A tap machining method

Abstract

The present application relates to tap processing technical field, specifically to a new tap processing method, comprising the following steps: step one: the long raw material bar is cut according to the blank length required by single tap, forming a rough bar; after calibration, the outer circle of the rough bar is uniformly polished to the diameter size required by the blade part; the two ends of the rough bar are sharpened, and then the handle and light handle, and the air clearance area on the surface of the rough bar are processed and polished to form the accurate size required by the handle and light handle, and the air clearance; the thread on the blade part of the rough bar is processed. The present application simplifies the process of uniformly polishing the larger diameter required by the blade part first, and then processing the small diameter parts such as light handle and air clearance, to one-way processing from the large diameter of the blade part to the small diameter of the light handle and air clearance, greatly reduces the number of processes and the frequency of equipment adjustment, and shortens the production cycle.

Description

Technical Field

[0001] This invention relates to the field of tapping technology, specifically a tapping method. Background Technology

[0002] In the existing tap processing process, a cylindrical raw material bar needs to be initially ground to the required original size. Then, the cutting edge, shank, and intermediate connecting clearance of the tap are rough-machined under this original size to achieve the final required diameter for each part. Then, the cutting edge is fine-machined to produce the final required thread. However, this processing step is very troublesome, as each part needs to be rough-machined separately to achieve the required diameter.

[0003] Therefore, a tapping method is proposed to solve the problems mentioned above. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a tap machining method, comprising the following steps; Step 1: Cut the long strip of raw material into rough bars according to the blank length required for a single tap; After calibration, the outer diameter of the rough bar is uniformly ground to the required diameter of the cutting edge; The two ends of the thick bar are sharpened, and then the shank, polished shank, and clearance area on the surface of the thick bar are machined and polished to form the required precise dimensions of the shank, polished shank, and clearance area. To machine the threads on the cutting edge of a rough bar.

[0005] As a further improvement, the following steps are included; Step 2: Insert the tap processed in Step 1 into an external polishing device for fixation. Turn on the polishing device to perform fine grinding on the semi-finished tap. The polishing device includes a support frame and connecting rods located at the lower end of the support frame. There are several connecting rods, and a connecting sleeve is inserted into the lower end of each connecting rod. A strong magnetic block is placed between the connecting sleeve and the connecting rod. The polishing device uses the strong magnetic block to attract and fix the semi-finished tap in the connecting sleeve.

[0006] As a further improvement, it further includes; The lower end face of the connecting rod is provided with a connector, the connector is magnetically connected to the strong magnetic block, the strong magnetic block is magnetically connected to the inside of the connecting sleeve, and the connector is inserted into the inside of the connecting sleeve; A tap is provided below the connecting sleeve. The tap is inserted into the inside of the connecting sleeve and is magnetically connected to the lower surface of the strong magnetic block. The upper part of the connecting sleeve is provided with a placement groove, and the lower part of the connecting sleeve is provided with a insertion groove. The placement groove and the insertion groove are connected.

[0007] As a further improvement, the placement slot has a square structure, the strong magnetic block has the same structure as the placement slot, and the connector has the same structure as the strong magnetic block; the upper half of the tap is ground to form a square-shaped plug connector, the insertion slot has the same structure as the plug connector; the plug connector and the insertion slot are connected through each other, and the upper surface of the plug connector is magnetically connected to the lower surface of the strong magnetic block.

[0008] As a further improvement, the strong magnetic block has a through-hole insertion cone groove, the insertion cone groove has a cone-shaped structure, and the upper half of the tap body has a chamfered insertion connector with a cone-shaped structure. The connector passes through the connector groove, and the connector is inserted into the connector tapered groove.

[0009] As a further improvement, the grinding process is achieved through a grinding device body. The grinding device body is equipped with a drive motor to drive a drive wheel to rotate on the grinding device body. A contact rod is rotatably connected to the center of the drive wheel, and a limiting rod is fixedly connected to the side wall of the drive wheel. The limiting rod is provided with a slot. The grinding device body is provided with a limiting structure, and a receiving rod is rotatably connected to the limiting structure. The contact rod and the receiving rod are used to limit and fix both ends of the tap. When the shank of the tap contacts the contact rod, one end of the shank is inserted into the slot in the limiting rod. The drive wheel drives the tap to rotate through the limiting rod. The tap is processed by the grinding wheel on the fine grinding equipment. After processing, the tap is transferred by a robotic arm next to the fine grinding equipment, and then the tap to be processed is moved to the contact rod area for further processing.

[0010] Compared with the prior art, the present invention provides a tap machining method, which has the following beneficial effects: 1. The present invention uses the fixture and the shank of the tap to clamp the tap, which avoids the fixture from being clamped in the first and second areas during the polishing process and causing scratches, thus avoiding the need for secondary polishing. Furthermore, since the fixture and the tap are set perpendicular to the horizontal plane, the sand will not enter the clamping area of ​​the fixture and the tap during the polishing process.

[0011] 2. This invention performs fine grinding on the shank and the clearance section, and then performs thread grinding on the cutting edge. This reduces the fine grinding process on the cutting edge area. The size of the rough die is set to the size required for thread grinding on the cutting edge. The radius of the cutting edge is larger than the radius of the shank and the intermediate connecting part, thus saving processing steps.

[0012] 3. Based on the magnetic attraction of the strong magnetic block itself, the connector, strong magnetic block, connecting sleeve, and tap can be positioned and connected. Based on the magnetic attraction of the connection, the tap and connecting sleeve can be easily adjusted and replaced, improving the convenience of replacement.

[0013] 4. By magnetically connecting the connector and the taper groove, the upper half of the tap can be magnetically fixed, thus achieving the effect of fixing the tap as a whole. Compared with the traditional method of clamping the tap as a whole, the tap can be ground and shaped in one go, preventing the clamped part from being unable to be effectively ground.

[0014] 5. By setting the shapes of the insertion conical groove and the insertion connector to fit each other in a conical shape, the connection area between the insertion connector and the insertion conical groove is increased, ensuring the stability of the magnetic connection of the tap body.

[0015] 6. By setting the connector and the strong magnet to the same square structure, the contact area between the connector and the strong magnet is maximized, ensuring that the magnetic connection is stable and reliable when the connector is used in different configurations. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the tap structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the grinding device of the present invention; Figure 3 This is a schematic diagram of the limiting rod structure of the present invention; Figure 4 This is a comparative schematic diagram of the tapping process of the present invention and the tapping process of the prior art; Figure 5 This is a schematic diagram of the polishing equipment in this invention; Figure 6 This is a schematic diagram illustrating the overall structure of the connecting sleeve connection method in this invention; Figure 7 This is a schematic diagram of the structure of the first connecting sleeve of the present invention; Figure 8 This is a schematic diagram of another connecting sleeve according to the present invention.

[0017] In the diagram: 1. Support frame; 2. Connecting rod; 3. Connector; 4. Strong magnet; 401. Insertion taper groove; 5. Connecting sleeve; 501. Placement groove; 502. Insertion groove; 6. Tap body; 601. Insertion joint; 7. Shank; 8. Polished shank; 9. Clearance part; 10. Cutting edge; 11. Connecting sleeve; 12. Magnet; 13. Insertion hole; 14. Grinding device body; 15. Drive wheel; 16. Contact rod; 17. Limiting rod; 18. Limiting structure; 19. Receiving rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please see Figure 1 and Figure 6 This embodiment provides a tap machining method for machining such as... Figure 1 The tap shown has the structural feature that the dimensions of the shank 8 and the clearance portion 9 are designed to be smaller than the dimensions of the cutting edge 5, that is, the diameters of the shank 8 and the clearance portion 9 are smaller than the diameter of the cutting edge 10. Under the premise of the process dimensions of this product, the following steps are included when processing the tap. Step 1: Cut the long strip of raw material into rough bars according to the blank length required for a single tap; After calibration, the outer diameter of the rough bar is uniformly ground to the diameter required for the cutting edge 10. Machining the thread on the cutting edge 10 of the rough bar; The two ends of the thick rod are sharpened, and then the shank 7, smooth shank 8, and clearance 9 areas on the surface of the thick rod are processed and polished to form the required precise dimensions of the shank 7, smooth shank 8, and clearance 9. Of course, you can first sharpen both ends of the thick rod, then process and grind the shank 7, smooth shank 8, and clearance 9 areas on the surface of the thick rod to form the required precise dimensions of the shank 7, smooth shank 8, and clearance 9, and then process the threads of the cutting edge 10 on the thick rod.

[0020] This process abandons the traditional method of rough machining each part one by one. Instead, it first grinds the larger diameter required for the cutting edge, and then processes the smaller diameter parts such as the shank and clearance. Leveraging the smaller size of the shank and clearance, it simplifies the repetitive rough machining process from the original size to the target size into a unidirectional machining process from the large diameter of the cutting edge to the small diameter of the shank and clearance. This optimization significantly reduces the number of processes and the frequency of equipment adjustments, shortens the production cycle, is more suitable for mass production scenarios, and effectively improves the overall manufacturing efficiency of taps.

[0021] Secondly, the process uses "uniform grinding of the cutting edge diameter after calibration center" as the core benchmark. Subsequent machining of the shank 7, polished shank 8, and clearance section 9 involves precise trimming from the large diameter of the cutting edge to a smaller size. This unified benchmark and machining logic from large to small can minimize the benchmark switching errors and dimensional accumulation deviations caused by traditional multi-part individual rough machining. It effectively ensures the coaxiality and dimensional matching of various parts of the tap (such as the transmission fit accuracy between the shank and the equipment, the clearance control accuracy of the clearance section, and the basic accuracy of the thread machining of the cutting edge), significantly improving product accuracy and consistency, and thus ensuring the stability of the tap during use (such as the smoothness of thread machining and the reliability of cutting force transmission).

[0022] For further details, please refer to Figure 4 and Figure 5 In step one, the grinding process is achieved through a grinding device body 14. A drive motor is installed inside the grinding device body 14 to drive a drive wheel 15 to rotate on the grinding device body 14. A contact rod 16 is fixedly installed at the center of the drive wheel 15. The contact rod 16 only serves to hold the tap in place and does not drive the tap to rotate. A limiting rod 17 is fixedly connected to the side wall of the drive wheel 15. A limiting structure 18 is provided on the grinding device body 14, and a receiving rod 19 is rotatably connected to the limiting structure 18. The contact rod 16 and the receiving rod 19 are used to limit and fix both ends of the tap; for example... Figure 4 The limiting rod 17 is designed in an L-shape. The vertical part of the limiting rod 17 has a groove for limiting and fixing the tap. Under the rotation of the drive wheel 15, it drives the tap to rotate around the contact rod 16 as the central axis. The limiting rod 17 is used to drive the tap to rotate. When the tap is fixed on the contact rod 16, the shank 7 of the tap is restricted in the groove and cannot move. When the limiting rod 17 rotates, it can transmit force to the tap. Since the limiting rod 17 contacts the shank 7 of the tap, it does not contact the surface of the shank 8 and the clearance part 9, and it does not cause scratches to the surface of the shank 8 and the clearance part 9.

[0023] When the shank 7 of the tap contacts the contact rod 16, one end of the shank 7 is inserted into the slot in the limiting rod 17. The drive wheel 15 drives the tap to rotate through the limiting rod 17, and the grinding wheel on the precision grinding equipment processes each part of the tap sequentially. This effectively complements step one and efficiently completes the process. Figure 4 The present invention enables rapid and complete fine grinding in the first and second grinding areas. After the grinding is completed, the tap is transferred by a robotic arm next to the fine grinding equipment, and then the tap to be processed is moved to the contact rod 16 area for further processing. The entire step one, in conjunction with the grinding device body 14, can complete all actions such as rough grinding and thread cutting in step one. Finally, the grinding device body 14 performs fine grinding on all other parts at once, thus completing the dimensional processing of all parts on the tap and greatly improving the overall work efficiency. In addition, the tap can be installed and removed quickly, and scratches on other parts of the tap surface are avoided when the tap is clamped and fixed, thus avoiding secondary processing and grinding.

[0024] The robotic arm is initially positioned between the finished product storage area and the material rack to be processed, and its end is equipped with a dual-station pneumatic gripper (compatible with tap shank / tail gripping). After the precision grinding equipment completes the current tap processing, it sends a processing completion signal to the robotic arm control system. The robotic arm moves along the preset path to the precision grinding station, the gripper positions itself on the tap, the pneumatic gripper closes to hold the tap, the receiving rod 19 driven by the limiting structure 18 automatically retracts to release the tap, the robotic arm vertically lifts the tap out of the limiting rod 17 slot, and the robotic arm transfers the finished tap to the placement area. The robotic arm picks up a new tap from the material rack, precisely inserts the tap shank 7 into the slot of the limiting rod 17, the receiving rod 19 automatically moves forward to tighten the tail of the tap, the gripper releases and retracts to a safe position, and sends a signal that the loading is complete.

[0025] For further details, please refer to Figure 5 - Figure 8 In this embodiment, step two: insert the tap processed in step one into... Figure 5 The semi-finished tap is fixed in an external polishing device. The polishing device is then turned on to perform fine grinding on the semi-finished tap. The polishing device includes a support frame 1 and connecting rods located at the lower end of the support frame. There are several connecting rods, and a connecting sleeve is inserted into the lower end of each connecting rod. A strong magnetic block is placed between the connecting sleeve and the connecting rod. The polishing device uses the strong magnetic block to attract and fix the semi-finished tap in the connecting sleeve. After polishing is completed in step four, the tap is pulled out downwards, causing the tap to separate from the magnet 12 and the sleeve 11, which completes the transfer of the tap, improving the transfer time and polishing effect.

[0026] After the tap has completed the above pretreatment, this embodiment provides a polishing device for the subsequent grinding and external polishing of the tap. The polishing device includes a support frame 1, the upper end of the support frame 1 is used to install inside the polishing device and to place the entire fixture inside the polishing device, and a connecting rod 2 is provided at the lower end of the support frame 1. There are several connecting rods 2, and a connecting sleeve 5 is inserted into the lower end of the connecting rod 2. A strong magnetic block 4 is provided between the connecting sleeve 5 and the connecting rod 2. A connector 3 is provided on the lower end face of the connecting rod 2. The connector 3 is magnetically connected to the strong magnetic block 4. The strong magnetic block 4 is magnetically connected to the inside of the connecting sleeve 5. The connector 3 is inserted into the inside of the connecting sleeve 5. A tap 6 is provided below the connecting sleeve 5. The tap 6 is inserted into the inside of the connecting sleeve 5. After passing through the insertion groove 502, the tap 6 is magnetically connected to the lower surface of the strong magnetic block 4. Among them, by installing a drive source on the upper end of the support frame 1, the device is equipped with the ability to drive the rotation of a single connecting rod 2, rotate the upper part as a whole, and support the height movement of the upper part. This driving method is a well-known technology in the field, so it is not described in detail in this embodiment. At the same time, grinding material is placed in the grinding cylinder below the tap to ensure uniform and stable grinding of the tap body 6. Based on the magnetic attraction of the strong magnetic block 4 itself, the connector 3, strong magnetic block 4, connecting sleeve 5, and tap 6 can be positioned and connected. Based on the magnetic attraction of their connection, the tap 6 and connecting sleeve 5 can be easily adjusted and replaced, improving the convenience of replacement. At the same time, this structure contacts the tap body with the smallest possible area, ensuring that the rough grinding, fine grinding, and threaded parts are not damaged by clamping.

[0027] The upper part of the connecting sleeve 5 is provided with a placement groove 501 for placing strong magnetic blocks 4 of different structures to attract taps 6 of different shapes. The lower part of the connecting sleeve 5 is provided with a insertion groove 502, and the placement groove 501 is connected to the insertion groove 502. like Figure 8 In the middle, the placement slot 501 has a square structure, the strong magnetic block 4 has the same structure as the placement slot 501, and the connector 3 has the same structure as the strong magnetic block 4. like Figure 7 In the middle, the strong magnetic block 4 has a through-hole insertion cone groove 401, which has a cone-shaped structure. The upper half of the tap 6 has a chamfered cone-shaped insertion connector 601. The connector 601 passes through the connector groove 502, and the connector 601 is inserted into the connector cone groove 401; The connecting sleeve 5 has a placement groove 501 inside, which provides a placement space for the strong magnetic block 4. The insertion groove 502, which matches the diameter of the tap 6, provides a guide support for the tap 6 and the insertion connector 601, so that the insertion connector 601 and the insertion tapered groove 401 are inserted and positioned. By setting the shape of the insertion tapered groove 401 and the insertion connector 601 to be a tapered shape that fits each other, the connection area between the insertion connector 601 and the insertion tapered groove 401 is increased, ensuring the stability of the magnetic connection of the tap 6. By magnetically connecting the connector 601 and the taper groove 401, the upper half of the tap 6 can be magnetically fixed, thus achieving the effect of fixing the tap 6 as a whole. Compared with the traditional method of clamping most of the tap 6 and then grinding it in stages, this clamping method only needs to fix the top of the tap to achieve stable fixing and grind the tap 6 in one go, which improves efficiency and ensures stability during grinding.

[0028] The strong magnetic block 4 has an integral square structure. The upper half of the tap 6 is ground into a square structure of the connector 601. The connector groove 502 has the same structure as the connector 601. The connector 601 passes through the connector slot 502, and the upper surface of the connector 601 is magnetically connected to the lower surface of the strong magnet 4. By setting the connector 601 and the strong magnet 4 to the same square structure, the contact area between the connector 601 and the strong magnet 4 is maximized when the tap 6 is inserted into the connecting sleeve 5, ensuring that the magnetic connection is stable and reliable when the connector 601 is used in different configurations.

[0029] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

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

Claims

1. A tap machining method, characterized in that, Includes the following steps; Step 1: Cut the long strip of raw material into rough bars according to the blank length required for a single tap; After calibrating the center, the outer circle of the coarse bar is uniformly ground to the diameter required by the cutting edge (10); Machining the thread on the cutting edge (10) of the rough bar; The two ends of the thick rod are sharpened, and then the shank (7), smooth shank (8), and clearance (9) areas on the surface of the thick rod are processed and polished to form the required precise dimensions of the shank (7), smooth shank (8), and clearance (9); Step 2: Insert the tap processed in Step 1 into an external polishing device for fixation, and turn on the polishing device to perform fine grinding on the semi-finished tap. The polishing device includes a support frame (1) and a connecting rod (2) set at the lower end of the support frame (1). There are several connecting rods (2). A connecting sleeve (5) is inserted into the lower end of the connecting rod (2). A strong magnetic block (4) is set between the connecting sleeve (5) and the connecting rod (2). The polishing device uses the strong magnetic block (4) to attract and fix the semi-finished tap in the connecting sleeve (5). The lower end face of the connecting rod (2) is provided with a connector (3), the connector (3) is magnetically connected to the strong magnetic block (4), the strong magnetic block (4) is magnetically connected to the inside of the connecting sleeve (5), and the connector (3) is inserted into the inside of the connecting sleeve (5). A tap (6) is provided below the connecting sleeve (5). The tap (6) is inserted into the interior of the connecting sleeve (5). The tap (6) is magnetically connected to the lower surface of the strong magnetic block (4). The upper part of the connecting sleeve (5) is provided with a placement groove (501), and the lower part of the connecting sleeve (5) is provided with a insertion groove (502). The placement groove (501) and the insertion groove (502) are connected.

2. The tap machining method according to claim 1, characterized in that: The placement slot (501) has a square structure, the strong magnetic block (4) has the same structure as the placement slot (501), and the connector (3) has the same structure as the strong magnetic block (4); the upper half of the tap (6) is ground to form a square-shaped plug (601), the insertion slot (502) has the same structure as the plug (601); the plug (601) and the insertion slot (502) are connected through each other, and the upper surface of the plug (601) is magnetically connected to the lower surface of the strong magnetic block (4).

3. The tap machining method according to claim 1, characterized in that: The strong magnetic block (4) has a through-hole insertion cone groove (401) inside, the insertion cone groove (401) has a cone-shaped structure, and the upper half of the tap (6) has a chamfered insertion connector (601) with a cone-shaped structure. The connector (601) passes through the connector groove (502), and the connector (601) is inserted into the connector cone groove (401).

4. The tap machining method according to claim 1, characterized in that: The polishing process is achieved through a polishing device body (14). The polishing device body (14) is equipped with a drive motor to drive the drive wheel (15) to rotate on the polishing device body (14). A contact rod (16) is rotatably connected to the center of the drive wheel (15). A limiting rod (17) is fixedly connected to the side wall of the drive wheel (15). A slot is provided on the limiting rod (17). A limiting structure (18) is provided on the polishing device body (14). A bearing is rotatably connected to the limiting structure (18). The connecting rod (19), contact rod (16) and receiving rod (19) are used to restrict and fix the two ends of the tap. When the shank (7) of the tap contacts the contact rod (16), one end of the shank (7) is inserted into the slot in the limiting rod (17). The drive wheel (15) drives the tap to rotate through the limiting rod (17). The tap is processed by the grinding wheel on the fine grinding equipment. After the processing is completed, the tap is transferred by the mechanical arm next to the fine grinding equipment. Then the tap to be processed is moved to the area of ​​the contact rod (16) for further processing.

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