Combined type tapping equipment and working method

Abstract

The invention relates to the technical field of screw taps, and particularly discloses combined type tapping equipment and a working method.The combined type tapping equipment comprises a cone and a screw tap wrench, the cone and the screw tap wrench are in clearance fit and are fixed through a pin shaft, the cone is provided with a tooth path and a reverse thread groove, conical teeth are installed in the tooth path, and tapping tooth bodies are arranged on the conical teeth; a tapping sleeve is fixedly connected to the tap wrench, a tap base is rotationally installed on the tap wrench through a bearing, a base through hole is formed in the middle of the tap base, the tap base is located in the tapping sleeve, a plurality of guide grooves are formed in the tapping sleeve, and grips are installed on the tap base and in the guide grooves of the tapping sleeve. The handle rotates to control the tapping sleeve, the tap wrench and the cone to rotate integrally; the overall use efficiency of the screw tap is improved, the production cost is reduced, the application range is wide, reciprocating rotary tapping is achieved instead of consistent rotation, operation is simpler, and efficiency is higher; the operation is more labor-saving, the labor input is less, and the replacement cost is lower.

Description

Technical Field

[0001] The present invention relates to the technical field of taps, and in particular to a composite tapping device and a working method. Background Art

[0002] A tap is a tool used to create internal threads. Based on shape, it can be categorized as spiral-fluted taps, angled-edge taps, straight-fluted taps, and pipe thread taps. Based on usage, it can be divided into hand taps and machine taps. Based on specifications, it can be categorized into metric, American, and imperial taps. Taps are the most common tool used by manufacturing operators for threading.

[0003] Tapping is a relatively difficult machining process because the tap is almost buried in the workpiece during cutting. The machining load per tooth is greater than that of other tools. Furthermore, the tap has a very large contact surface with the workpiece along the thread, and must accommodate and remove chips while cutting. Therefore, taps are prone to problems such as cone breakage and tooth wear under extremely harsh conditions, both of which lead to tap wear and consumption. Wear is exacerbated in harder materials, and if some of the tap teeth are damaged, the entire tap will be scrapped. Therefore, it is necessary to design a composite tapping device and working method to address the problems of high tap consumption, short service life, and high tapping costs in existing tapping operations. Summary of the Invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a composite tapping device and a working method.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a composite tapping device, comprising a cone and a tap wrench, wherein the cone and the tap wrench are clearance-fitted and fixed by a pin, the cone is provided with a tooth path and a thread-reversing groove, the tooth path is provided with a tapered tooth, and the tapered tooth is provided with a tapping tooth body;

[0006] The tapping sleeve is fixedly connected to the tap wrench, and the tap base is rotatably installed on the tap wrench through a bearing. A base through hole is provided in the middle of the tap base, and the tap base is located inside the tapping sleeve. A plurality of guide grooves are provided on the tap base and in the guide grooves of the tapping sleeve. The rotation of the handle controls the overall rotation of the tapping sleeve, the tap wrench and the cone.

[0007] Specifically, a mounting groove is provided on one side of the tap wrench, a mounting rod is provided on the cone, a pin through hole is provided at the matching position of the mounting rod and the mounting groove, and the pin passes through the pin through hole to fix the cone and the tap wrench.

[0008] Specifically, a baffle is fixedly installed on the outer side of the cone by bolts, and the baffle blocks the outer side of the cone gear.

[0009] Specifically, the tooth path and the thread-reversing groove are arranged at intervals, and the thread-reversing groove discharges debris generated by tapping.

[0010] Specifically, a plurality of guide grooves are relatively provided on the barrel of the tapping sleeve, the guide grooves are in an arrow-shaped structure, and a communicating channel is directly provided in the guide grooves.

[0011] Specifically, the handle is provided with handle 1, handle 2, a latch and a connecting shaft. Handle 1 is provided with a groove, and handle 2 is provided with a connecting shaft. The connecting shaft passes through the through hole of the base and is inserted into the groove. Both handle 1 and handle 2 are provided with a latch, and the shape of the latch is adapted to the guide groove. The latch on handle 1 is inserted into the guide groove on one side of the tapping sleeve, and the latch on handle 2 is inserted into the opposite guide groove on the other side of the tapping sleeve.

[0012] Specifically, the locking tooth includes a rotating shaft, a tooth body, a retaining spring and a tooth seat. The tooth seat is fixedly mounted on handle one or handle two. The tooth bodies are rotatably connected on both sides of the tooth seat through the rotating shaft. A retaining spring is installed between the tooth body and the tooth seat. The reset force of the retaining spring supports the tooth body to open relative to the tooth seat. The width of the tooth seat is smaller than the width of the connecting channel. When the tooth body is retracted into the tooth seat, it passes through the connecting channel and enters the adjacent guide groove.

[0013] Specifically, a positioning sleeve is sleeved on the outer side of the cone, and distance scales are provided at corresponding positions on the outer sides of the cone and the tap wrench. The displacement of the cone and the tap wrench relative to the positioning sleeve during tapping operation is observed through the distance scale to monitor the tapping depth.

[0014] A working method of a composite tapping device comprises the following steps:

[0015] S1. Before use, connect the cone with the cone teeth and the tap wrench with the handle and secure them with the pin.

[0016] S2. The tapping sleeve has an arrow-shaped guide groove, and the handle has an arrow-shaped tooth. The rotation direction of the arrow tail is consistent with the tapping rotation direction, and the arrow head is opposite. When tapping, the handle is rotated. The tail of the tooth arrow collides with the guide groove, which drives the guide groove to rotate, and further drives the cone to rotate, thereby tapping.

[0017] S3. After the operator rotates both hands 90 degrees, they directly reverse to the initial position. The arrow head of the clamping tooth collides with the inner bevel of the guide groove, driving the clamping tooth to compress the retaining spring. The rotating shaft rotates, thereby realizing the rotation of the clamping tooth through the bearing. The tapping sleeve does not move. Therefore, the tapping is performed by reciprocating 90 degrees.

[0018] S4. When the tapping equipment is put into use and assembled, align the taper of the equipment with the circular hole to be processed and move it downward. During the process of the cone going deeper, check the contact between the end face of the positioning sleeve and the surface of the processed circular hole to determine whether the cone is vertical, thereby ensuring vertical tapping of the cone;

[0019] S5. After confirming that the cone is tapping, use both hands to continuously reciprocate to drive the cone to rotate and tap continuously. If the tapping hole diameter is too large, change the grip length;

[0020] S6. When tapping, observe the tapping depth by observing the measuring scale scale between the positioning sleeve and the tapping cone to ensure the tapping quality.

[0021] The present invention has the following beneficial effects:

[0022] The composite tapping equipment and working method designed by the present invention are characterized in that the bevel teeth and the cone body are independently replaceable. When the bevel teeth are damaged, only the damaged bevel teeth need to be replaced instead of being scrapped as a whole, thereby improving the overall use efficiency of the tap and reducing production costs.

[0023] The composite tapping equipment and working method designed by the present invention have a separate structure for the cone and the tap wrench, which are fixed by a pin shaft, so that the pin shaft is subjected to force instead of the tap body, thereby reducing tap wear. By replacing different cone sizes, the tapping operation of holes with different diameters can be met, and the application range is wide.

[0024] The composite tapping equipment and working method designed by the present invention have a handle with replaceable length and reciprocating rotary tapping instead of uniform rotation, which makes operation simpler and more efficient.

[0025] The composite tapping equipment and working method designed in the present invention do not require rewinding. In the traditional tapping operation, rewinding is mainly used to cut off iron chips and correct the position of the tap. The tapping equipment of the present application directly cleans the chips through the rewinding groove, and there is no need to worry about the accumulation of iron chips causing wear of the tap. In addition, due to the presence of the positioning sleeve, the tap is always kept straight and there is no need to change its position. The operation is more labor-saving, the labor input is less, and the replacement cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the compound tapping equipment.

[0027] Figure 2 It is a structural diagram of a compound tapping device without a positioning sleeve.

[0028] Figure 3 It is a cross-sectional view of a compound tapping device.

[0029] Figure 4 It is a structural diagram of bevel gear.

[0030] Figure 5 It is a side view of the compound tapping equipment.

[0031] Figure 6 It is a partial cross-sectional view of the handle.

[0032] Figure 7 It is a structural diagram of the tapping sleeve.

[0033] Figure 8 It is a structural diagram of the latch teeth.

[0034] In the figure: 1. baffle; 2. taper tooth; 2-1. tapping tooth body; 2-2. tooth path; 2-3. thread groove; 3. cone; 4. tap wrench; 5. handle; 6. tapping sleeve; 7. bearing; 8. tap base; 9. positioning sleeve; 6-1. cylinder; 6-2. guide groove; 5-1. handle 1; 5-2. handle 2; 5-3. latching tooth; 5-4. connecting shaft; 5-3-1. rotating shaft; 5-3-2. tooth body; 5-3-3. retaining spring; 5-3-4. tooth seat. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] like Figures 1-8 As shown, a composite tapping device includes a baffle 1, a bevel gear 2, a cone 3, a tap wrench 4, a handle 5, a tapping sleeve 6, a bearing 7, a tap base 8, a locating sleeve 9, and a pin 10. The cone 3 and tap wrench 4 are clearance-fitted and secured by the pin 10. The tap wrench 4 has a mounting slot on one side, and the cone 3 has a mounting rod. A pin hole is provided between the mounting rod and the mounting slot, through which the pin 10 secures the cone 3 and tap wrench 4. The cone 3 and tap wrench 4 are two separate parts, rather than being integral. By replacing different models of cone 3 or cone gear 2, tapping of internal threads of varying diameters is possible, resulting in high interchangeability and robust replacement. The cone 3 and tap wrench 4 are connected by the pin 10, which provides an overfit connection with minimal clearance, ensuring tapping accuracy. The pin 10 also bears the primary load, preventing damage to the pin without damaging the cone. The pin 10 is made of 40Cr material and is tempered to have a hardness of HB250-260. It has high hardness and strong wear resistance.

[0037] Cone 3 is equipped with a tooth path 2-2 and a tapping groove 2-3. A bevel tooth 2 is mounted within tooth path 2-2, and tapping tooth 2 is provided with a tapping tooth body 2-1. Tooth path 2-2 and tapping groove 2-3 are spaced apart, with tapping groove 2-3 discharging chips generated by tapping. This not only ensures clearance between the bevel gears to prevent burnout from continuous tapping, but also allows chips generated during tapping to fall through tapping groove 2-3. Cone 3 is tempered and constructed of 42CrMo material, resulting in increased hardness and resistance to breakage. When the tap is damaged by force, bevel tooth 2 is the first to be damaged, making it easy to clean and convenient to operate. The replaceable bevel tooth 2 significantly reduces purchase costs and allows tapping of different materials by replacing bevel teeth 2 with different materials.

[0038] The outer side of the cone 3 is fixed with a baffle 1 by bolts, and the baffle 1 blocks the outer side of the bevel gear 2. Thus, the bevel gear 2 is fixed in the tooth path 2-2.

[0039] A tapping sleeve 6 is fixedly connected to the tap wrench 4. A tap base 8 is rotatably mounted on the tap wrench 4 via a bearing 7. The bearing 7 primarily allows for relative movement between the tap base 8 and the tap wrench 4. A central through-hole is defined in the tap base 8, which is positioned within the tapping sleeve 6. The tapping sleeve 6 is provided with multiple guide grooves 6-2. A handle 5 is mounted on the tap base 8 and within the guide grooves 6-2 of the tapping sleeve 6. Rotation of the handle 5 controls the integrated rotation of the tapping sleeve 6, the tap wrench 4, and the taper 3. The handle 5 is secured to the tap wrench 4 via a central through-hole in the tap base 8, enabling tapping.

[0040] A plurality of guide grooves 6 - 2 are relatively provided on the barrel 6 - 1 of the tapping sleeve 6 . The guide grooves 6 - 2 are arrow-shaped structures, and a communication channel is directly provided on the guide grooves 6 - 2 .

[0041] The handle 5 comprises a first handle 5-1, a second handle 5-2, a latching tooth 5-3, and a connecting shaft 5-4. The first handle 5-1 is provided with a groove, while the second handle 5-2 is provided with a connecting shaft 5-4. The connecting shaft 5-4 passes through a through hole in the base and is inserted into the groove. Both the first handle 5-1 and the second handle 5-2 are provided with latching teeth 5-3, the shape of which matches the guide groove 6-2. The latching tooth 5-3 on the first handle 5-1 is inserted into the guide groove 6-2 on one side of the tapping sleeve 6, while the latching tooth 5-3 on the second handle 5-2 is inserted into the opposite guide groove 6-2 on the other side of the tapping sleeve 6. The handle 5 is connected to the tap base 8 via the connecting shaft 5-4. The first and second handles 5-1 and 5-2 are connected by a shaft hole, making them highly interchangeable. Grips of different lengths can be exchanged according to the tapping diameter to increase the rotational torque and reduce the labor required for tapping. The tapping sleeve 6 is integrally fixedly matched with the tap. During tapping, the tapping sleeve 6 is rotated by the handle 5, thereby driving the cone 3 to perform tapping.

[0042] The latching tooth 5-3 includes a rotating shaft 5-3-1, a tooth body 5-3-2, a retaining spring 5-3-3 and a tooth seat 5-3-4. The tooth seat 5-3-4 is fixedly mounted on handle 1 5-1 or handle 2 5-2. The tooth bodies 5-3-2 are rotatably connected to the tooth seats 5-3-4 on both sides through the rotating shaft 5-3-1. A retaining spring 5-3-3 is installed between the tooth body 5-3-2 and the tooth seat 5-3-4. The restoring force of the retaining spring 5-3-3 supports the tooth body 5-3-2 to open relative to the tooth seat 5-3-4. The width of the tooth seat 5-3-4 is smaller than the width of the connecting channel. When the tooth body 5-3-2 is retracted into the tooth seat 5-3-4, it passes through the connecting channel and enters the adjacent guide groove 6-2.

[0043] The handle 5 includes a latching tooth 5-3, and the tapping sleeve 6 includes a guide groove 6-2. The latching tooth 5-3 and the guide groove 6-2 have a clearance fit. When tapping, the back of the tooth 5-3-2 is lifted by the retaining spring 5-3-3 and collides with the guide groove 6-2, driving the tapping sleeve 6 to rotate. After a quarter-circle tapping rotation, the handle 5 is rotated back. The tooth 5-3-2 now collides with the inclined surface of the guide groove 6-2, compressing the retaining spring 5-3-3 and pressing it toward the center via the rotating shaft 5-3-1. This prevents the tapping sleeve 6 from rotating, and the handle 5 rotates back to its original position via the bearing 7, allowing the next tapping step to proceed. The tap tap performs a reciprocating quarter-circle motion using the handle 5, rather than the continuous full-circle motion of traditional tapping, which is not only time-consuming and labor-intensive but also exacerbates arm pain.

[0044] A positioning sleeve 9 is mounted on the outside of the cone 3. Distance scales are provided on the corresponding positions on the outside of the cone 3 and the tap wrench 4. The displacement of the cone 3 and the tap wrench 4 relative to the positioning sleeve 9 during tapping is observed on the distance scale to monitor the tapping depth. During tapping, before the cone 3 contacts the end face of the hole, the positioning sleeve 9 will first contact the plane where the hole is located. The contact surface of the positioning sleeve 9 and the plane can be used to determine whether the tap enters the hole vertically, effectively reducing the overall tilt of the tap and ensuring tapping accuracy and efficiency. A measuring ruler is provided between the positioning sleeve 9 and the cone 3, which can effectively monitor the tapping depth or observe the tap inclination through the dimensions on both sides.

[0045] A working method of a composite tapping device includes the following steps.

[0046] 1. Before using this tapping equipment, select a cone 3 of appropriate size. Powder metallurgy high-speed steel is generally used, and cobalt-containing bevel teeth are used for stainless steel tapping. After selection, install four bevel teeth 2, with a central angle of 90°, secured to the cone 3 via baffle 1. After installation, install the positioning sleeve 9. The front plane of the positioning sleeve 9 is at a 90° angle to the tap as a whole, with a perpendicularity error within 0.2mm. The tooth paths 2-2 of the bevel teeth 2 contain a thread groove 2-3, which not only cushions the bevel teeth 2 and prevents excessive wear, but also facilitates the removal of debris. Before use, connect the cone 3 with the bevel teeth 2 installed to the tap wrench 4 with the handle 5 installed, and secure them with the pin 10. As the pin 10 rotates, it bears the primary force and can be replaced promptly after wear, rather than replacing the main body of the tapping equipment. This reduces replacement costs, increases efficiency, facilitates simple operation, and offers strong interchangeability.

[0047] 2. The tapping sleeve 6 contains an arrow-shaped guide groove, and the handle 5 contains an arrow-shaped tooth. The rotation direction of the arrow tail is consistent with the tapping rotation direction, and the arrow head is opposite. When tapping, the handle 5 is rotated. Since the tail of the tooth arrow collides with the guide groove 6-2, the guide groove 6-2 is driven to rotate, and further the cone 3 is driven to rotate for tapping.

[0048] 3. After the operator rotates both hands 90 degrees, they directly rotate in the opposite direction to the initial position. The arrow head of the latch tooth 5-3 collides with the internal bevel of the guide groove 6-2, driving the latch tooth 5-3 to compress the retaining spring 5-3-3, which rotates through the rotating shaft 5-3-1, thereby realizing the rotation of the latch tooth 5-3 through the bearing 7. The tapping sleeve 6 does not move. Therefore, reciprocating 90-degree rotation is performed to perform tapping, instead of uniform rotation or continuous change of the grip 5 position, which is more efficient and saves time and effort.

[0049] 4. When the tapping equipment is put into use and assembled, align the cone of the equipment with the circular hole to be processed and move it downward. During the penetration of the cone 3, check the contact between the end face of the positioning sleeve 9 and the surface of the processed circular hole to determine whether the cone 3 is vertical, thereby ensuring that the cone 3 is tapped vertically; this not only reduces labor input, but also makes it easier to ensure the quality of tapping.

[0050] 5. After confirming that the cone is tapping, use both hands to continuously reciprocate to drive the cone 3 to rotate and tap continuously. If the diameter of the tapped hole is too large, change the length of the grip; thereby increasing the lever arm and reducing the torque, thereby saving effort and efficiently tapping large holes.

[0051] 6. When tapping, observe the tapping depth by observing the measuring scale scale between the positioning sleeve 9 and the tapping cone 3 to ensure the tapping quality.

[0052] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

[0053] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. A composite tapping device, characterized in that: It includes a cone and a tap wrench, wherein the cone and the tap wrench are clearance-matched and fixed by a pin shaft, the cone is provided with a tooth path and a thread groove, the tooth path is provided with a tapered tooth, and the tapered tooth is provided with a tapping tooth body; The tapping sleeve is fixedly connected to the tap wrench, and the tap base is rotatably installed on the tap wrench through a bearing. A base through hole is provided in the middle of the tap base, and the tap base is located inside the tapping sleeve. A plurality of guide grooves are provided on the tap base and in the guide grooves of the tapping sleeve. The rotation of the handle controls the overall rotation of the tapping sleeve, the tap wrench and the cone.

2. The compound tapping device according to claim 1, characterized in that: A mounting groove is provided on one side of the tap wrench, a mounting rod is provided on the cone, a pin through hole is provided at the matching position of the mounting rod and the mounting groove, and the pin passes through the pin through hole to fix the cone and the tap wrench.

3. The compound tapping device according to claim 1, characterized in that: A baffle is fixedly installed on the outer side of the cone through bolts, and the baffle blocks the outer side of the cone gear.

4. The compound tapping device according to claim 1, characterized in that: The tooth path and the thread-reversing groove are arranged at intervals, and the thread-reversing groove discharges debris generated by tapping.

5. The compound tapping device according to claim 1, characterized in that: The body of the tapping sleeve is provided with a plurality of guide grooves in a relative manner. The guide grooves are in an arrow-shaped structure, and a communication channel is directly provided in the guide grooves.

6. The compound tapping device according to claim 5, characterized in that: The handle is provided with handle 1, handle 2, a latch and a connecting shaft. Handle 1 is provided with a groove, and handle 2 is provided with a connecting shaft. The connecting shaft passes through the through hole of the base and is inserted into the groove. Both handle 1 and handle 2 are provided with a latch, and the shape of the latch is adapted to the guide groove. The latch on handle 1 is inserted into the guide groove on one side of the tapping sleeve, and the latch on handle 2 is inserted into the opposite guide groove on the other side of the tapping sleeve.

7. The compound tapping device according to claim 6, characterized in that: The locking tooth includes a rotating shaft, a tooth body, a retaining spring and a tooth seat. The tooth seat is fixedly mounted on handle one or handle two. The tooth bodies are rotatably connected on both sides of the tooth seat through the rotating shaft. A retaining spring is installed between the tooth body and the tooth seat. The reset force of the retaining spring supports the tooth body to open relative to the tooth seat. The width of the tooth seat is smaller than the width of the connecting channel. When the tooth body is retracted into the tooth seat, it passes through the connecting channel and enters the adjacent guide groove.

8. The compound tapping device according to claim 1, characterized in that: A positioning sleeve is sleeved on the outer side of the cone, and distance scales are provided at corresponding positions on the outer sides of the cone and the tap wrench. The displacement of the cone and the tap wrench relative to the positioning sleeve during tapping operation is observed through the distance scale to monitor the tapping depth.

9. The working method of the composite tapping device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Before use, connect the cone with the cone teeth and the tap wrench with the handle and secure them with the pin. S2. The tapping sleeve has an arrow-shaped guide groove, and the handle has an arrow-shaped tooth. The rotation direction of the arrow tail is consistent with the tapping rotation direction, and the arrow head is opposite. When tapping, the handle is rotated. The tail of the tooth arrow collides with the guide groove, which drives the guide groove to rotate, and further drives the cone to rotate, thereby tapping. S3. After the operator rotates both hands 90 degrees, they directly reverse to the initial position. The arrow head of the clamping tooth collides with the inner bevel of the guide groove, driving the clamping tooth to compress the retaining spring. The rotating shaft rotates, thereby realizing the rotation of the clamping tooth through the bearing. The tapping sleeve does not move. Therefore, the tapping is performed by reciprocating 90 degrees. S4. When the tapping equipment is put into use and assembled, align the taper of the equipment with the circular hole to be processed and move it downward. During the process of the cone going deeper, check the contact between the end face of the positioning sleeve and the surface of the processed circular hole to determine whether the cone is vertical, thereby ensuring vertical tapping of the cone; S5. After confirming that the cone is tapping, use both hands to continuously move back and forth to drive the cone to rotate and tap continuously. If the tapping hole diameter is too large, change the grip length; S6. When tapping, observe the tapping depth by observing the measuring scale scale between the positioning sleeve and the tapping cone to ensure the tapping quality.

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