Machine tools for grinding broaching tools

Abstract

The present invention relates to the field of mechanical processing technology, and more specifically, to a machine tool for grinding and processing a broaching tool, comprising a fixing device, a clamping and stretching device arranged inside the fixing device, a hydraulic cylinder for driving the clamping and stretching device to move as a whole, and a cutting device arranged outside the clamping and stretching device. In the machine tool for grinding and processing a broaching tool, when the stretching bracket moves, the moving rack is driven to move together, and through the driving system, the rotating ring body in the spraying part is driven to rotate together with two groups of symmetrically distributed spraying heads, and when multiple groups of cutting devices fixed inside the tool placement table perform involute processing on the broaching tool, the processing part of the broaching tool is subjected to a cooling treatment, thereby ensuring the accuracy of the involute processing.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a machine tool for grinding and processing broaching tools. Background Art

[0002] The broaching machine is a machine tool used to grind the edge groove, back angle, plane and groove of cylindrical and square broaching tools. The machine tool adopts a four-axis CNC system, which is simple to operate, has low requirements on operators, and has good tool grinding consistency. Its main body is a casting structure with reasonable design and sufficient static, dynamic and thermal stiffness and high stability.

[0003] The patent with application number CN202221974765.1 discloses a chamfering and grinding device for a pin pull tool, including a workbench, on which a pair of symmetrically fixed brackets are fixed, on which V-shaped blocks are installed, and the V-shaped blocks are used to support the two ends of the pin pull tool. The bracket includes a base plate, and an adjustment base is arranged in the middle of the base plate, and the adjustment base is used to support the V-shaped block. The adjustment base is placed on a pair of parallel adjustment blocks, and the adjustment blocks are located on the base plate. The two adjustment blocks can approach or move away from each other in the length direction of the base plate. The structure is simple, the manufacturing cost is low, the installation is convenient, and the adjustment is simple and quick.

[0004] In the traditional production process of broaching tools, a high-speed rotating cutting device is used to accurately process the involute on the outer wall of the tool according to the needs of different workpieces. In this process, the broaching tool is usually driven by a cylinder to move, but an additional clamping device is required, which increases the investment cost of the overall device; in addition, the traditional processing machine tool is only equipped with a single set of cooling liquid nozzles. This layout method is prone to uneven cooling when multiple cutting devices are processed simultaneously, causing thermal deformation of the tool and the workpiece, which in turn affects the processing accuracy and causes dimensional deviation, making it difficult to meet high-precision design requirements. In view of this, we propose a machine tool for broaching tool grinding. Summary of the invention

[0005] The object of the present invention is to provide a machine tool for grinding broaching tools to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A machine tool for grinding and processing broaching tools, comprising a fixing device, a clamping and stretching device arranged inside the fixing device, a hydraulic cylinder for driving the clamping and stretching device to move as a whole, and a cutting device arranged outside the clamping and stretching device;

[0008] The fixing device comprises a fixed bottom plate, a fixed frame for providing a moving range for the clamping and stretching device, and a moving bracket for driving two sets of pin pulling tools placed in opposite ways to move;

[0009] The clamping and stretching device comprises a stretching portion and a clamping portion arranged inside a fixed frame;

[0010] The stretching part includes a stretching bracket moving inside the fixed frame and a moving rack moving along with the stretching bracket;

[0011] The clamping part includes a movable horizontal plate fixedly connected to the end of the hydraulic cylinder telescopic rod, two pulling rods arranged on the outer side wall of the movable horizontal plate, and a clamping rod that moves inward and outward with the movement of the pulling rods;

[0012] The cutting device comprises a mounting portion, two sets of spraying portions distributed symmetrically in the center, and a driving system for driving the internal structure of the spraying portion to rotate;

[0013] The mounting portion includes a fixing plate and two sets of tool placement tables whose positions correspond to the pulling rods;

[0014] The spray part includes an outer ring body, a rotating ring body sleeved inside the outer ring body, two groups of spray heads symmetrically distributed on the inner ring wall of the rotating ring body, and outer ring teeth that conflict with the internal structure of the driving system;

[0015] The driving system includes a rotating shaft that rotates as the moving rack moves, a placement rod that rotates as the rotating shaft rotates, a center rod arranged above the placement rod, rod end gears arranged at the left and right ends of the center rod, and a transmission part arranged between the placement rod and the center rod.

[0016] In the technical solution of the present invention, the bracket at the bottom corner of the fixed frame is fixedly connected to the top surface of the fixed base plate by bolts, the front and rear sides of the internal frame wall of the fixed frame are clamped and fixed with connecting slide rods, and the right side wall of the fixed frame is welded and fixed with an outer cover for increasing the fixed range of the hydraulic cylinder.

[0017] In the technical solution of the present invention, two guide slide bars for limiting the moving range of the movable bracket are welded and fixed on the top surface of the fixed base plate, and two groups of parallel docking pulleys are fixedly connected to the top surface of the fixed base plate on the left side of the cutting device by bolts and are used to ensure the smooth movement of the pin pulling tool.

[0018] In the technical solution of the present invention, the stretching bracket is slidably connected to the interior of the fixed frame, a sliding groove running through the upper and lower parts is provided inside the stretching bracket, limiting sliding holes for connecting the sliding rod to pass through are provided on the outer side walls at both ends of the stretching bracket, and the movable rack is fixedly connected to the outer side wall of the bottom horizontal plate of the stretching bracket by bolts.

[0019] In the technical solution of the present invention, the movable horizontal plate is fixedly connected to the end of the telescopic rod of the hydraulic cylinder by bolts, the pulling rod is clamped and fixed to the outer wall of the movable horizontal plate, the outer side of the pulling rod is provided with an outer sleeve, the outer sleeve is clamped and fixed to the outer wall of the stretching bracket, a spacer plate is integrally formed inside the outer sleeve, and a sliding groove for moving the clamping rod is provided on the outer side of the spacer plate, and connecting rods are connected between the pulling rod and several of the clamping rods.

[0020] In the technical solution of the present invention, the longitudinal cross-section of the fixed plate is in an inverted T-shape, a placement groove for placing the drive system is opened inside the fixed plate, and connecting grooves that pass through the inside and outside are opened near the bottom of the outer walls on both ends of the fixed plate. A tool placement table is clamped and fixed in the circular hole opened in the center of the outer wall of the fixed plate, and a positioning clamp block threadedly connected to the outer wall of the fixed plate is provided on the outside of the tool placement table.

[0021] In the technical solution of the present invention, the outer ring body is clamped and fixed on the outer wall of the fixed plate, the rotating ring body is rotatably connected to the inside of the outer ring body, and gaps are left on the inner side of the outer ring body and the outer side of the rotating ring body for external water source to be poured in. The sprinkler head is threadedly connected to the inner ring wall of the rotating ring body, the outer ring teeth are clamped and fixed on the outer wall of the rotating ring body, and the top ends of the two groups of outer ring bodies are connected to external water pipes through flanges.

[0022] In the technical solution of the present invention, the front and rear ends of the rotating shaft are respectively rotatably connected to the groove walls at the front and rear ends of the placing groove, a worm is sleeved at the center position of the outer wall of the rotating shaft, and the front and rear sides of the worm are clamped with docking gears meshing with the moving rack, the left and right ends of the placing rod are respectively rotatably connected to the groove walls at the left and right ends of the placing groove, and a worm wheel meshing with the worm is sleeved on the outer wall of the placing rod.

[0023] In the technical solution of the present invention, the center rod is rotatably connected to the inside of the placement groove and its left and right ends extend to the outside of the fixed plate. The rod end gear is fixedly connected to the end position of the center rod by a bayonet pin, and the rod end gear is meshed with the outer ring gear.

[0024] In the technical solution of the present invention, the transmission part includes two sets of upper and lower pulleys arranged in parallel and a transmission belt sleeved between the two sets of pulleys, and the upper and lower sets of the transmission belts are respectively sleeved on the outer side walls of the center rod and the placement rod.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the machine tool for grinding and processing the broaching tools, after the hydraulic cylinder is started, the movable cross plate fixed on the telescopic rod will first drive a plurality of clamping rods to fix the two sets of broaching tools through a plurality of connecting rods, and then contact the groove wall of the sliding groove, thereby driving the overall movement of the stretching part, and then driving the movement of the two sets of broaching tools, thereby reducing the investment in additional clamping devices and reducing the overall manufacturing cost of the equipment.

[0027] 2. In the machine tool for grinding and processing the broaching tool, when the stretching bracket moves, the moving rack is driven to move together, and the rotating ring in the spray part and two groups of symmetrically distributed spray heads are driven to rotate through the driving system. When multiple groups of cutting devices fixed inside the tool placement table perform involute processing on the broaching tool, the processing part of the broaching tool is cooled to ensure the accuracy of the involute processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the fixing device in the present invention;

[0030] Figure 3 It is a structural schematic diagram of the clamping and stretching device in the present invention;

[0031] Figure 4 It is a schematic structural diagram of the stretching portion in the present invention;

[0032] Figure 5 It is a schematic cross-sectional view of the structure of the clamping part in the present invention;

[0033] Figure 6 It is a schematic cross-sectional view of the structure of the cutting device in the present invention;

[0034] Figure 7 It is a schematic cross-sectional view of the structure of the installation part in the present invention;

[0035] Figure 8 It is a structural schematic diagram of the spraying part in the present invention;

[0036] Fig. 9 It is a schematic structural diagram of the outer sleeve ring body in the present invention;

[0037] Fig.10 It is a structural schematic diagram of the driving system in the present invention;

[0038] Fig.11 It is a partial structural schematic diagram of the driving system in the present invention;

[0039] Fig.12 It is a structural schematic diagram of the transmission part in the present invention;

[0040] Description of reference numerals:

[0041] 100, fixing device; 110, fixing base plate; 120, fixing frame; 130, connecting slide bar; 140, outer cover; 150, guide slide bar; 160, movable bracket; 170, docking pulley;

[0042] 200, hydraulic cylinder;

[0043] 300, clamping and stretching device; 310, stretching part; 311, stretching bracket; 3110, sliding groove; 3111, limiting sliding hole; 312, moving rack; 320, clamping part; 321, moving horizontal plate; 322, pulling rod; 323, clamping rod; 324, connecting rod; 325, outer sleeve; 326, spacer plate;

[0044] 400, cutting device; 410, mounting portion; 411, fixing plate; 4110, placement groove; 4111, connecting groove; 412, tool placement table; 413, positioning clamp; 420, spray portion; 421, outer ring body; 422, rotating ring body; 423, spray head; 424, outer ring teeth; 425, external water pipe; 430, driving system; 431, rotating shaft; 432, placement rod; 433, center rod; 434, rod end gear; 435, docking gear; 436, worm; 437, worm wheel; 438, transmission portion; 4380, pulley; 4381, transmission belt. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1-Figure 12 As shown, this embodiment provides a technical solution:

[0047] A machine tool for broaching tool grinding and processing, comprising a fixing device 100, a clamping and stretching device 300 arranged inside the fixing device 100, a hydraulic cylinder 200 for driving the clamping and stretching device 300 to move as a whole, and a cutting device 400 arranged outside the clamping and stretching device 300;

[0048] In this embodiment, Figure 2 As shown, the fixing device 100 includes a fixed base plate 110, a fixed frame 120 for providing a moving range for the clamping and stretching device 300, and a moving bracket 160 for driving two sets of pin pulling tools placed in opposite ways to move;

[0049] Specifically, the brackets at the bottom corners of the fixed frame 120 are fixedly connected to the top surface of the fixed base plate 110 by bolts, the front and rear sides of the internal frame wall of the fixed frame 120 are clamped and fixed with connecting slide rods 130, and the outer cover 140 for increasing the fixing range of the hydraulic cylinder 200 is welded and fixed on the right side wall of the fixed frame 120.

[0050] Furthermore, two guide slide bars 150 for limiting the moving range of the movable bracket 160 are welded and fixed on the top surface of the fixed base plate 110, and two groups of parallel docking pulleys 170 for ensuring smooth movement of the pin pulling tool are fixedly connected to the top surface of the fixed base plate 110 on the left side of the cutting device 400 by bolts.

[0051] Furthermore, the fixed base plate 110, the fixed frame 120 and the outer cover 140 are used to ensure the strength of the overall structure of the fixing device 100, the connecting slide rod 130 is used to limit the movement range of the internal structure of the clamping and stretching device 300, and the movable bracket 160 cooperates with the docking pulley 170 to facilitate the operator to move the two sets of pin pulling tools. At the same time, a pin is arranged inside the movable bracket 160 to fix the end of the pin pulling tool.

[0052] In this embodiment, Figure 3-Figure 4 As shown, the clamping and stretching device 300 includes a stretching portion 310 and a clamping portion 320 disposed inside the fixed frame 120;

[0053] Specifically, the stretching portion 310 includes a stretching bracket 311 that moves inside the fixed frame 120 and a moving rack 312 that moves along with the stretching bracket 311 .

[0054] Furthermore, the stretching bracket 311 is slidably connected to the interior of the fixed frame 120, and a sliding groove 3110 is provided inside the stretching bracket 311 that passes through from top to bottom. The outer walls at the front and rear ends of the stretching bracket 311 are provided with limiting sliding holes 3111 for connecting the sliding rod 130 to pass through, and the movable rack 312 is fixedly connected to the outer wall of the bottom horizontal plate of the stretching bracket 311 by bolts.

[0055] Furthermore, the telescopic rod of the hydraulic cylinder 200 is controlled to retract, and the movable cross plate 321 moves toward the hydraulic cylinder 200 inside the sliding groove 3110, and drives the movable rack 312 to move at the same time.

[0056] In this embodiment, Figure 5 As shown, the clamping part 320 includes a moving horizontal plate 321 fixedly connected to the end of the telescopic rod of the hydraulic cylinder 200, two pulling rods 322 arranged on the outer side wall of the moving horizontal plate 321, and a clamping rod 323 that moves inward and outward with the movement of the pulling rod 322;

[0057] Specifically, the movable horizontal plate 321 is fixedly connected to the end of the telescopic rod of the hydraulic cylinder 200 by bolts, the pulling rod 322 is clamped and fixed on the outer wall of the movable horizontal plate 321, the outer side of the pulling rod 322 is provided with an outer sleeve 325, the outer sleeve 325 is clamped and fixed on the outer wall of the stretching bracket 311, and a partition plate 326 is integrally formed inside the outer sleeve 325. A sliding groove for moving the clamping rod 323 is provided on the outer side of the partition plate 326, and a connecting rod 324 is connected between the pulling rod 322 and several clamping rods 323.

[0058] Furthermore, as the pulling rod 322 moves with the moving cross plate 321, the fixing angle of the connecting rod 324 changes, thereby driving the clamping rod 323 to shrink in the groove on the partition plate 326, and then clamping and fixing the two pin pulling tools, the moving cross plate 321 comes into contact with the groove wall of the sliding groove 3110, thereby driving the stretching bracket 311 and the two pin pulling tools to move as a whole toward the direction of the hydraulic cylinder 200.

[0059] In this embodiment, Figure 6-Figure 7 As shown, the cutting device 400 includes a mounting portion 410, two sets of spraying portions 420 that are centrally symmetrically distributed, and a driving system 430 for driving the internal structure of the spraying portion 420 to rotate;

[0060] Specifically, the mounting portion 410 includes a fixing plate 411 and two sets of tool placement tables 412 whose positions correspond to the pulling rods 322 .

[0061] Furthermore, the longitudinal cross-section of the fixing plate 411 is in an inverted T-shape, and a placement groove 4110 for placing the drive system 430 is provided inside the fixing plate 411, and connecting grooves 4111 that pass through the inside and outside are provided at positions near the bottom of the outer walls at both ends of the fixing plate 411, and a tool placement platform 412 is clamped and fixed in a circular hole in the center of the outer wall of the fixing plate 411, and a positioning clamp 413 that is threadedly connected to the outer wall of the fixing plate 411 is provided on the outer side of the tool placement platform 412.

[0062] Furthermore, the fixed plate 411 is used to ensure the stability of the structure of the mounting portion 410, the connecting groove 4111 is used to provide a space for the moving rack 312 to pass through, the tool placement table 412 is used to place multiple groups of regularly distributed involute cutting tools, and after starting, an involute that meets the size is cut on the outside of the pin pull tool, and the positioning clamp 413 is used to ensure the stability of the overall structure of the tool placement table 412.

[0063] In this embodiment, Figure 8-Figure 9 As shown, the spraying part 420 includes an outer ring body 421, a rotating ring body 422 sleeved inside the outer ring body 421, two groups of spray heads 423 symmetrically distributed on the inner ring wall of the rotating ring body 422, and outer ring teeth 424 that conflict with the internal structure of the driving system 430;

[0064] Specifically, the outer ring body 421 is clamped and fixed on the outer wall of the fixed plate 411, and the rotating ring body 422 is rotatably connected to the inside of the outer ring body 421. The inner side of the outer ring body 421 and the outer side of the rotating ring body 422 leave gaps for external water to be poured in. The sprinkler head 423 is threadedly connected to the inner ring wall of the rotating ring body 422, and the outer ring teeth 424 are clamped and fixed on the outer wall of the rotating ring body 422. The top ends of the two groups of outer ring bodies 421 are connected to the external water pipe 425 through flanges.

[0065] Furthermore, after the outer ring teeth 424 rotate, the rotating ring body 422 rotates together with the two groups of symmetrically distributed spray heads 423, and the water entering the outer ring body 421 through the external water pipe 425 is evenly sprayed by the spray heads 423 toward the position where the pin pulling tool cuts.

[0066] In this embodiment, Figure 10-12 As shown, the driving system 430 includes a rotating shaft 431 that rotates as the moving rack 312 moves, a placing rod 432 that rotates as the rotating shaft 431 rotates, a center rod 433 disposed above the placing rod 432, rod end gears 434 disposed at the left and right ends of the center rod 433, and a transmission part 438 disposed between the placing rod 432 and the center rod 433;

[0067] Specifically, the front and rear ends of the rotating shaft 431 are respectively rotatably connected to the groove walls at the front and rear ends of the placement groove 4110, and a worm 436 is sleeved at the center position of the outer wall of the rotating shaft 431. The front and rear sides of the worm 436 are both clamped with a docking gear 435 meshing with the moving rack 312. The left and right ends of the placement rod 432 are respectively rotatably connected to the groove walls at the left and right ends of the placement groove 4110, and a worm wheel 437 meshing with the worm 436 is sleeved on the outer wall of the placement rod 432.

[0068] Furthermore, the center rod 433 is rotatably connected to the inside of the placement groove 4110 and its left and right ends extend to the outside of the fixed plate 411. The rod end gear 434 is fixedly connected to the end position of the center rod 433 by a bayonet pin, and the rod end gear 434 is meshed with the outer ring gear 424.

[0069] Furthermore, the transmission part 438 includes two sets of upper and lower pulleys 4380 arranged in parallel and a transmission belt 4381 sleeved between the two sets of pulleys 4380, and the upper and lower transmission belts 4381 are respectively sleeved on the outer walls of the center rod 433 and the placement rod 432.

[0070] Furthermore, when the pin pulling tool at the front end moves inside the workpiece to be processed, the movement of the moving rack 312 will drive the docking gear 435 to rotate, and drive the rotating shaft 431 together with the worm 436 to rotate. The worm 436 rotates after contacting the worm wheel 437, and then drives the placement rod 432 and the pulley 4380 located below to rotate. After the rotational power is transmitted through the transmission belt 4381, the pulley 4380 located above and the center rod 433 also rotate, thereby driving the rod end gear 434 to rotate.

[0071] Finally, it should be noted that the hydraulic cylinder 200 involved in the present invention is a universal standard part or a part known to those skilled in the art, and its structure and principle are known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of the device, the hydraulic cylinder 200 is connected to an external power supply through a wire. The specific connection means should refer to the working principle of the present invention. The electrical connections between the electrical components are completed in a sequential working order, and the detailed connection means are all well-known technologies in the art.

[0072] When the machine tool for broaching tool grinding and processing of the present invention is used, two broaching tools are first placed in the collar inside the movable bracket 160 in the fixing device 100, and a plurality of cutting devices are fixed inside the tool placement table 412;

[0073] Next, the movable bracket 160 is driven to move toward the hydraulic cylinder 200, and the ends of the two pin pulling tools are inserted into the inner part of the outer sleeve 325;

[0074] Then, the telescopic rod of the hydraulic cylinder 200 is controlled to retract, driving the movable horizontal plate 321 to move inside the sliding groove 3110 toward the direction of the hydraulic cylinder 200;

[0075] At this time, as the pulling rod 322 moves along with the moving horizontal plate 321, the fixing angle of the connecting rod 324 changes, and the clamping rod 323 is driven to contract in the slot on the partition plate 326, and then the two pin pulling tools are clamped and fixed, and the moving horizontal plate 321 contacts the groove wall of the sliding groove 3110, thereby driving the stretching bracket 311 and the two pin pulling tools to move toward the direction of the hydraulic cylinder 200 as a whole;

[0076] When the two pin pulling tools move inside the tool placement table 412, several groups of cutting devices are started to perform involute cutting on the outer wall of the pin pulling tools. At this time, the movement of the moving rack 312 will drive the docking gear 435 to rotate, and drive the rotating shaft 431 and the worm 436 to rotate. The worm 436 rotates after contacting the worm wheel 437, and then drives the placement rod 432 and the pulley 4380 located below to rotate. After the rotation power is transmitted through the transmission belt 4381, the pulley 4380 located above and the center rod 433 also rotate, thereby driving the rod end gear 434 to rotate;

[0077] Subsequently, the outer ring gear 424 meshing with the rod end gear 434 rotates, causing the rotating ring body 422 and two sets of symmetrically distributed spray heads 423 to rotate, and causing the water entering the outer ring body 421 from the external water pipe 425 to be sprayed uniformly from the spray heads 423 toward the position of the involute cutting of the pin puller;

[0078] Afterwards, the hydraulic cylinder 200 drives the left end portions of the two pin pulling tools to move to the outer wall of the left end of the fixed frame 120 and then stops. The hydraulic cylinder 200 controls the telescopic rod to stretch and allows the two pin pulling tools to return to their initial positions. After changing the placement angles of the two pin pulling tools, the above operations are repeated to complete the involute cutting of the pin pulling tools.

[0079] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A machine tool for grinding broaching tools, comprising a fixing device (100), a clamping and stretching device (300) arranged inside the fixing device (100), a hydraulic cylinder (200) for driving the clamping and stretching device (300) to move as a whole, and a cutting device (400) arranged outside the clamping and stretching device (300); characterized in that: The fixing device (100) comprises a fixing base plate (110), a fixing frame (120) for providing a moving range for the clamping and stretching device (300), and a moving bracket (160) for driving two sets of pin pulling tools placed in opposite directions to move; The clamping and stretching device (300) comprises a stretching portion (310) and a clamping portion (320) arranged inside a fixed frame (120); The stretching portion (310) comprises a stretching bracket (311) that moves inside the fixed frame (120) and a moving rack (312) that moves along with the stretching bracket (311); The clamping portion (320) comprises a movable horizontal plate (321) fixedly connected to the end of the telescopic rod of the hydraulic cylinder (200), two pulling rods (322) arranged on the outer side wall of the movable horizontal plate (321), and a clamping rod (323) that moves inward and outward by contraction as the pulling rod (322) moves; The cutting device (400) comprises a mounting portion (410), two groups of spraying portions (420) distributed symmetrically with respect to the center, and a driving system (430) used to drive the internal structure of the spraying portion (420) to rotate; The mounting portion (410) comprises a fixing plate (411) and two sets of tool placement tables (412) whose positions correspond to the pulling rods (322); The spraying part (420) comprises an outer ring body (421), a rotating ring body (422) sleeved inside the outer ring body (421), two groups of spray heads (423) symmetrically distributed on the inner ring wall of the rotating ring body (422) in the upper and lower parts, and outer ring teeth (424) that interfere with the internal structure of the driving system (430); The driving system (430) comprises a rotating shaft (431) that rotates as the moving rack (312) moves, a placement rod (432) that rotates as the rotating shaft (431) rotates, a center rod (433) disposed above the placement rod (432), rod end gears (434) disposed at the left and right ends of the center rod (433), and a transmission part (438) disposed between the placement rod (432) and the center rod (433).

2. The machine tool for broaching tool grinding according to claim 1, characterized in that: The brackets at the bottom corners of the fixed frame (120) are fixedly connected to the top surface of the fixed base plate (110) by means of bolts, the front and rear sides of the internal frame wall of the fixed frame (120) are both clamped and fixed with connecting slide bars (130), and the right side wall of the fixed frame (120) is welded and fixed with an outer cover (140) for increasing the fixing interval of the hydraulic cylinder (200).

3. The machine tool for broaching tool grinding according to claim 1, characterized in that: Two guide slide bars (150) for limiting the moving range of the movable bracket (160) are welded and fixed on the top surface of the fixed base plate (110), and two sets of parallel docking pulleys (170) for ensuring smooth movement of the pin puller are fixedly connected to the top surface of the fixed base plate (110) on the left side of the cutting device (400) by bolts.

4. The machine tool for broaching tool grinding according to claim 2, characterized in that: The stretching bracket (311) is slidably connected to the interior of the fixed frame (120); a sliding groove (3110) penetrating from top to bottom is provided inside the stretching bracket (311); both the front and rear outer side walls of the stretching bracket (311) are provided with limiting sliding holes (3111) for connecting the sliding rod (130) to pass through; and the movable rack (312) is fixedly connected to the outer side wall of the bottom horizontal plate of the stretching bracket (311) by bolts.

5. The machine tool for broaching tool grinding according to claim 1, characterized in that: The movable horizontal plate (321) is fixedly connected to the end of the telescopic rod of the hydraulic cylinder (200) by bolts, and the pulling rod (322) is fixedly connected to the outer wall of the movable horizontal plate (321). The outer side of the pulling rod (322) is provided with an outer sleeve (325), and the outer sleeve (325) is fixedly connected to the outer wall of the stretching bracket (311). A spacer plate (326) is integrally formed inside the outer sleeve (325), and a sliding groove for moving the clamping rod (323) is provided on the outer side of the spacer plate (326). Connecting rods (324) are connected between the pulling rod (322) and a plurality of the clamping rods (323).

6. The machine tool for broaching tool grinding according to claim 1, characterized in that: The longitudinal cross-section of the fixing plate (411) is in an inverted T-shape. A placement groove (4110) for placing the drive system (430) is provided inside the fixing plate (411). The outer walls at both ends of the fixing plate (411) are provided with connecting grooves (4111) that pass through the inside and outside at positions close to the bottom. A tool placement platform (412) is clamped and fixed in a circular hole provided in the center of the outer wall of the fixing plate (411). A positioning clamp (413) that is threadedly connected to the outer wall of the fixing plate (411) is provided on the outer side of the tool placement platform (412).

7. The machine tool for broaching tool grinding according to claim 1, characterized in that: The outer ring body (421) is fixedly engaged with the outer wall of the fixed plate (411); the rotating ring body (422) is rotatably connected to the inside of the outer ring body (421); a gap for external water source to be poured in is reserved on the inner side of the outer ring body (421) and the outer side of the rotating ring body (422); the sprinkler head (423) is threadedly connected to the inner ring wall of the rotating ring body (422); the outer ring teeth (424) are fixedly engaged with the outer wall of the rotating ring body (422); and the top ends of the two groups of outer ring bodies (421) are connected to external water pipes (425) via flanges.

8. The machine tool for broaching tool grinding according to claim 6, characterized in that: The front and rear ends of the rotating shaft (431) are respectively rotatably connected to the groove walls at the front and rear ends of the placement groove (4110); a worm (436) is sleeved at the center of the outer wall of the rotating shaft (431); the front and rear sides of the worm (436) are both clamped with a docking gear (435) meshing with the moving rack (312); the left and right ends of the placement rod (432) are respectively rotatably connected to the groove walls at the left and right ends of the placement groove (4110); and a worm wheel (437) meshing with the worm (436) is sleeved on the outer wall of the placement rod (432).

9. The machine tool for broaching tool grinding according to claim 8, characterized in that: The center rod (433) is rotatably connected to the inside of the placement groove (4110) and its left and right ends both extend to the outside of the fixed plate (411). The rod end gear (434) is fixedly connected to the end position of the center rod (433) via a bayonet pin, and the rod end gear (434) is meshed with the outer ring gear (424).

10. The machine tool for broaching tool grinding according to claim 1, characterized in that: The transmission part (438) comprises two sets of upper and lower pulleys (4380) arranged in parallel and a transmission belt (4381) sleeved between the two sets of pulleys (4380), and the upper and lower sets of the transmission belt (4381) are respectively sleeved on the outer side walls of the center rod (433) and the placement rod (432).

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