper ring and a lower ring, both of which are sequentially sleeved on the connecting shaft seat; The handle body includes a sleeve, the rotating disk assembly is sleeved on the handle body, and the inner end face of the handle body matches the outer end faces of the upper and lower rings. A position indicator seat has an indicator groove on one end face, and the position indicator seat is connected to one end face of the handle body; The spindle disk includes an upper disk and a lower disk. A spring abutment rod is fixedly connected to the upper end face of the upper disk, and the spring abutment rod abuts against a spring. A fixed base, including a first base and a second base, wherein the fixed base is connected to the bottom end face of the handle body; A drill bit, comprising a threaded connecting post and teeth, the drill bit being connected to a spindle disk; The lower end face of the dial support is fixedly connected to a plug post, the lower end face of the plug post abuts against a side-headed rod, and a first screw hole is opened on one side end face of the dial support, and a first internal hex headless screw is threaded into the first screw hole. The rotating disk assembly has a plug slot that matches the plug post. The rotating disk assembly has a side tip plug slot that matches the side tip rod located in the plug slot. The bottom end face of the rotating disk assembly is connected to a rotating rod. The top end face of the rotating rod is threaded. The bottom end face of the rotating disk assembly has a fourth screw hole that matches the rotating rod. The fourth screw hole is threaded. The rotating disk assembly has a spring hole, and a spring is connected inside the spring hole. An indicator mark is provided on one end face of the cross-shaped rotating disk, and a second screw hole matching the first screw hole is provided on one end face of the insertion slot. A connecting shaft is fixedly connected between the upper plate and the lower plate. A U-shaped groove is provided on one side end face of the upper plate, and an eleventh screw hole is provided on the bottom end face of the lower plate. The threaded connecting column has a threaded through hole, and a third bolt is threadedly connected to the threaded through hole. The third bolt passes through the threaded through hole. The connecting shaft has a fixing threaded hole that matches the third bolt in the eleventh screw hole. The threaded connecting column is threadedly connected to the eleventh screw hole.

2. The tool for testing sand core scratches in hot and cold core box processes according to claim 1, characterized in that, The rotating disk assembly has multiple third screw holes, the upper ring has multiple fifth screw holes, and the lower ring has multiple sixth screw holes. The third, fifth, and sixth screw holes are all matched, and each of the third, fifth, and sixth screw holes is threaded with a second headless hexagon socket screw.

3. The tool for testing sand core scratches in hot and cold core box processes according to claim 1, characterized in that, The second base has a pair of twelfth screw holes, and a second bolt is threaded into the twelfth screw holes. The bottom end face of the handle body has a ninth screw hole that matches the pair of twelfth screw holes.

4. The tool for testing sand core scratches in hot and cold core box processes according to claim 1, characterized in that, The position indicator seat has a pair of tenth screw holes on one end face, and the sleeve has an eighth screw hole that matches the pair of tenth screw holes. Both the tenth screw holes and the eighth screw hole are threaded with a first bolt.

5. The tool for testing sand core scratches in hot and cold core box processes according to claim 1, characterized in that, The sleeve has a seventh screw hole that matches the multiple third screw holes.

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