Grinding jig for deep hole drill

Abstract

The utility model discloses a coping jig for a deep hole drill. The coping jig comprises a lifting assembly, a clamping assembly and a liquid spraying cooling part. A lifting power source is connected to a lifting frame of the lifting assembly, and U-shaped inner guide holes are symmetrically formed in a supporting base plate of the lifting frame. Two transverse moving power units of a clamping assembly are symmetrically installed on a supporting base plate, the telescopic ends of the transverse moving power units are connected with the center of the upper end of a clamping plate, guide blocks of the clamping plate are transversely and slidably connected with an inner guide hole in an equal-diameter mode, and outer clamping holes slidably penetrate through guide end plates on the two sides of the inner guide hole in an equal-diameter mode. Grinding fixing sleeves are rotationally connected into lateral through holes in the lower end of the clamping plate at equal intervals in the longitudinal direction, and the transverse movement power unit is started, so that the multiple sets of symmetrical grinding fixing sleeves are secondarily clamped and fixedly connected with the two ends of the deep hole drill correspondingly; the liquid spraying cooling part is fixedly connected with the supporting base plate and right faces the deep hole drill below the supporting base plate. The automatic polishing device has the effects of automatic batch polishing, good clamping, locking and positioning and high and consistent polishing precision.

Description

Technical Field

[0001] This utility model relates to the field of metal tool processing, and in particular to a grinding fixture for deep hole drilling. Background Technology

[0002] Deep hole drills are specialized drill bits used for machining deep holes and are common tools in metal cutting. Over time, they can rust, requiring grinding to reuse them. Currently, this is typically done manually, one drill bit at a time. However, this method has several drawbacks: firstly, grinding each rusted drill bit individually is time-consuming, labor-intensive, and inefficient; secondly, individual grinding results in poor positioning, leading to significant deviations in grinding precision for each drill bit and consequently, larger deviations in subsequent hole machining. Utility Model Content

[0003] To address one or more of the aforementioned problems, this invention provides a grinding fixture for deep hole drilling.

[0004] According to one aspect of the present invention, a grinding fixture for deep hole drilling includes: a lifting assembly, a clamping assembly, a liquid spraying cooling section, a grinding machine body, and a deep hole drill.

[0005] The lifting assembly includes a lifting frame and a lifting power source. The lifting frame is hollow inside to form an open mounting cavity on the left and right sides. The support base plate of the lifting frame is symmetrically provided with several U-shaped internal guide holes on the left and right sides. The center of the lifting top plate of the lifting frame is connected to the lower end of the lifting power source.

[0006] The clamping assembly includes two lateral movement force units and two clamping plates. The fixed ends of the two lateral movement force units are located in the mounting cavity and are symmetrically mounted on the support base plate. The telescopic ends of the lateral movement force units are connected to the upper center of the clamping plate. The clamping plate has several guide blocks in the middle and external clamping holes on both sides of the guide blocks. The guide blocks are laterally slidably connected to the inner guide holes with equal diameters, and the external clamping holes slide through the guide end plates on both sides of the inner guide holes with equal diameters, so as to realize the lateral movement of the clamping plate with dual guidance. The lower end of the clamping plate has several lateral through holes at equal intervals in the longitudinal direction. A grinding fixing sleeve is rotatably connected in each lateral through hole. When the lateral movement force unit is activated, the several sets of symmetrical grinding fixing sleeves are clamped and fixed to the two ends of the deep hole drill respectively.

[0007] The liquid spray cooling section is fixedly connected to the support substrate and is directly opposite the deep hole drill below;

[0008] The grinding machine body is fixedly connected to the lifting power source.

[0009] This grinding fixture for deep hole drilling enables the simultaneous clamping of multiple deep hole drills. It employs a dual-guide system to ensure clamping accuracy, and combined with the efficient and reliable locking of the grinding fixing sleeve, it achieves excellent batch grinding. Its advantages are: firstly, automated batch grinding significantly increases production speed and efficiency; secondly, batch grinding of a large number of drills of the same model, with excellent clamping, locking, and positioning, ensures high and consistent grinding accuracy, resulting in precise subsequent hole machining; and thirdly, the use of a liquid-cooled spray section removes impurities and effectively reduces temperature, achieving excellent grinding precision.

[0010] In some implementations, the lateral movement force unit is a hydraulic push rod or a linear servo cylinder.

[0011] In some embodiments, the grinding fixing sleeve includes an annular sleeve body and several elastic clips. The elastic clips are arranged in a circumferential array and integrally connected to the sleeve body. There is an arc-shaped elastic opening between adjacent elastic clips. The sleeve body rotates to fit into the lateral through hole, and the elastic clips extend out of the lateral through hole. The elastic clips are inserted into both ends of the deep hole drill and are interference-fitted into the sleeve body. The elastic clips lock the deep hole drill once, and the sleeve body locks the end of the deep hole drill a second time.

[0012] In some embodiments, the inner side of the sleeve body is provided with a clamping and positioning groove with a blind hole structure, and the deep hole drill end is inserted into the clamping and positioning groove of the sleeve body and fits against its inner groove wall.

[0013] Alternatively, a polytetrafluoroethylene elastic layer may be applied to the inner surface of the main body and the elastic clips.

[0014] In some embodiments, the sleeve body is rotatably connected to the lateral through hole via a bearing, which is a deep groove ball bearing.

[0015] In some embodiments, the lifting frame also includes four support columns, the lower ends of which are vertically connected to the support base plate and the lower ends of the lifting top plate, thereby forming a three-dimensional rectangular frame structure of the lifting frame.

[0016] The four sides of the supporting base plate and the lifting top plate can be sealed by vertical sealing plates, and the left and right sealing plates are provided with clearance through holes.

[0017] In some implementations, the lifting power source is a hydraulic push rod or a linear servo cylinder, the upper end of which is vertically connected to the reference base of the grinding machine body.

[0018] In some implementations, the lifting power source is a connecting shaft, and the upper end of the connecting shaft is rotatably connected to the output end of the multi-axis robot.

[0019] In some embodiments, the liquid spraying cooling section includes a plurality of liquid spray nozzles, and the support substrate is further provided with a liquid passage channel. The lower end of the liquid passage channel is provided with a rectangular array of vertical liquid passage channels, and the plurality of liquid spray nozzles are vertically threaded to the vertical liquid passage channels.

[0020] The upper end of the support substrate is provided with a central liquid inlet hole, the lower end of which is connected to the liquid passage and the upper end is connected to the water tank.

[0021] In some embodiments, the clamping plate is also provided with a clearance through hole for the liquid nozzle to pass through. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a grinding fixture for deep hole drilling according to one embodiment of the present invention.

[0023] Figure 2 for Figure 1 The diagram shows an enlarged view of point I of a grinding fixture used for deep hole drilling.

[0024] Figure 3 for Figure 2 A three-dimensional schematic diagram of the clamping plate shown;

[0025] Figure 4 for Figure 1 The diagram shows an enlarged view of section II of a grinding fixture used for deep hole drilling.

[0026] Figure 5 for Figure 1 A three-dimensional schematic diagram of the lifting assembly shown;

[0027] Figure 6 for Figure 1 The diagram shows a left-side view of a grinding fixture used for deep hole drilling.

[0028] Figure 7 for Figure 1 The diagram shows a cross-sectional view of a grinding fixture used for deep hole drilling.

[0029] Figure 8 for Figure 7 The diagram shows a partially enlarged schematic of a grinding fixture for deep hole drilling.

[0030] Lifting assembly 1, lifting frame 10, mounting cavity 100, support base plate 101, lifting top plate 102, support column 103, inner guide hole 104, guide end plate 105, liquid passage 106, vertical liquid passage 107, central liquid inlet hole 108, lifting power source 11.

[0031] Clamping assembly 2, lateral movement force unit 20, fixed end 201, telescopic end 202, clamping plate 21, guide block 210, outer clamping hole 211, lateral through hole 212, clearance through hole 213, grinding fixing sleeve 22, sleeve body 220, elastic clamping piece 221, elastic opening 222, clamping positioning groove 223, bearing 23;

[0032] Liquid spraying cooling section 3, liquid spray nozzle 31;

[0033] Grinding machine body 00, deep hole drill 01. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, while the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0035] Figures 1 to 8 A grinding fixture for deep hole drilling according to one embodiment of the present invention is schematically shown. As shown in the figure, the grinding fixture for deep hole drilling includes: a lifting assembly 1, a clamping assembly 2, a liquid spray cooling section 3, a grinding machine body 00, and a deep hole drill 01;

[0036] The lifting assembly 1 includes a lifting frame 10 and a lifting power source 11. The lifting frame 10 is hollow inside to form an installation cavity 100 with open sides. The support base plate 101 of the lifting frame 10 has several U-shaped inner guide holes 104 symmetrically arranged on the left and right sides. The lifting top plate 102 of the lifting frame 10 is connected to the lower end of the lifting power source 11 at its center.

[0037] The clamping assembly 2 includes two lateral movement force units 20 and two clamping plates 21. The fixed ends 201 of the two lateral movement force units 20 are located in the mounting cavity 100 and are symmetrically mounted on the support base plate 101. The telescopic ends 202 of the lateral movement force units 20 are connected to the upper center of the clamping plates 21. The lateral movement force unit 20 is preferably a hydraulic push rod or a linear servo cylinder.

[0038] The clamping plate 21 has several guide blocks 210 in the middle and external clamping holes 211 on both sides of the guide blocks 210. The guide blocks 210 are laterally slidably connected to the inner guide hole 104 and the external clamping holes 211 are laterally slidably connected to the guide end plates 105 on both sides of the inner guide hole 104, so as to realize the lateral movement of the clamping plate 21 with double guidance. The lower end of the clamping plate 21 has several lateral through holes 212 at equal intervals in the longitudinal direction. A grinding fixing sleeve 22 is rotatably connected in each lateral through hole 212. When the lateral movement force unit 20 is activated, the several sets of symmetrical grinding fixing sleeves 22 are clamped and fixed to the two ends of the deep hole drill 01 for a second time.

[0039] The liquid spray cooling section 3 is fixedly connected to the support substrate 101 and is directly opposite the deep hole drill 01 below it;

[0040] The grinding machine body 00 is fixedly connected to the lifting power source 11. The lifting power source 11 is preferably a hydraulic push rod or a linear servo cylinder, with its upper end vertically connected to the reference base of the grinding machine body 00. In another preferred embodiment, the lifting power source 11 is a connecting shaft, with its upper end rotatably connected to the output end of a multi-axis robot.

[0041] This grinding fixture for deep hole drilling enables the simultaneous clamping of multiple deep hole drills 01, and employs a dual-guide system to ensure clamping accuracy. Combined with the efficient and reliable locking of the grinding fixing sleeve 22, it achieves excellent batch grinding. Its beneficial effects are: firstly, automated batch grinding greatly improves production speed and efficiency; secondly, batch grinding of a large number of drills of the same model, with excellent clamping, locking, and positioning, results in high and consistent grinding accuracy, leading to precise subsequent hole machining; and thirdly, the use of a liquid spray cooling section 3 removes impurities and effectively cools the drills, achieving excellent grinding accuracy.

[0042] Furthermore, the grinding and fixing sleeve 22 includes an annular sleeve body 220 and several elastic clamping pieces 221. The elastic clamping pieces 221 are arranged in a circumferential array and integrally connected to the sleeve body 220. Between adjacent elastic clamping pieces 221 are arc-shaped elastic openings 222. The sleeve body 220 rotates to engage with the lateral through hole 212, and the elastic clamping pieces 221 extend outwards from the lateral through hole 212. The elastic clamping pieces 221 are inserted into both ends of the deep hole drill 01 and are interference-fitted into the sleeve body 220. The elastic clamping pieces 221 lock the deep hole drill 01 once, and the sleeve body 220 locks the end of the deep hole drill 01 a second time. Its beneficial effect is that the secondary elastic locking achieves good fixing and clamping, and effectively protects the drill from damage.

[0043] Preferably, the inner side of the sleeve body 220 is provided with a clamping and positioning groove 223 with a blind hole structure, and the end of the deep hole drill 01 is interference-fitted into the clamping and positioning groove 223 of the sleeve body 220 and fits against its inner groove wall. The beneficial effect is that this setting ensures high clamping accuracy.

[0044] Preferably, the inner surfaces of the sleeve body 220 and the elastic clip 221 are covered with a polytetrafluoroethylene elastic layer. The beneficial effect is that this arrangement further protects the drill bit surface.

[0045] Preferably, the sleeve body 220 is rotatably connected to the lateral through hole 212 via a bearing 23, which is a deep groove ball bearing. The advantage of this arrangement is that it enables good rotational performance.

[0046] Furthermore, the lifting frame 10 also includes four support columns 103, the lower ends of which are vertically connected to the support base plate 101 and the lower ends of the lifting top plate 102, thereby forming a three-dimensional rectangular frame structure of the lifting frame 10.

[0047] The four sides of the supporting base plate 101 and the lifting top plate 102 can be sealed by vertical sealing plates, and the left and right sealing plates are provided with clearance through holes. The beneficial effect is that this sealing arrangement can effectively protect the internal parts from damage.

[0048] Furthermore, the liquid spraying cooling section 3 includes several liquid spray nozzles 31, and the support substrate 101 is also provided with a liquid passage 106. The lower end of the liquid passage 106 is provided with a rectangular array of vertical liquid passages 107, and several liquid spray nozzles 31 are vertically threaded to the vertical liquid passages 107.

[0049] The support base plate 101 has a central liquid inlet hole 108 at its upper end, which is connected to the liquid passage 106 at its lower end and to the water tank at its upper end. The beneficial effect is that this arrangement can effectively and evenly spray coolant onto each drill bit, achieving uniform and effective cooling.

[0050] Preferably, the clamping plate 203 is also provided with a clearance through hole 213 for the liquid spray nozzle 31 to pass through. The advantage of this is that the overall structure is compact and the equipment is small in size.

[0051] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A regrinding jig for a deep hole drill, characterized by, It comprises: a lifting assembly (1), a clamping assembly (2), a liquid cooling part (3) and a grinder body (00), a deep hole drill (01); The lifting assembly (1) comprises a lifting frame (10) and a lifting power source (11), the lifting frame (10) is internally hollow to form a left and right open mounting cavity (100), the support base plate (101) of the lifting frame (10) is symmetrically provided with a plurality of U-shaped inner guide holes (104) on the left and right sides, and the lifting top plate (102) of the lifting frame (10) is connected with the lower end of the lifting power source (11) at the center position; The clamping assembly (2) comprises two horizontal moving force units (20) and two clamping plates (21), the fixed ends (201) of the two horizontal moving force units (20) are located in the mounting cavity (100) and are symmetrically mounted on the support base plate (101), the telescopic ends (202) of the horizontal moving force units (20) are connected with the upper end centers of the clamping plates (21), the clamping plates (21) are provided with a plurality of guide blocks (210) and outer clamping holes (211) on the left and right sides of the guide blocks (210) in the middle, the guide blocks (210) are transversely and slidingly connected with the inner guide holes (104), and the outer clamping holes (211) are slidingly connected with the guide end plates (105) on the left and right sides of the inner guide holes (104), so that the clamping plates (21) are horizontally moved in double-guide mode, a plurality of lateral through holes (212) are longitudinally and equally spaced on the lower end of the clamping plate (21), one polishing fixing sleeve (22) is rotatably connected in each lateral through hole (212), and the horizontal moving force units (20) are started to make a plurality of groups of symmetrical polishing fixing sleeves (22) respectively and twice clamped and fixedly connected with the two ends of the deep hole drill (01). The liquid cooling part (3) is fixedly connected with the support base plate (101) and faces the deep hole drill (01) below. The grinder body (00) is fixedly connected with the lifting power source (11).

2. The tool for grinding a deep hole drill according to claim 1, wherein The horizontal moving force units (20) are hydraulic push rods or linear servo electric cylinders.

3. The tool according to claim 1, wherein The polishing fixing sleeve (22) comprises an annular sleeve body (220) and a plurality of elastic clamping pieces (221), the elastic clamping pieces (221) are circumferentially arranged and integrally connected with the sleeve body (220), adjacent elastic clamping pieces (221) are provided with arc-shaped elastic openings (222) therebetween, the sleeve body (220) is rotatably sleeved with the lateral through hole (212), the elastic clamping pieces (221) protrude out of the lateral through hole (212), the two ends of the deep hole drill (01) are inserted into the elastic clamping pieces (221) and are inserted into the sleeve body (220) in an interference mode, the elastic clamping pieces (221) once lock the deep hole drill (01), and the sleeve body (220) twice locks the end of the deep hole drill (01).

4. The tool according to claim 3, wherein The inner side of the center of the sleeve body (220) is provided with a clamping positioning groove (223) with a blind hole structure, the end of the deep hole drill (01) is inserted into the clamping positioning groove (223) of the sleeve body (220) in an interference mode and abuts against the inner groove wall thereof. Or the inner side surfaces of the sleeve body (220) and the elastic clamping pieces (221) are covered with a polytetrafluoroethylene elastic layer.

5. The tool according to claim 3, wherein The sleeve body (220) is rotationally connected to the lateral through hole (212) through a bearing (23), which is a deep groove ball bearing.

6. The tool for resharpening a drill for deep holes according to claim 1, characterized in that, The lifting frame (10) further comprises four support columns (103), the lower ends of which are vertically connected to the support base plate (101) and the lifting top plate (102), thereby forming a lifting frame (10) with a three-dimensional rectangular frame structure. The four sides of the support base plate (101) and the lifting top plate (102) can be sealed by vertical sealing plates, and the left and right sealing plates are provided with avoiding through holes.

7. The tool according to claim 1, wherein The lifting power source (11) is a hydraulic push rod or a linear servo electric cylinder, the upper end of which is vertically connected to the reference seat of the grinder body (00).

8. The tool according to claim 1, wherein The lifting power source (11) is a connecting shaft, the upper end of which is rotationally connected to the output end of the multi-axis manipulator.

9. The tool according to claim 1, wherein The liquid spraying cooling part (3) comprises a plurality of liquid spraying nozzles (31), and the support base plate (101) is further provided with a liquid passing cavity (106), the lower end of which is provided with a vertical liquid passing hole (107) in a rectangular array, and the plurality of liquid spraying nozzles (31) are vertically screwed to the vertical liquid passing hole (107). The upper end of the support base plate (101) is provided with a central liquid inlet hole (108), the lower end of which is communicated with the liquid passing cavity (106) and the upper end of which is communicated with a water tank.

10. The tool for resharpening a drill for deep holes according to claim 9, characterized in that, The clamping plate (203) is further provided with an avoiding through hole (213) for the liquid spraying nozzle (31) to pass through. The sleeve body (220) is rotationally connected to the lateral through hole (212) through a bearing (23), which is a deep groove ball bearing.

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