A testing device for manufacturing a drilling roller cutter

Abstract

The present application relates to the technical field of drilling roller cutter, especially to a testing device for manufacturing drilling roller cutter, comprising a numerical control machine tool, wherein the numerical control machine tool comprises a tooling assembly and a three-jaw chuck; the three-jaw chuck is used for clamping and rotating the roller cutter drill bit; the tooling assembly comprises a tooling seat, and a threaded turning tool is arranged on the end face of the tooling seat, which is used for turning out the internal thread at the front end connecting portion of the roller cutter drill bit; a threaded testing ring is fixedly sleeved on the outer side of the tooling seat, and the threaded testing ring is matched with the threaded connecting portion of the roller cutter drill bit; the tooling assembly further comprises a linear reciprocating mechanism and a displacement sensor, the testing top rod of the displacement sensor is in contact with one end face of the threaded testing ring, and the linear reciprocating mechanism is used for driving the displacement sensor to reciprocate between the threaded testing ring and the end face of the roller cutter drill bit, so that the integrated functions of thread processing and testing are realized conveniently and efficiently.

Description

Technical Field

[0001] This invention relates to the technical field of drilling cutters, and more particularly to a testing device for manufacturing drilling cutters. Background Technology

[0002] Cutting rollers are one of the most commonly used types of drill bits in the fields of oil, natural gas, geothermal, mineral exploration, and water well drilling. Because the drill bit itself needs to rotate continuously at high speed during use, the precision and reliability of the bearing sealing system in the cutting roller manufacturing process are key factors that determine the performance and life of the drill bit.

[0003] In the precision turning process of hobbing drill bits, threaded joints need to be machined. Typically, the operator lifts the drill bit and installs it on the lathe chuck. Using an alloy cutting tool, the operator probes into the drill bit and machines the connecting threads at the connection position at the front end of the drill bit body. This is for the later installation of the protective cover for the bearing system. To ensure the positional accuracy and reliability of the subsequent bearing system structure, after the thread machining is completed, the operator needs to screw the test protective cover into the machined threaded interface to test the thread accuracy. Whether the protective cover is screwed in or not, and whether it is on the same plane as the front end face of the drill bit after screwing in, determines whether the machining accuracy of the connecting thread meets the standard.

[0004] However, the drill bit body that has just finished threading will generate a lot of heat, especially at the front threaded connection. At this time, it would be dangerous for workers to screw the protective cover in for testing, as it could easily cause burns. Furthermore, it would be difficult to detect minute dimensional deviations with the naked eye. In this case, the drill bit body needs to be removed from the machine tool and then tested accurately using professional measuring tools. However, the drill bit body itself is quite heavy, and it would undoubtedly waste processing time and reduce work efficiency if workers lifted it up, removed it, and placed it on the testing fixture.

[0005] Therefore, it is necessary to provide a testing device for drilling cutter manufacturing that can integrate thread processing and testing. Summary of the Invention

[0006] The purpose of this invention is to provide a testing device for manufacturing drilling cutters, so as to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a testing device for manufacturing drilling cutters, comprising a CNC machine tool.

[0008] The CNC machine tool includes a tooling assembly and a three-jaw chuck;

[0009] The three-jaw chuck is used to clamp the hob drill bit and rotate it.

[0010] The tooling assembly includes a tooling base, and a thread cutting tool is provided on the end face of the tooling base. The thread cutting tool is used to cut internal threads at the front end connection of the hobbing drill bit.

[0011] A threaded test ring is fixedly sleeved on the outer side of the tooling base, and the threaded test ring is adapted to the threaded connection of the hobbing drill bit.

[0012] The tooling assembly also includes a linear reciprocating mechanism and a displacement sensor. The test push rod of the displacement sensor is in contact with one end face of the thread test ring. The linear reciprocating mechanism is used to drive the displacement sensor to move back and forth between the thread test ring and the end face of the hobbing drill bit.

[0013] In one embodiment, a fixed cylindrical base is provided on the middle side of the tooling assembly. One end of the fixed cylindrical base is connected to the tooling base. A transverse groove for accommodating a displacement sensor is opened at the upper end of the fixed cylindrical base. A pair of limiting blocks are fixedly connected to both ends of the transverse groove. Limiting transverse holes are opened on the inner side of the limiting blocks. Ring sleeves are provided at both ends of the displacement sensor housing, and the ring sleeves are adapted to the limiting transverse holes.

[0014] In one embodiment, the fixed cylinder base includes a pair of retaining plates and a central base. A central shaft is rotatably connected between the pair of retaining plates. A pair of square top blocks are fixedly connected to the middle side of the central shaft. The four corners of the square top blocks are rounded. A cylindrical hole for accommodating the square top blocks is provided on the middle side of the central base.

[0015] In one embodiment, the upper end of the cylindrical hole is connected to the transverse groove, the upper end of the square top block is in contact with a roller, a central block is rotatably connected between a pair of rollers, a top plate is fixedly connected to the upper end of the central block, and guide rods are fixedly connected to both ends of the top plate. A guide hole is opened on the lower side of the transverse groove of the snap-fit ​​plate, the guide hole is adapted to the guide rod, and a tension spring is connected between the guide hole and the guide rod.

[0016] In one embodiment, the test push rod of the displacement sensor is provided with a ball bearing.

[0017] In one embodiment, one end of the fixed cylinder seat is rotatably connected to the tooling seat, the inner side of the snap-fit ​​plate is provided with an adaptive circular groove, one end of the tooling seat is fixedly connected to a bearing disk, the outer side of the bearing disk is provided with rollers, the bearing disk is adapted to the adaptive circular groove, and one end of the central shaft passes through the bearing disk and is fixedly connected to the tooling seat.

[0018] In one embodiment, a bearing disk two is similarly provided on one side of the other side of the snap-fit ​​disc. A sliding seat is fixedly connected to one end of the bearing disk two. Limiting grooves are opened on the four sides of the sliding seat. One end of the sliding seat is slidably fitted with a limiting cavity. The inner side of the limiting cavity is adapted to the sliding seat. The other end of the central shaft passes through the bearing disk two and is fixedly connected to the sliding seat.

[0019] In one embodiment, an extension arc plate is fixedly connected to the lower end of the limiting cavity, a guide rail recess is provided on the inner side of the extension arc plate, the upper side of the extension arc plate is slidably engaged with the fixed cylinder seat, a guide rail protrusion is provided on the lower side of the fixed cylinder seat, the guide rail protrusion is adapted to the guide rail recess, a guide rod is fixedly connected to one end of the fixed cylinder seat, a guide groove is provided at one end of the limiting cavity, and the guide rod is slidably engaged with the guide groove.

[0020] In one embodiment, the lower end of the extended arc plate and the limiting cavity is fixedly connected to an X-axis sliding base.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention uses a tooling seat to move the thread test ring to be in contact with the thread of the hobbing drill bit. Then the tooling seat restricts the thread test ring from rotating. Similarly, the hobbing drill bit is driven to rotate relative to the thread test ring by a three-jaw chuck, so that the thread test ring can be screwed into the hobbing drill bit along its thread pattern.

[0022] After the thread test ring has been screwed in, the displacement sensor is driven by the linear reciprocating mechanism to move back and forth, so that the test push rod moves back and forth between the thread test ring and the front end face of the hob drill bit. The displacement sensor feeds back data. If the distance difference between the two planes is within the standard value, it means that the thread machining accuracy is qualified; otherwise, it is unqualified. The test of the hob drill bit is then completed.

[0023] The thread cutting tool and thread testing ring are both integrated in the tooling base. Using the same drive system of the CNC machine tool, the hobbing drill bit is rotated through the three-jaw chuck, thereby performing thread processing and thread testing in succession. This achieves an efficient and convenient integrated function of thread processing and thread testing, improving the accuracy and safety of testing. Attached Figure Description

[0024] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0025] In the attached diagram:

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a three-dimensional schematic diagram of the hobbing drill bit of the present invention;

[0028] Figure 3 This is a three-dimensional schematic diagram of the tooling assembly of the present invention;

[0029] Figure 4 This is a partial cross-sectional schematic diagram of the fixed cylinder seat of the present invention;

[0030] Figure 5 This is a three-dimensional schematic diagram of the displacement sensor of the present invention;

[0031] Figure 6 This is an exploded perspective view of the fixed cylinder base of the present invention;

[0032] Figure 7 This is a cross-sectional schematic diagram of the tooling assembly of the present invention;

[0033] Figure 8 yes Figure 7 A magnified view of a portion of region A;

[0034] Figure 9 This is a three-dimensional schematic diagram of the sliding seat of the present invention;

[0035] Figure 10 This is a three-dimensional schematic diagram of the extended arc plate of the present invention;

[0036] In the diagram: 1. Tooling assembly; 101. Tooling base; 102. Adaptive circular groove; 103. Bearing disc one; 104. Bearing disc two; 105. Sliding seat; 106. Limiting cavity; 107. Extension arc plate; 108. Guide rod; 109. Sliding base;

[0037] 2. Thread test ring;

[0038] 3. Displacement sensor; 301. Limit block; 302. Ball bearing;

[0039] 4. Fixed cylinder base; 401. Clip plate; 402. Center seat; 403. Center shaft; 404. Square top block; 405. Roller; 406. Center block; 407. Top plate; 408. Guide rod; 409. Guide hole;

[0040] 5. Three-jaw chuck;

[0041] 6. Hob drill bit;

[0042] 7. Threading tool. Detailed Implementation

[0043] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0044] Please see Figure 1-10 The present invention provides a technical solution: a testing device for manufacturing drilling cutters, comprising a CNC machine tool.

[0045] The CNC machine tool includes a tooling assembly 1 and a three-jaw chuck 5;

[0046] The three-jaw chuck 5 is used to clamp the hobbing drill bit 6 and rotate it;

[0047] The tooling assembly 1 includes a tooling base 101, and a thread cutting tool 7 is provided on the end face of the tooling base 101. The thread cutting tool 7 is used to cut internal threads at the front end connection of the hob drill bit 6.

[0048] A threaded test ring 2 is fixedly sleeved on the outer side of the tooling base 101, and the threaded test ring 2 is adapted to the threaded connection of the hobbing drill bit 6.

[0049] The tooling assembly 1 also includes a linear reciprocating mechanism and a displacement sensor 3. The test push rod of the displacement sensor 3 is in contact with one end face of the thread test ring 2. The linear reciprocating mechanism is used to drive the displacement sensor 3 to move back and forth between the thread test ring 2 and the end face of the hobbing drill bit 6.

[0050] First, the operator installs the hobbing drill bit 6 into the CNC machine tool. Specifically, it is fixed by the three-jaw chuck 5. Then, the CNC machine tool is started, and the XYZ axis linear displacement system of the CNC machine tool drives the thread cutting tool 7 on the end face of the tool holder 101 to extend into the inner side of the front end of the hobbing drill bit 6. As the three-jaw chuck 5 rotates and the thread cutting tool 7 is fed, the machining of the connecting thread is completed (the machining of internal threads by CNC machine tool is a common existing technology in this field, so it will not be described in detail here).

[0051] After machining is completed, thread accuracy testing can be performed. Specifically, after thread machining, the waste at the machining site is first cleaned manually using an air gun to avoid affecting the subsequent testing accuracy. Then, the tooling seat 101 drives the thread test ring 2 to move and align with the thread of the hobbing drill bit 6. Next, the tooling seat 101 restricts the thread test ring 2 from rotating. Similarly, the three-jaw chuck 5 drives the hobbing drill bit 6 to rotate relative to the thread test ring 2, thereby screwing the thread test ring 2 into the hobbing drill bit 6 along its thread pattern. Then, the thread machining depth and thread coaxiality need to be tested to avoid the bearing system not being installed correctly or being installed off-center from the central axis of the hobbing drill bit 6. Specifically, in the initial state, the test push rod of the displacement sensor 3 always maintains contact with one end face of the thread test ring 2 (e.g., Figure 4As shown), after the thread test ring 2 completes the screw-in test, the displacement sensor 3 is driven to move back and forth by the linear reciprocating mechanism, so that its test push rod moves back and forth between the thread test ring 2 and the front end face of the hob drill bit 6. The displacement sensor 3 feeds back data. If the distance difference between the two planes is within the standard value, it means that the thread processing accuracy is qualified; otherwise, it is unqualified. The test of the hob drill bit 6 can be completed.

[0052] The thread cutting tool 7 and the thread test ring 2 are both assembled in the tooling base 101. Using the same drive system of the CNC machine tool, the hobbing drill bit 6 is rotated through the three-jaw chuck 5, thereby performing thread processing and thread testing in succession. This achieves an efficient and convenient integrated function of thread processing and thread testing, improving the accuracy and safety of testing.

[0053] A fixed cylindrical base 4 is provided on the middle side of the tooling assembly 1. One end of the fixed cylindrical base 4 is connected to the tooling base 101. A transverse groove for accommodating the displacement sensor 3 is provided on the upper end of the fixed cylindrical base 4. A pair of limiting blocks 301 are fixedly connected to both ends of the transverse groove. Limiting transverse holes are provided on the inner side of the limiting blocks 301. Ring sleeves are provided at both ends of the housing of the displacement sensor 3. The ring sleeves are adapted to the limiting transverse holes.

[0054] Preferably, a pair of limiting blocks 301 are used to limit the two ends of the displacement sensor 3, so that it can move up and down along the limiting transverse hole. The displacement range is the test distance between the end face of the thread test ring 2 and the front end face of the hobbing drill bit 6.

[0055] The fixed cylinder base 4 includes a pair of retaining plates 401 and a center base 402. A central shaft 403 is rotatably connected between the pair of retaining plates 401. A pair of square top blocks 404 are fixedly connected to the center side of the central shaft 403. The four corners of the square top blocks 404 are rounded. The center base 402 has a cylindrical hole for accommodating the square top blocks 404 on its center side.

[0056] Preferably, to improve the convenience of processing and assembly, the fixed cylinder base 4 is set as a split type, which is composed of a pair of retaining plates 401 and a center base 402. The linear reciprocating mechanism includes a square top block 404. Specifically, when it is necessary to drive the displacement sensor 3 to reciprocate, the central shaft 403 drives the pair of square top blocks 404 to rotate. The four corners of the blocks are all rounded. The displacement sensor 3 is continuously pushed up by the four corners and then lowered and reset under the action of gravity, so that it can reciprocate and perform detection.

[0057] The upper end of the cylindrical hole is connected to the transverse groove. The upper end of the square top block 404 is in contact with a roller 405. A central block 406 is rotatably connected between a pair of rollers 405. A top plate 407 is fixedly connected to the upper end of the central block 406. Guide rods 408 are fixedly connected to both ends of the top plate 407. A guide hole 409 is opened on the lower side of the transverse groove of the snap-fit ​​plate 401. The guide hole 409 is adapted to the guide rod 408. A tension spring is connected between the guide hole 409 and the guide rod 408.

[0058] Preferably, a top plate 407 is fixed to the lower end of the displacement sensor 3. A tension spring is connected between the guide hole 409 and the guide rod 408, so that in the initial state, the displacement sensor 3 always generates a downward force, and the roller 405 always adheres to the square top block 404. When the central shaft 403 drives the square top block 404 to rotate, the roller 405 rolls against it, thereby driving the roller 405 to drive the central block 406 and the top plate 407 to move up and down, so that the displacement sensor 3 can perform reciprocating detection. The roller 405 further reduces the friction generated when the square top block 404 is driven to rise and fall.

[0059] The test push rod head of displacement sensor 3 is equipped with a ball bearing 302.

[0060] Preferably, a ball bearing 302 is provided at the head end of the test push rod of the displacement sensor 3, so that the ball bearing 302 rolls back and forth between the end face of the threaded test ring 2 and the front end face of the hobbing drill bit 6, thereby greatly reducing the wear of the test push rod and improving its service life.

[0061] One end of the fixed cylinder base 4 is rotatably connected to the tooling base 101. The inner side of the snap-fit ​​plate 401 is provided with an adaptive circular groove 102. One end of the tooling base 101 is fixedly connected to a bearing disk 103. Rollers are arranged in annular pattern on the outer side of the bearing disk 103. The bearing disk 103 is adapted to the adaptive circular groove 102. One end of the central shaft 403 passes through the bearing disk 103 and is fixedly connected to the tooling base 101.

[0062] Preferably, a bearing disc 103 is provided, which keeps the fixed cylinder seat 4 stationary, while the tooling seat 101 can rotate relative to the fixed cylinder seat 4. The tooling seat 101 is connected to the central shaft 403. Specifically, during testing, the tooling seat 101 first restricts the threaded test ring 2 from rotating, thus tightening the threaded test ring 2 inside the hobbing drill bit 6, completing the screw-in test. Then, when the subsequent displacement sensor 3 needs to be detected, the three-jaw chuck 5 continues to drive the hobbing drill bit 6 to rotate, thereby synchronously driving the tightened threaded test ring 2 to rotate, causing the tooling seat 101 to rotate relative to the fixed cylinder seat 4. The tooling seat 101 also drives the central shaft 403 to rotate, thereby driving... The dynamic displacement sensor 3 performs a linear reciprocating motion. Since the hob drill bit 6 and the thread test ring 2 are rotating at this time, the displacement sensor 3 is always at the upper end of the fixed cylinder 4 and performs a reciprocating motion. When the square top block 404 rotates one revolution, the displacement sensor 3 moves up and down four times. Therefore, when the hob drill bit 6 and the thread test ring 2 rotate one revolution, the square top block 404 is driven to rotate one revolution. This allows the displacement sensor 3 to detect the four sides of the end face of the hob drill bit 6 once, resulting in a more comprehensive detection effect. Moreover, it does not require an additional drive component inside the CNC machine tool to drive the displacement sensor 3 to perform a linear reciprocating motion, which reduces the overall structural design difficulty and cost.

[0063] On the other side of the retaining plate 401, a bearing plate 2 104 is similarly provided. One end of the bearing plate 2 104 is fixedly connected to a sliding seat 105. Limiting grooves are provided on the four sides of the sliding seat 105. One end of the sliding seat 105 is slidably fitted with a limiting cavity 106. The inner side of the limiting cavity 106 is adapted to the sliding seat 105. The other end of the central shaft 403 passes through the bearing plate 2 104 and is fixedly connected to the sliding seat 105.

[0064] Preferably, when it is necessary to restrict the rotation of the tooling seat 101, a sliding seat 105 and a limiting cavity 106 are provided, which slide and engage with each other. Specifically, in the initial state, the sliding seat 105 is fully engaged in the limiting cavity 106, thereby restricting the sliding seat 105. The sliding seat 105 is fixedly connected to the central shaft 403, thereby restricting the tooling seat 101, so that the thread test ring 2 remains stationary until the screw-in test is completed. Then, when the displacement sensor 3 needs to be detected, the thread test ring 2 and the hobbing drill bit 6 are tightened together, so that the tooling seat 101, the fixed cylinder seat 4, and the sliding seat 105 all remain stationary. The limiting cavity 106 is displaced away from the three-jaw chuck 5 until the limiting cavity 106 is completely separated from the sliding seat 105, thereby releasing the restriction of the sliding seat 105. Then, the central shaft 403 is rotated by the three-jaw chuck 5, so that the displacement sensor 3 can perform detection.

[0065] An extension arc plate 107 is fixedly connected to the lower end of the limiting cavity 106. A guide rail recess is provided on the inner side of the extension arc plate 107. The upper side of the extension arc plate 107 is slidably engaged with the fixed cylinder seat 4. A guide rail protrusion is provided on the lower side of the fixed cylinder seat 4. The guide rail protrusion and the guide rail recess are adapted to each other. A guide rod 108 is fixedly connected to one end of the fixed cylinder seat 4. A guide groove is provided at one end of the limiting cavity 106. The guide rod 108 is slidably engaged with the guide groove.

[0066] The lower ends of the extension arc plate 107 and the limiting cavity 106 are fixedly connected to the X-axis sliding base 109.

[0067] Preferably, in order to improve the stability of the relative displacement between the limiting cavity 106 and the fixed cylinder seat 4, and in order to prevent the fixed cylinder seat 4 from rotating, an extension arc plate 107 is provided. The lower end of the fixed cylinder seat 4 and the extension arc plate 107 are respectively provided with a guide rail protrusion and a guide rail concave, so that the two guide each other and slide, thereby improving the stability of the relative displacement between the two and the support stability of the fixed cylinder seat 4.

[0068] The limiting cavity 106 and the extension arc plate 107 are driven to move by the XYZ linear displacement system inside the CNC machine tool. Specifically, an X-axis sliding base 109 is fixedly connected to the lower end of the extension arc plate 107 and the limiting cavity 106. The X-axis sliding base 109 can drive the entire tooling assembly 1 to move in the X-axis direction, so that the thread cutting tool 7 can be fed in the X-axis direction when machining threads and when the thread test ring 2 is screwed in. When the displacement sensor 3 is detected, the X-axis sliding base 109 moves in the opposite direction, so that the sliding seat 105 and the limiting cavity 106 can be stabilized. The tooling base 101 is separated and released from its restriction. After the tooling base 101 rotates one revolution and the test is completed, the X-axis sliding base 109 can be reset, so that the sliding base 105 and the limiting cavity 106 can be re-engaged for limiting. Then the three-jaw chuck 5 can rotate in the opposite direction, thereby releasing the thread test ring 2 and removing the hobbing drill bit 6 to complete the machining and testing work. In other words, the thread machining and testing functions of the hobbing drill bit 6 can be realized by only using the linear displacement system in the CNC machine tool, without the need to add an additional drive component, thus reducing the design and manufacturing costs.

[0069] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection, the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application according to the specific circumstances.

[0070] The above provides a detailed description of a testing device for manufacturing drilling cutters according to the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A testing device for manufacturing drilling cutters, comprising a CNC machine tool, characterized in that: The CNC machine tool includes a tooling assembly (1) and a three-jaw chuck (5); The three-jaw chuck (5) is used to hold the hobbing drill bit (6) and rotate it; The tooling assembly (1) includes a tooling base (101), and a thread cutting tool (7) is provided on the end face of the tooling base (101). The thread cutting tool (7) is used to cut an internal thread at the front end connection of the hobbing drill bit (6). A threaded test ring (2) is fixedly sleeved on the outer side of the tooling base (101), and the threaded test ring (2) is adapted to the threaded connection of the hobbing drill bit (6); The tooling assembly (1) also includes a linear reciprocating mechanism and a displacement sensor (3). The test push rod of the displacement sensor (3) is in contact with one end face of the thread test ring (2). The linear reciprocating mechanism is used to drive the displacement sensor (3) to move back and forth between the thread test ring (2) and the end face of the hobbing drill bit (6). A fixed cylindrical base (4) is provided on the middle side of the tooling assembly (1). One end of the fixed cylindrical base (4) is connected to the tooling base (101). A horizontal groove for accommodating the displacement sensor (3) is opened at the upper end of the fixed cylindrical base (4). A pair of limiting blocks (301) are fixedly connected to both ends of the horizontal groove. Limiting horizontal holes are opened on the inner side of the limiting blocks (301). Ring sleeves are provided at both ends of the housing of the displacement sensor (3). The ring sleeves are adapted to the limiting horizontal holes. The fixed cylinder base (4) includes a pair of retaining plates (401) and a center base (402). A central shaft (403) is rotatably connected between the pair of retaining plates (401). A pair of square top blocks (404) are fixedly connected to the middle side of the central shaft (403). The four corners of the square top blocks (404) are rounded. The middle side of the center base (402) is provided with a cylindrical hole for accommodating the square top blocks (404).

2. The testing device for manufacturing drilling cutters according to claim 1, characterized in that: The upper end of the cylindrical hole is connected to the transverse groove. The upper end of the square top block (404) is contacted by a roller (405). A central block (406) is rotatably connected between a pair of rollers (405). A top plate (407) is fixedly connected to the upper end of the central block (406). Guide rods (408) are fixedly connected to both ends of the top plate (407). A guide hole (409) is provided on the lower side of the transverse groove of the snap-fit ​​plate (401). The guide hole (409) is adapted to the guide rod (408). A tension spring is connected between the guide hole (409) and the guide rod (408).

3. The testing device for manufacturing drilling cutters according to claim 1, characterized in that: The displacement sensor (3) is equipped with a ball bearing (302) at the test push rod end.

4. The testing device for manufacturing drilling cutters according to claim 1, characterized in that: One end of the fixed cylinder seat (4) is rotatably connected to the tooling seat (101). The inner side of the snap-fit ​​plate (401) is provided with an adaptive circular groove (102). One end of the tooling seat (101) is fixedly connected to a bearing disk (103). Rollers are arranged in annular pattern on the outer side of the bearing disk (103). The bearing disk (103) is adapted to the adaptive circular groove (102). One end of the central shaft (403) passes through the bearing disk (103) and is fixedly connected to the tooling seat (101).

5. The testing device for manufacturing drilling cutters according to claim 4, characterized in that: On the other side of the card plate (401), a bearing plate two (104) is similarly provided. One end of the bearing plate two (104) is fixedly connected to a sliding seat (105). Limiting grooves are opened on the four sides of the sliding seat (105). One end of the sliding seat (105) is slidably fitted with a limiting cavity (106). The inner side of the limiting cavity (106) is adapted to the sliding seat (105). The other end of the central shaft (403) passes through the bearing plate two (104) and is fixedly connected to the sliding seat (105).

6. The testing device for manufacturing drilling cutters according to claim 5, characterized in that: The lower end of the limiting cavity (106) is fixedly connected to an extension arc plate (107). A guide rail recess is provided on the inner side of the extension arc plate (107). The upper side of the extension arc plate (107) is slidably engaged with the fixed cylinder seat (4). A guide rail protrusion is provided on the lower side of the fixed cylinder seat (4). The guide rail protrusion and the guide rail recess are adapted to each other. A guide rod (108) is fixedly connected to one end of the fixed cylinder seat (4). A guide groove is provided at one end of the limiting cavity (106). The guide rod (108) is slidably engaged with the guide groove.

7. The testing device for manufacturing drilling cutters according to claim 6, characterized in that: The lower ends of the extended arc plate (107) and the limiting cavity (106) are fixedly connected to an X-axis sliding base (109).

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