A drilling machine tapping fixture
By designing a fixing and protection mechanism for the tapping fixture of a drilling machine, the problems of workpiece displacement and chip splashing in the fixture were solved, achieving high-precision machining and operator safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING XINTONGYUE TECHNOLOGY CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-17
AI Technical Summary
In the prior art, the workpiece undergoes slight displacement or rotation in the fixture, which increases the coaxiality deviation between the tap and the pre-drilled hole. Furthermore, during the tapping process, the generated chips will fly out at a high speed, and the sharp chips will scratch the operator's skin.
A tapping fixture for a drilling machine was designed, comprising a fixing mechanism and a protective mechanism. The fixing mechanism is driven by a motor to rotate a gear, with the clamping block slidingly connected to the gear to ensure the workpiece is fixed; the protective mechanism is fixed by an arc-shaped frame and bolts to prevent chips from splashing.
It effectively prevents the workpiece from sliding or rotating under clamping force, ensuring machining accuracy, preventing chip splashing, and protecting operator safety.
Smart Images
Figure CN224508637U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drilling machine tapping technology, and in particular to a drilling machine tapping fixture. Background Technology
[0002] In mechanical manufacturing and assembly processes, drilling and tapping are two very basic and common operations. Drilling is the process of creating holes in a workpiece, while tapping is the process of creating internal threads on the inner walls of these holes. The presence of internal threads allows fasteners with external threads, such as bolts and screws, to be screwed into them, thereby achieving reliable connection, fixation, or adjustment between parts. Especially in the manufacturing process of standard fasteners such as nuts or special workpieces with internal threads, there are various devices and methods in the existing technology for tapping operations on workpieces. One common form is a manual tapping tool using a lever structure. This tool usually consists of a handle, a connecting part, and a tap clamping part. Its working principle is: the operator holds the handle, and the lever structure amplifies the applied hand force to generate sufficient axial feed force, pressing the rotating tap against the fixed workpiece, driving the tap to cut internal threads while rotating.
[0003] In the prior art, taps generate a large reaction force when cutting internal threads, and the workpiece is prone to slight displacement or rotation in the fixture, which leads to an increase in the coaxiality deviation between the tap and the pre-drilled hole. The resulting thread profile is irregular and the dimensions are inaccurate. In addition, during the tapping process, the generated chips will fly out at a high speed, and the sharp chips will cut the operator's skin, especially exposed areas such as hands and face. Therefore, a drilling machine tapping fixture is proposed to solve the above-mentioned problems. Utility Model Content
[0004] In order to solve the technical problems in the prior art, where the workpiece undergoes slight displacement or rotation in the fixture, resulting in an increased coaxiality deviation between the tap and the pre-drilled hole, and the chips generated during the tapping process are splashed out at high speed, and the sharp chips can scratch the operator's skin, this application provides a tapping fixture for a drilling machine.
[0005] The present invention discloses a tapping fixture for a drilling machine, comprising a tapping machine body, wherein a fixing mechanism is provided on the front surface of the tapping machine body, the fixing mechanism comprising a clamping block, and the movement of the clamping block fixing the workpiece.
[0006] The front surface of the tapping machine body is provided with a protective mechanism, which includes an arc-shaped frame that isolates machining spatter through its arc-shaped structure.
[0007] Preferably, the fixing mechanism further includes a motor, which is fixedly installed inside the processing platform of the tapping machine body, and the output shaft of the motor is rotatably connected to the inner groove of the processing platform of the tapping machine body through a bearing.
[0008] Through the above technical solution, the motor is fixedly installed on the tapping machine body. The output shaft of the motor is rotatably connected to the groove of the tapping machine body through the bearing, which ensures the stability of the rotation of the motor output shaft. The motor model can be a Panasonic A6 series servo motor, equipped with a matching driver. A reducer can be equipped according to actual needs to achieve precise control.
[0009] Preferably, the output shaft of the motor is fixedly mounted with a gear having multiple arc-shaped grooves, and the bottom end of the clamping block is slidably connected to the inner wall of the arc-shaped groove of the gear via a pin.
[0010] Through the above technical solution, the output shaft of the motor is fixedly installed with the gear, driving the gear to rotate. The clamping block is slidably connected to the arc groove of the gear through the pin, ensuring that the clamping block can slide with the rotation of the gear, thereby achieving reliable transmission. Both the gear and the clamping block can be made of alloy steel and undergo carburizing and quenching treatment, which results in high surface hardness and good wear resistance.
[0011] Preferably, the clamping block is slidably connected in the groove on the upper surface of the processing platform of the tapping machine body, and an anti-slip pad is fixedly adhered to the outer surface of the clamping block.
[0012] Through the above technical solution, the clamping block is slidably connected to the tapping machine body to limit its movement, allowing it to rotate from rotary motion to linear motion. The clamping block is fixedly bonded to the anti-slip pad, which not only fixes it but also facilitates disassembly. The anti-slip pad increases the friction coefficient between the clamping block and the workpiece contact surface, preventing the workpiece from sliding or rotating under clamping force or during tapping, thus ensuring processing accuracy. The adhesive can be selected according to actual needs, and the anti-slip pad can be made of polyurethane, which has good wear resistance, tear resistance, oil resistance, and a certain degree of elasticity.
[0013] Preferably, the protective mechanism further includes a bolt, the outer surface of which is threadedly connected to both the threaded hole on the circular plate surface of the arc-shaped frame and the threaded hole on the processing platform of the tapping machine body.
[0014] The above technical solution uses bolts to connect the outer surface of the bolts to the threaded holes on the circular plate surface of the arc frame and the threaded holes on the processing platform of the tapping machine body. This fixes the arc frame on the processing platform and facilitates disassembly. The arc frame prevents chips from flying out at high speeds and causing injury to workers. The bolts are also made of alloy steel and undergo carburizing and quenching treatment to ensure the stability of the connection.
[0015] Preferably, a wedge-shaped washer is placed between the head of the bolt and the shaft, the upper surface of the wedge-shaped washer is in contact with the lower surface of the circular plate of the arc-shaped frame, and an observation window is provided on the inner wall of the arc surface of the arc-shaped frame.
[0016] The above technical solution uses a wedge-shaped washer positioned between the bolt head and the shank, contacting the lower surface of the circular plate of the arc-shaped frame. Utilizing its wedge effect, the serrations on the wedge washer embed into the upper surface of the bolt when the bolt is tightened. The serrations in the middle mesh with each other, forming a wedge effect that prevents the bolt from rotating in any direction, thus preventing the arc-shaped frame from accidentally falling off and protecting the operator's safety. The wedge washer is also made of alloy steel and undergoes carburizing and quenching treatment. An observation window is provided on the arc-shaped frame, allowing operators or monitoring equipment to observe the tapping process and determine whether the tool is working properly, whether the cutting is smooth, and whether the workpiece is correctly positioned. The arc-shaped frame can be made of 304 stainless steel, and the observation window can be made of polycarbonate sheet, which has extremely high impact resistance, good weather resistance, and a certain degree of transparency.
[0017] The beneficial effects of this utility model are as follows: 1. By setting a fixing mechanism, the workpiece is fixed. The motor drives the gear to rotate. The clamping block is slidably connected to the gear through the arc groove of the pin shaft, ensuring that the clamping block can slide with the rotation of the gear. The clamping block is slidably connected to the tapping machine body, limiting its movement and causing it to rotate from rotation to linear motion. The anti-slip pad can increase the friction coefficient of the contact surface between the clamping block and the workpiece, preventing the workpiece from sliding or rotating under the action of clamping force or during tapping, ensuring machining accuracy. This solves the technical problem in the prior art that when the tap is cutting internal threads, it will generate a large reaction force, and the workpiece is prone to slight displacement or rotation in the fixture, which will lead to an increase in the coaxiality deviation between the tap and the pre-drilled hole, resulting in irregular thread profile and inaccurate dimensions.
[0018] 2. By setting up a protective mechanism, processing spatter is isolated. The outer surface of the bolt is simultaneously threaded to the threaded hole on the circular plate surface of the arc frame and the threaded hole on the processing platform of the tapping machine body, fixing the arc frame to the processing platform. The wedge-shaped washer is located between the head and the shank of the bolt and contacts the lower surface of the circular plate of the arc frame. The wedge-shaped washer uses its wedge effect to prevent the bolt from rotating in any direction, thereby preventing the arc frame from accidentally falling off. The arc frame can prevent chips from flying out at high speed and causing injury to workers. An observation window is set on the arc frame, allowing operators or monitoring equipment to observe the tapping process. This solves the technical problem that chips generated during tapping will fly out at high speed and the sharp chips will scratch the operator's skin, especially exposed areas such as hands and face. Attached Figure Description
[0019] Figure 1This is a schematic diagram of a drilling machine tapping fixture proposed in this utility model; Figure 2 This is a perspective view of the clamping block structure of a drilling machine tapping fixture proposed in this utility model; Figure 3 This is a perspective view of the observation window structure of a drilling machine tapping fixture proposed in this utility model; Figure 4 This is a perspective view of the anti-slip pad structure of a drilling machine tapping fixture proposed in this utility model; Figure 5 This is a perspective view of the gear structure of a drilling machine tapping fixture proposed in this utility model.
[0020] In the diagram: 1. Tapping machine body; 2. Motor; 3. Gear; 31. Clamping block; 4. Anti-slip pad; 5. Bolt; 51. Arc frame; 6. Wedge gasket; 61. Observation window. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0022] Reference Figures 1-5 A tapping fixture for a drilling machine includes a tapping machine body 1. A fixing mechanism is provided on the front surface of the tapping machine body 1. The fixing mechanism includes a clamping block 31. The movement of the clamping block 31 fixes the workpiece.
[0023] To ensure the stability of the output shaft rotation of motor 2, the fixing mechanism also includes motor 2. Motor 2 is fixedly installed inside the processing platform of the tapping machine body 1. The output shaft of motor 2 is rotatably connected to the inner groove of the processing platform of the tapping machine body 1 through bearings. By fixing motor 2 to the tapping machine body 1, the output shaft of motor 2 is rotatably connected to the inner groove of the tapping machine body 1 through bearings, ensuring the stability of the output shaft rotation of motor 2. The model of motor 2 can be Panasonic A6 series servo motor 2, equipped with a matching driver. A reducer can be equipped according to actual needs to achieve precise control.
[0024] To drive the gear 3 to rotate, the output shaft of the motor 2 is fixedly mounted with the gear 3, which has multiple arc-shaped grooves. The bottom end of the clamping block 31 is slidably connected to the inner wall of the arc-shaped groove of the gear 3 through a pin. The output shaft of the motor 2 is fixedly mounted with the gear 3 to drive the gear 3 to rotate. The clamping block 31 is slidably connected to the arc-shaped groove of the gear 3 through a pin to ensure that the clamping block 31 can slide with the rotation of the gear 3, thereby achieving reliable transmission. Both the gear 3 and the clamping block 31 can be made of alloy steel and undergo carburizing and quenching treatment, which results in high surface hardness and good wear resistance.
[0025] To increase the friction coefficient between the clamping block 31 and the workpiece contact surface, the clamping block 31 is slidably connected to the groove on the upper surface of the processing platform of the tapping machine body 1. An anti-slip pad 4 is fixedly bonded to the outer surface of the clamping block 31. The clamping block 31 is slidably connected to the tapping machine body 1, limiting its movement and allowing it to rotate from rotation to linear motion. The clamping block 31 is fixedly bonded to the anti-slip pad 4, which not only fixes it but also facilitates disassembly. The anti-slip pad 4 can increase the friction coefficient between the clamping block 31 and the workpiece contact surface, preventing the workpiece from sliding or rotating under clamping force or during tapping, thus ensuring processing accuracy. The adhesive can be selected according to actual needs. The anti-slip pad 4 can be made of polyurethane, which has good wear resistance, tear resistance, oil resistance and a certain degree of elasticity.
[0026] By setting a fixing mechanism, the workpiece is fixed. The motor 2 drives the gear 3 to rotate. The clamping block 31 is slidably connected to the arc groove of the gear 3 through a pin, ensuring that the clamping block 31 can slide with the rotation of the gear 3. The clamping block 31 is slidably connected to the tapping machine body 1, limiting its movement and causing it to rotate from rotation to linear motion. The anti-slip pad 4 can increase the friction coefficient between the clamping block 31 and the workpiece contact surface, preventing the workpiece from sliding or rotating under the action of clamping force or during tapping, ensuring machining accuracy. This solves the technical problem in the prior art that when the tap is cutting internal threads, it will generate a large reaction force, and the workpiece is prone to slight displacement or rotation in the fixture, which leads to an increase in the coaxiality deviation between the tap and the pre-drilled hole, resulting in irregular thread profile and inaccurate dimensions.
[0027] In order to isolate the machining spatter, a protective mechanism is provided on the front surface of the tapping machine body 1. The protective mechanism includes an arc-shaped frame 51, which isolates the machining spatter through its arc-shaped structure.
[0028] To prevent chips from flying out at high speed and causing injury to workers, the protective mechanism also includes bolts 5. The outer surface of bolts 5 is threadedly connected to the threaded holes on the circular plate surface of the arc frame 51 and the threaded holes on the processing platform of the tapping machine body 1. By connecting the outer surface of bolts 5 to the threaded holes on the circular plate surface of the arc frame 51 and the threaded holes on the processing platform of the tapping machine body 1, the arc frame 51 is fixed to the processing platform and is easy to disassemble. The arc frame 51 can prevent chips from flying out at high speed and causing injury to workers. The bolts 5 are also made of alloy steel and have undergone carburizing and quenching treatment to ensure the stability of the connection.
[0029] To prevent the arc frame 51 from accidentally falling off, a wedge-shaped washer 6 is placed between the head and the shaft of the bolt 5. The upper surface of the wedge-shaped washer 6 contacts the lower surface of the circular plate of the arc frame 51. An observation window 61 is provided on the inner wall of the arc surface of the arc frame 51. The wedge-shaped washer 6 is located between the head and the shaft of the bolt 5 and contacts the lower surface of the circular plate of the arc frame 51. Utilizing its wedge effect, when the bolt 5 is tightened, the serrations on the wedge-shaped washer 6 embed into the upper surface of the bolt 5. The serrations in the middle mesh with each other, forming a wedge effect that prevents the bolt 5 from rotating in any direction, thus preventing the arc frame 51 from accidentally falling off and protecting the operator's safety. The wedge-shaped washer 6 is also made of alloy steel and undergoes carburizing and quenching treatment. The observation window 61 on the arc frame 51 allows the operator or monitoring equipment to observe the tapping process and determine whether the tool is working properly, whether the cutting is smooth, and whether the workpiece is correctly positioned. The arc frame 51 can be made of 304 stainless steel. Stainless steel, the observation window 61 can be made of polycarbonate sheet, which has extremely high impact resistance, good weather resistance and a certain degree of transparency.
[0030] By setting up a protective mechanism to isolate processing spatter, the outer surface of the bolt 5 is simultaneously threadedly connected to the threaded hole on the circular plate surface of the arc frame 51 and the threaded hole on the processing platform of the tapping machine body 1, fixing the arc frame 51 to the processing platform. The wedge-shaped washer 6 is located between the head and the body of the bolt 5 and contacts the lower surface of the circular plate of the arc frame 51. The wedge-shaped washer 6 uses its wedge effect to prevent the bolt 5 from rotating in any direction, thereby preventing the arc frame 51 from accidentally falling off. The arc frame 51 can prevent chips from flying out at high speed and causing injury to workers. An observation window 61 is provided on the arc frame 51, allowing operators or monitoring equipment to observe the tapping process. This solves the technical problem that during the tapping process, chips generated will fly out at high speed, and sharp chips will scratch the operator's skin, especially exposed areas such as hands and face.
[0031] Working principle: When processing a workpiece, the operator places the workpiece at a designated position on the processing platform of the tapping machine body 1. The control system sends a command to the servo driver to start the motor 2. The motor 2 rotates forward, driving the gear 3 to rotate, which in turn drives the clamping block 31, which is slidably connected to the arc groove via a pin, to move on the processing platform of the tapping machine body 1, thereby fixing the workpiece. The anti-slip pad 4 on the clamping block 31 contacts the workpiece, increasing the friction coefficient between the clamping block 31 and the workpiece contact surface, preventing the workpiece from sliding or rotating under clamping force or during tapping, thus ensuring processing accuracy. Since the center of gear 3 and the center of tap of tapping machine body 1 are on the same Y-axis, the tap is aligned with the center pre-drilled hole on the workpiece. At this time, the rotation of the tap is driven by the motor 2 of tapping machine body 1. Then the operator manually controls the handle to raise and lower, slowly press the tap down into the pre-drilled hole, and at the same time keep the tap rotating. The tap begins to cut the internal thread. The spatter generated during the cutting process is isolated by the arc frame 51. The operator can clearly see the tapping process through the observation window 61 and judge whether the tap is deflected, whether the cutting is smooth, and whether there are abnormal sounds or vibrations. The arc frame 51 is firmly fixed to the processing platform by bolts 5 and wedge-shaped washers 6, thereby preventing the arc frame 51 from falling off accidentally and protecting the safety of the operator. A TML series strain gauge sensor can be installed near the tapping machine body 1 or the tap to monitor the cutting force / torque during the tapping process. When the force / torque exceeds the preset threshold, it will prompt the operator to adjust the feed or stop the tapping process. After the operator finishes tapping a hole, they manually lift the tap away from the workpiece. Once it is confirmed that the tapping is complete and the tap has left the workpiece, the control system sends a reverse motion command to the servo driver. Motor 2 reverses, drives the clamping block 31 to move in the reverse direction, releases the workpiece, and the operator removes the processed workpiece. The above steps are repeated to prepare for the processing of the next workpiece. Regularly check the wear of the anti-slip pad 4 of clamping block 31. Replace it if the wear is severe. Check if the wedge-shaped gasket 6 is deformed or damaged. Check if the bolt 5 is loose. Check if the gear 3, pin, and clamping block 31 are excessively worn or damaged. Check if the bearing runs smoothly and if there are any abnormal noises. Replace worn or damaged parts in time according to the inspection results. When replacing, pay attention to using spare parts of the same specifications and materials. In particular, key transmission components such as gear 3, pin, and clamping block 31 should be kept in the same material and heat treatment state. Regularly check if the motor 2, servo driver, sensor, and wiring connections are normal and if there are any loose, broken, or aging phenomena. Depending on the frequency of use, lubricate the connection between gear 3 and pin, the sliding groove of clamp 31, and the bearings regularly with appropriate grease. If there are parts of the manual tap lifting mechanism that require lubrication, they should also be lubricated as required.
[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A tapping tool jig for a drilling machine, comprising a tapping machine body (1), characterized in that: The front surface of the tapping machine body (1) is provided with a fixing mechanism, which includes a clamping block (31). The movement of the clamping block (31) fixes the workpiece. The front surface of the tapping machine body (1) is provided with a protective mechanism, which includes an arc frame (51) that isolates the processing spatter through its arc structure.
2. The tapping fixture of claim 1, wherein: The fixing mechanism also includes a motor (2), which is fixedly installed inside the processing platform of the tapping machine body (1). The output shaft of the motor (2) is rotatably connected to the inner groove of the processing platform of the tapping machine body (1) through a bearing.
3. The tapping fixture of claim 2 wherein: The output shaft of the motor (2) is fixedly mounted with a gear (3) having multiple arc-shaped grooves. The bottom end of the clamping block (31) is slidably connected to the inner wall of the arc-shaped groove of the gear (3) through a pin.
4. The tapping fixture of claim 3 wherein: The clamping block (31) is slidably connected in the groove on the upper surface of the processing platform of the tapping machine body (1), and an anti-slip pad (4) is fixedly bonded to the outer surface of the clamping block (31).
5. The tapping fixture of claim 1 wherein: The protective mechanism also includes a bolt (5), the outer surface of which is threadedly connected to the threaded hole on the circular plate surface of the arc frame (51) and the threaded hole on the processing platform of the tapping machine body (1).
6. The tapping fixture of claim 5 wherein: A wedge-shaped washer (6) is placed between the head of the bolt (5) and the rod body. The upper surface of the wedge-shaped washer (6) contacts the lower surface of the circular plate of the arc frame (51). An observation window (61) is provided on the inner wall of the arc surface of the arc frame (51).