CN116512013A - Screw tap thread grinder with trimming mechanism - Google Patents

Abstract

The application discloses a tap thread grinding machine with a trimming mechanism, which belongs to the technical field of electric discharge machining, and the key point of the technical solution is a tap thread grinding machine with a trimming mechanism, including a workbench and a clamping mechanism connected to the workbench , a protective shell connected to the worktable, a grinding device connected to the protective shell, a feed mechanism for moving the tap along its axis, and a moving mechanism for moving the tap along its axis perpendicular to the axis are arranged between the worktable and the clamping mechanism, The moving mechanism is connected to the workbench, the bottom of the feeding mechanism is connected to the moving mechanism, the protective shell is provided with a clamping mechanism, a moving mechanism and a feeding mechanism, and the grinding device includes a grinding wheel for grinding taps and a first driving member for driving the grinding wheel to rotate. The first driving part is connected with the protective shell, its drive shaft is connected with the grinding wheel, the protective shell is connected with a dressing device for dressing the grinding wheel, and the dressing device is connected with the grinding wheel, so as to achieve the effect of improving work efficiency.

Description

A tap thread grinding machine with a trimming mechanism

technical field

The present application relates to the technical field of electric discharge machining, in particular to a tap thread grinding machine with a trimming mechanism.

Background technique

At present, the EDM machine tool is a special processing machine tool that uses the principle of EDM to process conductive materials. The EDM machine tool is mainly used for processing various high-hardness materials (such as diamond, hard alloy and quenched steel, etc.) Molds, parts, and tools for cutting, grooving, and removing breaks in workpiece holes (such as drills and taps), etc.

In the related art, the existing Chinese patent announcement number is CN209936055U, which discloses a four-axis CNC electric spark sharpener. The C-axis device is displaced along its direction, and one side of the Y-axis device is connected with the Z-axis device, and the Z-axis device is displaced along its direction with the axial movement of the Y-axis device; the upper part of the base is flexibly connected along the X-axis axial movement direction There is a workbench, the upper side of the workbench is fixedly connected with a C-axis device, the other side is fixedly connected with a turning tool holder, the top of the turning tool holder is connected with a turning tool, and the bottom of the C-axis device is rotatably connected There is an indexing plate base, the indexing plate base is set between the C-axis device and the workbench and fixedly connected to the workbench; the upper and outer sides of the base are connected to a beam, and one side of the beam corresponds to the upper side of the C-axis device along the Y A sliding seat is movably connected in the axial movement direction of the shaft, and the other side of the sliding seat is movably connected with a slide plate along the axial movement direction of the Z-axis. One side of the slide plate is connected with a lifting seat, and a spindle kit is connected through the lifting seat. The spindle set is arranged under the Z-axis device, a probe is connected to the bottom of the spindle set, and the test end of the probe faces the tool side. By adopting the principle of high-voltage discharge corrosion processing, using the gap between the positive and negative electrodes to generate high-voltage sparks, the high temperature will melt and remove the conductive binder, and at the same time, the high temperature will carbonize the diamond surface to achieve the effect of removing PCD and polycrystalline diamond. It achieves higher processing efficiency.

In view of the above-mentioned related technologies, the inventor believes that in order to achieve higher processing efficiency of the grinding wheel, the grinding wheel needs to be removed in the above-mentioned technology, and then the grinding wheel is placed on the electric spark grinder for dressing the grinding wheel, and the operation process of the staff is relatively cumbersome. , reducing work efficiency.

Contents of the invention

In order to improve work efficiency, the invention provides a tap thread grinding machine with a trimming mechanism.

A tap thread grinding machine with a trimming mechanism provided by the present invention adopts the following technical scheme:

A tap thread grinder with a trimming mechanism, comprising a workbench, a clamping mechanism connected to the workbench, a protective case connected to the workbench, a grinding device connected to the protective case, the working A feeding mechanism for moving the tap along its axis and a moving mechanism for moving the tap along its axis perpendicular to the clamping mechanism are provided between the table and the clamping mechanism. The moving mechanism is connected to the worktable, and the bottom of the feeding mechanism Connected with the moving mechanism, the protective shell covers the clamping mechanism, the moving mechanism and the feeding mechanism, the grinding device includes a grinding wheel for grinding taps, a first wheel for driving the grinding wheel to rotate A driving member, the first driving member is connected to the protective case, and its drive shaft is connected to the grinding wheel, the protective case is connected to a dressing device for dressing the grinding wheel, and the dressing device is connected to the grinding wheel.

By adopting the above technical scheme, the tap is first clamped by the clamping mechanism, and then the first driving member is started to rotate the grinding wheel, and then the moving mechanism is started to move the holding mechanism along the axis of the vertical tap, so that the tap is close to the grinding wheel, and the feed is started The mechanism makes the clamping mechanism move along the axis direction of the tap, and through the cooperation of the feeding mechanism and the moving mechanism, the grinding wheel grinds the thread of the tap; after the grinding wheel is used for a long time, the grinding wheel needs to be trimmed, and the dressing device is started to trim the grinding wheel. There is no need to disassemble and install the grinding wheel on the electric spark grinder for dressing, and the dressing device can be started directly, which reduces the number of operating procedures for staff and improves work efficiency.

Preferably, the grinding device further includes a rotating shaft arranged between the grinding wheel and the first driving member, the two ends of the rotating shaft are respectively connected with the first driving member and the grinding wheel, and the dressing The device includes a second driving member connected with the protective case, a rotating shaft connected with the second driving member, a thread rolling wheel sleeved on the rotating shaft and fixedly connected with the rotating shaft, two The first brush connected to the rotating shaft, the second brush connected to the grinding wheel, the first brush and the second brush are both connected to the protective shell, the two first brushes The brushes are all connected to one pole of the power supply, the second brush is connected to the other pole of the power supply, the groove formed between the adjacent teeth of the rolling wheel matches the blade of the grinding wheel, and the The blade portion of the grinding wheel is located between adjacent teeth of the thread rolling wheel, and there is a gap between the grinding wheel and the thread rolling wheel.

By adopting the above-mentioned technical scheme, start the first driving part, the first driving part drives the rotating shaft to rotate, when the grinding wheel needs to be trimmed, start the second driving part at the same time, the second driving part drives the rotating shaft to rotate, the rotating shaft drives the grinding wheel to rotate, The shaft drives the thread rolling wheel to rotate, so that the rotation speed of the thread rolling wheel matches the rotation speed of the grinding wheel, and then turn on the power, the first electric brush electrifies the thread rolling wheel, and the second electric brush electrifies the grinding wheel, so that the distance between the thread rolling wheel and the grinding wheel High-voltage sparks are generated between them, and the conductive binder is melted and removed at high temperature. At the same time, the high temperature carbonizes the diamond surface to achieve the effect of removing polycrystalline diamond.

Preferably, the protective case includes a casing connected to the workbench, a door connected to the casing, the door includes two fixing blocks connected to the casing, and the fixing blocks pass through the The door shaft of the block, two connecting blocks fixedly connected with the door shaft, and the revolving door connected with the connecting block, the two fixed blocks are located between the two connecting blocks, and one of the fixed blocks is connected with the two connecting blocks. One of the connecting blocks is lowered, the other of the fixing blocks abuts against the other of the connecting blocks, the housing is connected with a placement plate for shelving waste materials, and is connected with a cleaning component for cleaning the placement plate. The placing plate is located under the grinding wheel, and the bottom of the door shaft is connected with a control device for controlling the movement of the cleaning assembly.

By adopting the above technical scheme, the holding mechanism, moving mechanism, grinding wheel, etc. are arranged in the casing, which increases the safety of the staff; when the tap is ground, more waste will be generated, and when the grinding wheel is trimmed, it will also A lot of waste chips are generated, and the waste chips all fall onto the placement plate, and then when the revolving door is opened or closed, the revolving door drives the door shaft to rotate, and the door shaft rotates to drive the control device to move, and the control device controls the cleaning component to clean the placement plate waste and restore it to its original position.

Preferably, the placement plate includes an inclined part and a horizontal part, the inclined part is connected with the horizontal part, and it is inclined downward from an end far away from the horizontal part, and the inclined part is located under the grinding wheel, so The horizontal part is located above the feeding mechanism, and both ends of the horizontal part are connected with the housing, and the horizontal part is connected with the cleaning assembly.

By adopting the above technical scheme, the waste chips generated when dressing the grinding wheel first fall to the inclined part, and then fall to the horizontal part, which facilitates the cleaning of the cleaning components.

Preferably, the clamping mechanism includes a clamping device that clamps the tap and drives the tap to rotate, and a cylinder at the tip of the tap, the width of the horizontal part is smaller than the distance between the clamping device and the cylinder, and ensures that the The above-mentioned feed mechanism moves normally.

By adopting the above technical scheme, the distance between the horizontal part and the clamping device can be used for the feed mechanism to move along the axial direction of the tap, ensuring the normal operation of the feed mechanism, so that the tap can move in the axial direction and cooperate with the grinding wheel to complete Grinding threads.

Preferably, the cleaning assembly includes a limit block sleeved on the horizontal part, a cleaning brush abutting against the top of the horizontal part, the limit block is slidably connected with the horizontal part, and the limit block A cleaning hole for placing the cleaning brush is opened on the top of the block, and both ends of the cleaning brush are connected with the limiting block.

By adopting the above technical solution, when the revolving door is opened, the door shaft drives the control device to move, the control device drives the limit block to slide on the horizontal part toward the outside, the limit block drives the cleaning brush to move, and the cleaning brush cleans the waste to the horizontal The end close to the outside is convenient for the staff to collect; when the revolving door is closed, on the contrary, the movement of the door shaft drives the movement of the control device, and the movement of the control device makes the cleaning brush return to its original position.

Preferably, the cleaning brush is arranged obliquely near the side wall of the inclined portion, and the angle of inclination matches the angle of inclination of the inclined portion, the cleaning brush abuts against the inclined portion, and the top surface of the cleaning brush It is arranged obliquely, and is inclined downward from a side close to the inclined portion, and the inclination angle of the top of the cleaning brush is smaller than the inclination angle of the inclined portion.

By adopting the above technical scheme, the scraps fall when the grinding wheel is trimmed. Since the top surface of the cleaning brush is inclined, and the side wall near the inclined portion abuts against the inclined portion, the scraps will all fall to the horizontal portion. There will not be much debris left at the connection between the upper part and the horizontal part. During the movement of the cleaning brush, the debris will be cleaned to the side of the placement plate close to the outside, which is convenient for the staff to clean and collect.

Preferably, the control device includes a connecting rod rotatably connected to the housing, a main gear fixedly connected to the connecting rod, a pinion gear meshed with the main gear, a threaded rod connected to the pinion gear, A linkage assembly that drives the connecting rod and the door shaft to move synchronously. The linkage assembly is a belt and a pulley. The axes of one pulley, the connecting rod, and the main gear are all coincident. The housing is provided, and both ends of the housing are rotatably connected to the housing, and the threaded rod passes through the limiting block and is threadedly connected to the limiting block.

By adopting the above technical solution, when the revolving door is opened, the rotation of the door shaft drives one pulley to rotate, one pulley drives the other pulley to rotate through the belt, the other pulley drives the connecting rod to rotate, the connecting rod drives the main gear to rotate, and the main gear drives the auxiliary gear to rotate , the auxiliary gear drives the threaded rod to rotate, the threaded rod drives the limit block to slide on the horizontal part of the placement plate, the limit block drives the cleaning brush to move, and the cleaning brush cleans the waste to the side close to the outside, which is convenient for the staff to collect and clean.

In summary, the present invention has the following beneficial effects:

1. When the working efficiency of the grinding wheel is not high when processing taps, it is necessary to trim the grinding wheel, start the first driving part and the second driving part, turn on the power supply, and make the first electric brush and the second electric brush energized, so that the grinding wheel There is an electric spark between the roller and the grinding wheel to dress the grinding wheel. It is not necessary for the staff to disassemble and install the grinding wheel to the electric spark grinder for dressing, and the dressing device can be started directly, which reduces the number of operations for the staff and improves work efficiency. .

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a tap thread grinding machine with a trimming mechanism.

Fig. 2 is a schematic diagram of the overall structure of the trimming device.

Fig. 3 is a schematic diagram of the overall structure of the placement board.

FIG. 4 is an enlarged structural schematic diagram of part A in FIG. 3 .

Explanation of reference signs:

1. Workbench; 11. Clamping mechanism; 12. Moving mechanism; 13. Feeding mechanism; 2. Protective shell; 21. Shell; 22. Door body; 221. Fixed block; 222. Door shaft; 223. Connection Block; 224, revolving door; 3, cooling device; 4, grinding device; 41, the first motor; 42, rotating shaft; 43, emery wheel; 5, dressing device; 51, the second motor; 52, rotating shaft; Thread rolling wheel; 54, first electric brush; 55, second electric brush; 6, control device; 61, linkage assembly; 62, connecting rod; 63, main gear; 64, secondary gear; 65, threaded rod; 7, Placement plate; 71, inclined part; 72, horizontal part; 8, cleaning component; 81, limit block; 811, cleaning hole; 82, cleaning brush.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

A tap thread grinding machine with a trimming mechanism, referring to Figure 1 and Figure 2, includes a workbench 1, a clamping mechanism 11, a grinding device 4 and a trimming device 5, the clamping mechanism 11 is connected to the workbench 1 for clamping To hold the tap, a moving mechanism 12 and a feeding mechanism 13 are arranged between the clamping mechanism 11 and the worktable 1. The moving mechanism 12 is driven by a linear motor, and the linear motor is fixedly connected to the worktable 1 to drive the tap on its vertical axis. The direction of movement is close, the feed mechanism 13 is fixedly connected with the linear motor, used to drive the tap to move in the direction of its axis, the feed mechanism 13 is fixedly connected with the clamping mechanism 11, and the workbench 1 is fixedly connected with the protective shell 2, The grinding device 4 is connected with the protective shell 2, and is used for grinding the thread of the tap. The dressing device 5 is connected with the protective shell 2 and the grinding device 4, and is used for dressing the grinding device 4, and the grinding device 4 grinds the tap. When efficiency is low, can directly open dressing device 5 pairs of emery wheels 43 dressing after grinding tap, has greatly improved work efficiency.

1 and 2, the protective case 2 includes a housing 21 and a door body 22, the clamping mechanism 11, the moving mechanism 12, the feeding mechanism 13, the grinding device 4 and the trimming device 5 are all located inside the housing 21, and the housing One side wall of 21 is provided with an opening.

Referring to Fig. 1, the door body 22 includes a fixed block 221, a connecting block 223, a door shaft 222 and a revolving door 224, two fixed blocks 221 are provided, and the two fixed blocks 221 are fixedly connected with the housing 21 and distributed vertically, The door shaft 222 is vertically arranged, and it passes through the fixed block 221, and is connected with the fixed block 221 in rotation. There are two connecting blocks 223, and the two connecting blocks 223 are fixedly connected with the door shaft 222, and the two fixed blocks 221 are located at Between the two connecting blocks 223, and the top of a fixed block 221 abuts against the bottom of a connecting block 223, the bottom of the other fixing block 221 abuts against the top of another connecting block 223, and the revolving door 224 is vertically arranged, and it abuts against the connecting block 223 top. 223 is fixedly connected and covers the opening of the housing 21 .

The clamping mechanism 11, the linear motor, the feeding mechanism 13, the grinding device 4 and the trimming device 5 are displaced in the casing 21, which improves the safety of the staff.

Referring to Fig. 1 and Fig. 2, the grinding device 4 includes a first driving member and a grinding wheel 43 connected to the housing 21. In order to achieve the same purpose, the first driving member can be selected from the first electric motor 41 and hydraulic motor, and the present embodiment selects the first A motor 41, the first motor 41 is fixedly connected with the workbench 1, its drive shaft is fixedly connected with a rotating shaft 42, the rotating shaft 42 is horizontally arranged, and the grinding wheel 43 is vertically arranged, and it is fixedly connected with the rotating shaft 42.

Start the first motor 41, the first motor 41 drives the rotating shaft 42 to rotate, and the rotating shaft 42 drives the emery wheel 43 to rotate, and the emery wheel 43 rotates for grinding taps, and the emery wheel 43 cooperates with the feed mechanism 13, the moving mechanism 12, and the clamping mechanism 11 to realize Grinding of tap threads. In this embodiment, the grinding wheel 43 is made of diamond.

With reference to Fig. 1 and Fig. 2, finishing device 5 comprises second driving member, rotating shaft 52, thread rolling wheel 53, first electric brush 54 and second electric brush 55, in order to achieve the same purpose, second driving member can select second The motor 51 and the hydraulic motor, the second motor 51 is selected in this embodiment, the second motor 51 is fixedly connected with the housing 21, the rotating shaft 52 is arranged horizontally, and it is fixedly connected with the drive shaft of the second motor 51.

Referring to Fig. 2, the thread rolling wheel 53 is sleeved on the rotating shaft 52, and is fixedly connected with the rotating shaft 52, the groove formed between the adjacent teeth of the thread rolling wheel 53 matches the blade portion of the grinding wheel 43, and the blade of the grinding wheel 43 The part is located in the groove, and there is a gap with the thread rolling wheel 53 .

Referring to Fig. 2, there are two first brushes 54, the first brushes 54 are connected with a support frame, the support frame is fixedly connected with the housing 21, the two brushes are in contact with the circumferential surface of the rotating shaft 52, and both One pole of the power supply of the first brush 54 is electrically connected, the second brush 55 is fixedly connected with the housing 21, and it abuts against the side wall of the grinding wheel 43, and the second brush 55 is electrically connected with the other pole of the power supply.

Start the first driving part, the first driving part drives the rotating shaft 42 to rotate, when the emery wheel 43 needs to be trimmed, start the second driving part simultaneously, the second driving part drives the rotating shaft 52 to rotate, the rotating shaft 42 drives the emery wheel 43 to rotate, and the rotating shaft 52 drives the thread rolling wheel 53 to rotate so that the rotational speed of the thread rolling wheel 53 matches the rotational speed of the grinding wheel 43, and then the power is turned on, the first electric brush 54 electrifies the thread rolling wheel 53, and the second electric brush 55 electrifies the emery wheel 43. High-voltage sparks are generated between the thread rolling wheel 53 and the grinding wheel 43, and the conductive adhesive is melted and removed at high temperature. At the same time, the high temperature carbonizes the diamond surface to achieve the effect of removing polycrystalline diamond, and completes the trimming of the grinding wheel 43.

Referring to FIG. 1 , the clamping mechanism 11 includes a clamping device for clamping the tap, an air cylinder for the tip of the tap, and a hydraulic motor is fixedly connected with the clamping device. The clamping mechanism 11 is fixedly connected with a cooling device 3, and the cooling device 3 is arranged close to the tap. In this embodiment, oil cooling is used.

Referring to Fig. 1 and Fig. 2, the housing 21 is provided with a placement plate 7, the placement plate 7 includes an inclined portion 71 and a horizontal portion 72, one end of the inclined portion 71 is fixedly connected to the horizontal portion 72, and the side away from the horizontal portion 72 Inclined downward, the two side walls in the width direction of the inclined portion 71 are fixedly connected to the inner wall of the housing 21, and both ends of the horizontal portion 72 are fixedly connected to the inner wall of the housing 21, and its width is smaller than that of the first cylinder and the clamping device The distance between them, and ensure that the movement of the feed mechanism 13 is not hindered.

When grinding the screw tap, more waste chips can be produced, and when dressing the emery wheel 43, more waste chips will also be produced, and the waste chips all fall on the placement plate 7; It falls on the inclined portion 71 first, and then falls on the horizontal portion 72 .

3 and 4, the door shaft 222 is fixedly connected with the control device 6, the control device 6 includes a linkage assembly 61, a connecting rod 62, a main gear 63, a pinion gear 64 and a threaded rod 65, and the linkage assembly 61 can use a sprocket chain to cooperate , belt and pulley cooperation, etc., the present embodiment selects the belt and pulley to cooperate, and the connecting rod 62 is arranged vertically, and it is connected with the housing 21 in rotation, and the pulley is horizontally provided with two, and it is fixedly connected with the bottom end of door shaft 222, and another One pulley is fixedly connected with the connecting rod 62, and the belt is sheathed on the two pulleys and abuts against the two pulleys.

Referring to Fig. 3 and Fig. 4, the main gear 63 is arranged horizontally, and it is fixedly connected with the connecting rod 62, and the axes of the main gear 63, the connecting rod 62, and the belt pulley are all coincident, and the auxiliary gear 64 is arranged vertically, and it meshes with the main gear 63 , the pinion gear 64 is connected with the threaded rod 65 , the threaded rod 65 passes through the housing 21 , both ends are rotatably connected with the housing 21 , and the threaded rod 65 is located below the horizontal portion 72 .

When opening or closing the revolving door 224, the door shaft 222 rotates to drive a pulley to rotate, and a pulley drives the other pulley to rotate through the belt, and the other pulley drives the connecting rod 62 to rotate, and the connecting rod 62 drives the main gear 63 to rotate, and the main gear 63 drives the secondary The gear 64 rotates, and the pinion gear 64 drives the threaded rod 65 to rotate.

3 and 4, a cleaning assembly 8 is connected to the horizontal portion 72, the cleaning assembly 8 includes a limiting block 81 and a cleaning brush 82, the limiting block 81 is in the shape of a cuboid, which is sleeved on the horizontal portion 72, and is aligned with the horizontal Part 72 is slidingly connected, and the limiting block 81 is sleeved on the threaded rod 65, and is threadedly connected with the threaded rod 65. The top surface of the limiting block 81 is provided with a cleaning hole vertically, and the cleaning brush 82 is positioned in the cleaning hole, and the cleaning brush Both ends of the 82 are fixedly connected with the limit block 81 .

The threaded rod 65 rotates to drive the stop block 81 to slide on the horizontal part 72, and the stop block 81 drives the cleaning brush 82 to move, and the cleaning brush 82 cleans up the waste on the horizontal part 72 to the side of the horizontal part 72 close to the outside, which is convenient Workers clean up debris. When the revolving door 224 is opened to the maximum, the threaded rod 65 moves to the side close to the outside with the rotation limiting block 81 , and the side wall of the limiting block 81 is flush with the side wall of the horizontal portion 72 .

Referring to Fig. 3 and Fig. 4, the side wall of the cleaning brush 82 is arranged obliquely, and the inclination angle of the side wall matches the inclined part 71, the side wall of the cleaning brush 82 abuts against the inclined part 71, and the top surface of the cleaning brush 82 is arranged obliquely, And the inclination angle of the top surface is smaller than the inclination angle of the inclined portion 71 . There will not be much debris remaining at the connection between the inclined portion 71 and the horizontal portion 72 , and the cleaning brush 82 will clean all the debris to the side of the placement plate 7 close to the outside during the movement.

The application principle of the present application is as follows: start the first motor 41, the first motor 41 drives the rotating shaft 42 to rotate, the rotating shaft 42 drives the grinding wheel 43 to rotate, the feed mechanism 13, the moving mechanism 12, the clamping mechanism 11 and the grinding wheel 43 cooperate to realize the tap Grinding of threads;

When the working efficiency of emery wheel 43 is low, start the second motor 51, make the rotational speed of thread rolling wheel 53 cooperate with the rotational speed of emery wheel 43, start power supply, make the first electrode, the second electrode all electrification, make emery wheel 43 and roller Electricity is charged between the wire wheels 53 and electric sparks are generated to realize the dressing of the grinding wheel 43;

When correcting the grinding wheel 43 and grinding taps, a lot of waste chips will be generated, and these waste chips will all fall on the horizontal part 72 of the placement plate 7. When the staff opens the revolving door 224, the door shaft 222 drives the linkage device to move , the linkage device drives the connecting rod 62 to move, the connecting rod 62 drives the main gear 63 to rotate, the main gear 63 drives the secondary gear 64 to rotate, the secondary gear 64 drives the threaded rod 65 to rotate, and the threaded rod 65 rotates to make the limit block 81 on the horizontal part 72 Sliding, the limit block 81 moves with the cleaning brush 82, and the cleaning brush 82 cleans the waste to the end of the horizontal part 72 close to the outside, which is convenient for the staff to clean up and reduces the workload of the staff.

The embodiments of this specific implementation mode are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the present invention should be covered by within the protection scope of the present invention.

Claims (8)

1. A tap thread grinding machine with a trimming mechanism, characterized in that: comprising a workbench (1), a clamping mechanism (11) connected to the workbench (1), connected to the workbench (1) The protective shell (2), the grinding device (4) connected with the protective shell (2), and a screw tap is arranged between the worktable (1) and the clamping mechanism (11) to move the tap along its axis The feed mechanism (13), the moving mechanism (12) that makes the tap move along its axis vertically, the moving mechanism (12) is connected with the worktable (1), and the bottom of the feeding mechanism (13) is connected with the The moving mechanism (12) is connected, the protective shell (2) covers the clamping mechanism (11), the moving mechanism (12) and the feeding mechanism (13), the grinding device (4 ) includes a grinding wheel (43) for grinding taps, a first driving member that drives the rotation of the grinding wheel (43), the first driving member is connected with the protective shell (2), and its drive shaft is connected with the grinding wheel (43) , the protective shell (2) is connected with a dressing device (5) for dressing the grinding wheel (43), and the dressing device (5) is connected with the grinding wheel (43). 2. A tap thread grinding machine with a trimming mechanism according to claim 1, characterized in that: said grinding device (4) also includes a The rotating shaft (42) between them, the two ends of the rotating shaft (42) are respectively connected with the first driving member and the grinding wheel (43), and the dressing device (5) includes a The second driving member, the rotating shaft (52) connected with the second driving member, the thread rolling wheel (53) sleeved on the rotating shaft (52) and fixedly connected with the rotating shaft (52) , two first electric brushes (54) that are connected with described rotating shaft (52), the second electric brush (55) that is connected with described grinding wheel (43), described first electric brush (54), described The second electric brushes (55) are connected with the protective case (2), the two first electric brushes (54) are connected with one pole of the power supply, and the second electric brushes (55) are connected with the other pole of the power supply. One pole connection, the groove formed between the adjacent teeth of the thread rolling wheel (53) matches the blade of the grinding wheel (43), and the blade of the grinding wheel (43) is located at the edge of the thread rolling wheel (53) between adjacent teeth, and there is a gap between the grinding wheel (43) and the thread rolling wheel (53). 3. A tap thread grinder with a trimming mechanism according to claim 1, characterized in that: the protective case (2) includes a housing (21) connected to the workbench (1), connected to the The door body (22) connected to the housing (21), the door body (22) includes two fixing blocks (221) connected to the housing (21), and the fixing block (221) passing through A door shaft (222), two connecting blocks (223) fixedly connected to the door shaft (222), a revolving door (224) connected to the connecting block (223), two fixed blocks (221) between the position and the two connection blocks (223), and one of the fixed blocks (221) is connected to one of the connection blocks (223), and the other of the fixed blocks (221) is connected to the other of the connection blocks ( 223) abutting, the housing (21) is connected with a placement plate (7) for shelving waste, and is connected with a cleaning component (8) for cleaning the placement plate (7), and the placement plate (7) is located at the Below the grinding wheel (43), the door shaft (222) is connected to the bottom and connected to the control device (6) for controlling the movement of the cleaning assembly (8). 4. A tap thread grinding machine with a trimming mechanism according to claim 3, characterized in that: the placement plate (7) includes an inclined portion (71) and a horizontal portion (72), and the inclined portion (71 ) is connected with the horizontal portion (72), and it is inclined downwards from an end away from the horizontal portion (72), the inclined portion (71) is located below the grinding wheel (43), and the horizontal portion (72 ) is located above the feeding mechanism (13), and its two ends are connected to the housing (21), and the horizontal part (72) is connected to the cleaning assembly (8). 5. A kind of tap thread grinding machine with a trimming mechanism according to claim 4, characterized in that: the clamping mechanism (11) includes a clamping device for clamping the tap and driving the tap to rotate, a cylinder at the tip of the tap, The width of the horizontal portion (72) is smaller than the distance between the clamping device and the cylinder, and ensures the normal movement of the feeding mechanism (13). 6. A tap thread grinding machine with a trimming mechanism according to claim 5, characterized in that: the cleaning assembly (8) includes a limit block (81) sleeved on the horizontal portion (72) . The cleaning brush (82) abutting against the top of the horizontal part (72), the limiting block (81) is slidably connected with the horizontal part (72), and the top of the limiting block (81) is provided with a In the cleaning hole (811) of the cleaning brush (82), both ends of the cleaning brush (82) are connected to the limiting block (81). 7. A kind of tap thread grinding machine with a trimming mechanism according to claim 6, characterized in that: said cleaning brush (82) is arranged obliquely near the side wall of said inclined portion (71), and the inclination angle is the same as said The angle of inclination of the inclined portion (71) is matched, the cleaning brush (82) abuts against the inclined portion (71), the top surface of the cleaning brush (82) is inclined, and is made close to the inclined portion ( 71) one side is inclined downward, and the inclination angle of the top of the cleaning brush (82) is smaller than the inclination angle of the inclined part (71). 8. A kind of tap thread grinding machine with trimming mechanism according to claim 7, characterized in that: said control device (6) comprises a connecting rod (62) which is rotatably connected with said housing (21), and The main gear (63) fixedly connected with the connecting rod (62), the secondary gear (64) meshed with the primary gear (63), the threaded rod (65) connected with the secondary gear (64), drives the The linkage assembly (61) in which the connecting rod (62) and the door shaft (222) move synchronously. The linkage assembly (61) is a belt and a pulley. The axes of the main gear (63) are all coincident, the threaded rod (65) passes through the housing (21), and its two ends are rotationally connected with the housing (21), and the threaded rod (65) ) through the limiting block (81) and threadedly connected with the limiting block (81).