A precision machining device for a dividing plate used in a large flat grinding wheel gear grinding machine

Abstract

The present invention belongs to the field of precision machining technology, and specifically relates to a precision machining device for a dividing plate for a large flat grinding wheel gear grinding machine. The precision machining device for a dividing plate for a large flat grinding wheel gear grinding machine comprises a subdivided multi-tooth automatic dividing table device arranged on a marble platform, and is characterized in that: a Z-axis column device (5) is also arranged on the marble platform (1); a precision guide rail device (4) is arranged on the Z-axis column device (5); a grinding device (3) is connected to the precision guide rail device (4); and the precision guide rail device (4) is connected to the Z-axis column device (5) via a fixed wedge-shaped flexible hinge structure. The dividing plate for a large flat grinding wheel gear grinding machine of the present invention has a high degree of automation, good self-precision, high indexing accuracy, and simple operation. The processed dividing plate for a large flat grinding wheel gear grinding machine has high precision and can be used for grinding ultra-high precision gears or gear tools.

Description

Technical Field

[0001] The invention belongs to the technical field of precision machining, and relates to a precision machining device for a dividing plate used in a large plane grinding wheel gear grinding machine. Background Art

[0002] The Y7125 gear grinding machine is a traditional machine tool that uses the generating method to perform gear grinding. The indexing plate, a key indexing component in this type of gear grinding machine, serves as the indexing reference for gear machining. The indexing plate on the Y7125 gear grinding machine has an indexing accuracy of 10-30 inches, capable of grinding gears of precision grades 2-3, AA-grade gear shaping cutters, and A-grade gear shaving cutters. However, for machining higher-precision gears or gear cutting tools, the indexing system of the Y7125 gear grinding machine is no longer sufficient.

[0003] The end gear indexing plate is a precision mechanical indexing device with advantages such as accurate indexing, compact structure, and no angular displacement backlash. It can achieve an indexing accuracy of over 0.2", but it can only index at specific angles and not continuously. Invention patent [ZL200910309243.2] discloses a high-precision end gear automatic indexing device for a gear grinding machine. This device uses an end gear indexing mechanism to modify the indexing system of the gear grinding machine, enabling the precision machining of high-precision standard gears with special angles. The indexing accuracy can reach 2", but the modification cost is too high, which is not conducive to commercialization.

[0004] Invention patent [CN202310811072.3] discloses a subdivision adjustment mechanism featuring continuous subdivision, high indexing accuracy, and easy operation. Based on this, invention patent [CN202211463009.7] discloses a subdividable multi-tooth automatic indexing table that can index at any angle while maintaining the indexing accuracy of the multi-tooth indexing table. Existing domestic subdividing multi-tooth automatic indexing tables have a full indexing accuracy of 0.2" and a comprehensive indexing accuracy of 1", but they only support manual indexing and are not suitable for automated equipment. Summary of the Invention

[0005] In order to solve the problems in the prior art that the indexing disk for a large flat grinding wheel gear grinding machine cannot be continuously indexed, the indexing disk for a large flat grinding wheel gear grinding machine has a low degree of automation, low inherent precision, low indexing accuracy, and complex operation, resulting in low processing precision, the present invention proposes a precision processing device for a indexing disk for a large flat grinding wheel gear grinding machine, comprising a subdivided multi-tooth automatic indexing table device arranged on a marble platform, characterized in that: a Z-axis column device is also provided on the marble platform; a precision guide rail device is provided on the Z-axis column device; a grinding device is connected to the precision guide rail device; the precision guide rail device is connected to the Z-axis column device via a fixable wedge-shaped flexible hinge structure, and the fixable wedge-shaped flexible hinge structure can prevent over-constraint of relative movement between the precision guide rail device and the Z-axis column device.

[0006] According to the precision machining device of the dividing plate for the large flat grinding wheel gear grinding machine described above, it is characterized in that: the fixed wedge-shaped flexible hinge structure includes: a slider drive frame, and a nut support seat hinged to it; the slider drive frame is a structure with two parallel symmetrical wedge blocks arranged on a rectangular block structure; the nut support seat is a cubic structure with rectangular grooves on four sides; the wedge blocks of the two slider drive frames are respectively arranged in the two rectangular grooves; cylindrical pins are symmetrically arranged on the inner side walls of the rectangular grooves; the side walls of the cylindrical pins form line contact with the working conical surface of the slider drive frame of the wedge block; the side walls of the nut support seat are provided with a loose threaded hole and a screw that matches the cylindrical pin for tightening the cylindrical pin and the wedge block along the radial direction of the cylindrical pin.

[0007] According to the above-mentioned precision processing device for the indexing plate of the large flat grinding wheel gear grinding machine, it is characterized in that: the subdividing multi-tooth automatic indexing table device comprises: a subdividing multi-tooth automatic indexing table; the subdividing multi-tooth automatic indexing table is provided with an indexing plate mounting tool connected by screws;

[0008] The indexing plate mounting fixture is a columnar structure; flanges larger than the diameter of the columnar structure are provided at both ends of the columnar structure; the parallelism between the mounting surfaces of the two flanges and the rotation accuracy of each flange are both ≤1µm; a radially adjustable indexing plate to be processed is provided on the upper end surface of the upper flange; the function of the indexing plate mounting fixture is to enable the radially adjustable indexing plate to perform high-precision rotational motion along with the subdivided multi-tooth automatic indexing table.

[0009] The precision machining device for the indexing disk of the large plane grinding wheel gear grinding machine described above is characterized in that: the Z-axis column device includes a column base plate, the column base plate is used to fix the Z-axis column device to the marble platform with bolts for fine-tuning the posture, and the column base plate is provided with a column base; the column base cross-section is L-shaped, and a reinforcing rib structure is provided on it; a coarse adjustment screw support seat is provided at the top of the column base; a column handwheel is provided on the coarse adjustment screw support seat; a coarse adjustment screw is fixedly connected to the coarse adjustment screw at the lower part of the column handwheel; a coarse adjustment guide rail is provided on the coarse adjustment guide rail; a coarse adjustment slider is matched with the coarse adjustment slider thread; the coarse adjustment screw and the coarse adjustment slider are threaded together; the column handwheel is rotated through the coarse adjustment screw connected thereto; the coarse adjustment slider is driven to move vertically along the coarse adjustment guide rail, so as to adjust the position of the coarse adjustment slider in the vertical direction to grind indexing disks of different heights;

[0010] A precision guide rail device is provided on the coarse adjustment slide block via screw connection.

[0011] According to the precision machining device for the indexing plate of the large flat grinding wheel gear grinding machine described above, it is characterized in that: a column adjustment block is provided on the column base plate; a column adjustment block threaded hole is provided in each column adjustment block for installing the column adjustment block fixing screw, and the relative position of the Z-axis column device and the radially adjustable indexing plate is fine-tuned by adjusting the position of the column adjustment block fixing screw screwed into the column adjustment block threaded hole.

[0012] The precision machining device for the indexing plate of the large flat grinding wheel gear grinding machine described above is characterized in that:

[0013] The parallelism of the upper and lower surfaces of the column base is ≤1µm;

[0014] The parallelism between the movement direction of the coarse adjustment slider and the axis of the radially adjustable indexing plate of the subdivision multi-tooth indexing table is ≤1µm.

[0015] According to the precision machining device of the dividing plate for the large plane grinding wheel gear grinding machine described above, it is characterized in that: the precision guide rail device includes: precision guide rails A and precision guide rails B which are parallel to each other and are respectively arranged on both sides of the opposite surfaces of the coarse adjustment slider guide surface; a motor bracket with a Z-shaped cross-section is provided on the top of the coarse adjustment slider; a precision drive motor is provided on the top of the motor bracket; the shaft of the precision drive motor passes through the top of the motor bracket and is connected to the fine adjustment screw; the shaft of the precision drive motor is connected to the fine adjustment screw through a coupling; a screw support seat A and a screw support seat B for fixing the position of the fine adjustment screw are also provided on the opposite surfaces of the coarse adjustment slider guide surface; the screw support seat A and the screw support seat B are respectively arranged at both ends of the fine adjustment screw; a screw nut is provided on the fine adjustment screw; the screw nut is fixedly connected to the nut support seat; the wedge block of the slider drive frame cooperates with the nut support seat, and the rectangular block surface of the slider drive frame is fixedly connected with a positive precision slider with a concave cross-section;

[0016] The two sides of the positive precision slider are respectively connected with a bearing bracket and a lateral slider, both of which have L-shaped cross-sections, by screws; the precision guide rail A is set in the groove formed by the bearing bracket and the positive precision slider; the precision guide rail B is set in the groove formed by the lateral slider and the positive precision slider;

[0017] The grinding device comprises: an electric spindle fixture; an electric spindle fixedly connected to the electric spindle fixture; a forming grinding wheel fixedly connected to the electric spindle shaft; and a base of the electric spindle fixture fixedly arranged on a positive precision slide.

[0018] According to the above-mentioned precision machining device for the indexing plate of the large flat grinding wheel gear grinding machine, it is characterized in that: the bearing bracket mounting surface and the bearing bracket working surface on the bearing bracket are provided with a bull's eye bearing;

[0019] The lateral slider working surface of the lateral slider is provided with a lateral slider plastic surface, and the lateral slider bearing working surface is provided with a bull's eye bearing;

[0020] The bull's eye bearing ball head on the mounting surface of the bearing bracket and the plastic surface of the lateral slider are in elastic contact with the lateral working surface of the precision guide rail A and the lateral working surface of the precision guide rail B respectively. The bull's eye bearing ball heads on the working surface of the bearing bracket and the bearing working surface of the lateral slider are in elastic contact with the mounting surfaces of the precision guide rail A and the precision guide rail B respectively; the positive precision slider, the lateral slider and the bearing bracket cooperate to limit the freedom of the positive precision slider so that it can only reciprocate in the vertical direction along the precision guide rails A and the precision guide rails B.

[0021] According to the precision processing device of the dividing plate for the large flat grinding wheel gear grinding machine described above, it is characterized in that: a precision slider plastic tape is provided on the forward precision slider; a lateral slider plastic tape is provided on the working surface of the lateral slider; the precision slider plastic tape and the lateral slider plastic tape are both textured, and plastic surface oil grooves are provided on them.

[0022] According to the above-mentioned precision machining device of the indexing plate for the large flat grinding wheel gear grinding machine, the feature is that an upper end organ protective cover and a lower end organ protective cover are respectively provided on the upper and lower sides of the forward precision sliding block.

[0023] The advantages of the present invention compared with the prior art are:

[0024] 1. The present invention can adjust the relative position of the radially adjustable indexing plate and the indexing plate mounting fixture by adjusting screws in radial adjustment threaded holes that cooperate with the radially adjustable indexing plate and the indexing plate mounting fixture, so that the indexing axis determined by the tooth grooves of the radially adjustable indexing plate coincides with the rotation center of the subdividing multi-tooth automatic indexing table, thereby improving the positioning accuracy of the subdividing multi-tooth automatic indexing table device. The subdividing multi-tooth automatic indexing table device has an indexing accuracy of up to ±0.5", which can make the subdivision of the radially adjustable indexing plate gear tooth angle more precise, and can subdivide tooth angles that are not divisible by 360°. At the same time, the subdividing multi-tooth automatic indexing table device has the advantages of automatic indexing function, precise indexing, and simple operation.

[0025] 2. The processing motion of the dividing plate of the present invention is divided into the reciprocating motion of the Z-axis grinding device and the rotational motion of the forming grinding wheel. The Z-axis reciprocating motion is provided by a precision guide rail device. In this device, the guide rail plastic tape is combined with the bull's eye bearing to make the dynamic and static friction coefficients of the slider plastic surface and the guide rail consistent, and there will be no low-speed crawling operation phenomenon. At the same time, the guide rail plastic tape is textured to make the vertical reciprocating motion of the positive precision slider smoother, and it is also convenient to store lubricating oil, which can play a role in lubrication and rust prevention.

[0026] 3. The precision guide rail device of the present invention adopts a fixable wedge-shaped flexible hinge structure that cooperates with the nut support seat and the slider drive frame, which eliminates the strict assembly size restrictions between the precision screw and the positive precision slider, so that the connection between the nut support seat and the slider drive frame will not over-constrain the freedom of the positive precision slider, thereby improving the motion accuracy of the precision guide rail device.

[0027] 4. The flatness of the positive working surface of the precision guide rail A and the positive working surface of the precision guide rail B of the present invention are both ≤0.5µm; the parallelism of the positive working surface of the precision guide rail A and the mounting surface of the precision guide rail A is ≤1µm, and the parallelism of the positive working surface of the precision guide rail B and the mounting surface of the precision guide rail B is ≤1µm; the parallelism of the two lateral working surfaces of the precision guide rails is within 1µm, and the flatness is within 0.5µm; the parallelism of the upper surface of the positive precision slider and the plastic-coated surface of the precision slider is within 1µm; the use of precision ground screw nuts as motion transmission parts further ensures the motion accuracy of the precision guide rail device.

[0028] 5. In the grinding device of the present invention, the parallelism of the spindle axis of the electric spindle fixture to the bottom surface is less than 1µm, and the radial runout and axial runout of the forming grinding wheel are less than 1µm, ensuring the connection accuracy of the various components in the grinding device and the movement accuracy of the forming grinding wheel during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the precision machining device of the indexing plate for the large flat grinding wheel gear grinding machine of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the subdivided multi-tooth automatic indexing table device of the present invention;

[0031] Figure 3 The three-dimensional structure of the 60-tooth modified indexing plate of the present invention is shown in FIG. Figure 1 ;

[0032] Figure 4 The three-dimensional structure of the 60-tooth modified indexing plate of the present invention is shown in FIG. Figure 2 ;

[0033] Figure 5 It is a structural schematic diagram of the indexing plate installation tool of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the Z-axis column device of the present invention;

[0035] Figure 7 Schematic diagram of the structure of the precision guide rail A of the present invention;

[0036] Figure 8 Schematic diagram of the structure of the precision guide rail device of the present invention;

[0037] Figure 9 It is a structural schematic diagram of the driving and guide rail parts of the precision guide rail device of the present invention;

[0038] Figure 10 Schematic diagram of the assembly of the coarse adjustment slider, precision guide rail A, precision guide rail B and motor bracket of the present invention;

[0039] Figure 11 This is a schematic diagram of the assembly of the nut support seat and the slider drive frame of the present invention;

[0040] Figure 12 It is a structural schematic diagram of the positive precision slider of the present invention;

[0041] Figure 13 A schematic diagram of the structure of the bearing support of the present invention;

[0042] Figure 14 It is a structural schematic diagram of the lateral slider of the present invention;

[0043] Figure 15 It is a schematic diagram of the assembly of the forward precision slider, bearing bracket and lateral slider of the present invention;

[0044] Figure 16 It is a schematic structural diagram of the grinding device of the present invention.

[0045] Figure 1: Marble platform; 2: Automatic indexing table with multiple subdivision teeth; 2-1: Automatic indexing table with multiple subdivision teeth; 2-2: Indexing plate mounting fixture; 2-3: Radially adjustable indexing plate; 2-3-1: Radially adjustable threaded hole; 2-3-3: Radial reference cylindrical surface of radially adjustable indexing plate; 2-3-4: Axial reference surface of radially adjustable indexing plate; 3: Grinding device; 3-1: Forming grinding wheel; 3-2: Electric spindle; 3-3: Electric spindle fixture; 4: Precision guide rail device; 4-1: Upper organ dust cover; 4-2: Lower organ dust cover; 4-3: Precision drive motor; 4-4: Motor bracket; 4-5: Coupling; 4-6: Screw support seat A; 4-7: Screw support seat B; 4-8: Screw nut; 4-9: Slider drive frame; 4-9-1: Slider drive frame working cone surface; 4-10: Nut support seat; 4-10-1: Loose threaded hole; 4-11: Precision screw; 4-12: Precision guide rail A; 4-12-1: Precision guide rail A mounting surface; 4-12-2: Lateral working surface of precision guide rail A; 4-12-3: Positive working surface of precision guide rail A; 4-13: Precision guide rail B; 4-13-1: Mounting surface of precision guide rail B; 4-13-2: Lateral working surface of precision guide rail B; 4-13-3: Positive working surface of precision guide rail B; 4-14: Positive precision slider; 4-14-1: Upper surface of positive precision slider; 4-15: Plastic tape for precision slider; 4-16: Bearing bracket; 4-16-1: Mounting surface of bearing bracket ;4-16-2: Bearing bracket working surface;4-17: Bull's eye bearing;4-18: Lateral slider;4-18-1: Lateral slider working surface;4-18-2: Lateral slider bearing working surface;4-19: Lateral slider plastic tape;4-20: Cylindrical pin;5: Z-axis column assembly;5-1: Column handwheel;5-2: Coarse adjustment screw support seat;5-3: Coarse adjustment screw;5-4: Coarse adjustment slider;5-5: Column base;5-6: Column adjustment block;5-7: Column base plate; DETAILED DESCRIPTION

[0046] Preferred embodiment:

[0047] like Figure 1 As shown: A precision processing device for a dividing plate for a large flat grinding wheel gear grinding machine includes a subdivided multi-tooth automatic dividing table device 2 arranged on a marble platform 1, and a Z-axis column device 5 is also provided on the marble platform 1; a precision guide rail device 4 is provided on the Z-axis column device 5; the precision guide rail device 4 is connected to the grinding device 3; the precision guide rail device 4 is connected to the Z-axis column device 5 through a fixable wedge-shaped flexible hinge structure, and the fixable wedge-shaped flexible hinge structure can prevent over-constraint of the relative movement between the precision guide rail device 4 and the Z-axis column device 5.

[0048] like Figure 11As shown: the fixable wedge-shaped flexible hinge structure includes: a slider drive frame 4-9, and a nut support seat 4-10 hinged to it; the slider drive frame 4-9 is a structure with two parallel symmetrical wedge blocks arranged on a rectangular block structure; the nut support seat 4-10 is a cubic structure with rectangular grooves on four sides; the wedge blocks of the two slider drive frames 4-9 are respectively arranged in two rectangular grooves; cylindrical pins 4-20 are symmetrically arranged on the inner side walls of the rectangular grooves; the side walls of the cylindrical pins 4-20 form line contact with the working conical surface 4-9-1 of the slider drive frame of the wedge block; the side walls of the nut support seat 4-10 are provided with a tightening threaded hole 4-10-1 and a screw matching it that can tighten the cylindrical pin 4-20 and the wedge block along the radial direction of the cylindrical pin 4-20.

[0049] like Figure 2 As shown: the subdivided multi-tooth automatic indexing table device 2 includes: a subdivided multi-tooth automatic indexing table 2-1; a subdivided multi-tooth automatic indexing table 2-1 is provided with an indexing plate mounting fixture 2-2 connected by screws;

[0050] The indexing plate mounting fixture 2-2 is a columnar structure; flanges larger than the diameter of the columnar structure are provided at both ends of the columnar structure; the parallelism between the mounting surfaces of the two flanges and the rotational accuracy of each flange are both ≤1µm; a radially adjustable indexing plate 2-3 to be processed is provided on the upper end surface of the upper flange; the function of the indexing plate mounting fixture 2-2 is to enable the radially adjustable indexing plate 2-3 to perform high-precision rotational motion along with the subdivided multi-tooth automatic indexing table 2-1.

[0051] like Figure 6 As shown: the Z-axis column device 5 includes a column base plate 5-7, which is used to fix the Z-axis column device 5 to the marble platform with bolts so that the posture can be finely adjusted. A column base 5-5 is provided on the column base plate 5-7; the column base 5-5 has an L-shaped cross-section and is provided with a reinforcing rib structure; a coarse adjustment screw support seat 5-2 is provided on the top of the column base 5-5; a column handwheel 5-1 is provided on the coarse adjustment screw support seat 5-2; the lower part of the column handwheel 5-1 is fixed A coarse adjustment screw rod 5-3 is connected; a coarse adjustment guide rail is provided on the column base 5-5 along the axial direction of the coarse adjustment screw rod 5-3; a coarse adjustment slider 5-4 is provided on the coarse adjustment guide rail; the coarse adjustment screw rod 5-3 and the coarse adjustment slider 5-4 are threadedly engaged; rotating the column hand wheel 5-1 drives the coarse adjustment slider 5-4 to move vertically along the coarse adjustment guide rail through the coarse adjustment screw rod 5-3 connected thereto, so as to adjust the vertical position of the coarse adjustment slider 5-4 to grind indexing plates of different heights;

[0052] A precision guide rail device 4 is provided on the coarse adjustment slider 5 - 4 via screw connection.

[0053] A column adjustment block 5-6 is provided on the column base plate 5-7; a column adjustment block threaded hole is provided in each column adjustment block 5-6 for installing the column adjustment block fixing screw, and the position of the column adjustment block fixing screw is adjusted to be screwed into the column adjustment block threaded hole to fine-tune the relative position of the Z-axis column device 5 and the radially adjustable dividing plate 2-3.

[0054] The parallelism of the upper and lower surfaces of the column base plates 5-7 is ≤1µm;

[0055] The parallelism between the movement direction of the coarse adjustment slider 5-4 and the axis of the radially adjustable dividing plate 2-3 of the subdivision multi-tooth dividing table 2-1 is ≤1µm.

[0056] like Figure 8-15 As shown: the precision guide rail device 4 includes: precision guide rails A4-12 and precision guide rails B4-13, which are parallel to each other and are respectively arranged on both sides of the opposite surfaces of the guide rail surface of the coarse adjustment slider 5-4; a motor bracket 4-4 with a Z-shaped cross section is arranged on the top of the coarse adjustment slider 5-4; a precision drive motor 4-3 is arranged on the top of the motor bracket 4-4; the shaft of the precision drive motor 4-3 passes through the top of the motor bracket 4-4 and is connected to the fine adjustment screw rod 4-11; the shaft of the precision drive motor 4-3 is connected to the fine adjustment screw rod 4-11 through the coupling 4-5; the guide rail surface of the coarse adjustment slider 5-4 On the opposite surface, there are also provided with a screw support seat A4-6 and a screw support seat B4-7 for fixing the position of the fine-adjusting screw 4-11; the screw support seat A4-6 and the screw support seat B4-7 are respectively arranged at both ends of the fine-adjusting screw 4-11; the fine-adjusting screw 4-11 is matched with a screw nut 4-8; the screw nut 4-8 is fixedly connected to the nut support seat 4-10; the wedge block of the slider drive frame 4-9 is matched with the nut support seat 4-10, and the surface of the rectangular block of the slider drive frame 4-9 is fixedly connected with a positive precision slider 4-14 with a concave cross-section;

[0057] The two sides of the forward precision slider 4-14 are respectively screwed with a bearing bracket 4-16 and a lateral slider 4-18, both of which have L-shaped cross-sections; the precision guide rail A4-12 is set in the groove formed by the bearing bracket 4-16 and the forward precision slider 4-14; the precision guide rail B4-13 is set in the groove formed by the lateral slider 4-18 and the forward precision slider 4-14;

[0058] like Figure 16 As shown: the grinding device includes: an electric spindle fixture 3-3; an electric spindle 3-2 is fixedly connected to the electric spindle fixture 3-3; a forming grinding wheel 3-1 is fixedly connected to the electric spindle 3-2; the base of the electric spindle fixture 3-3 is fixedly set on the positive precision slider 4-14.

[0059] A bull's eye bearing 4-17 is provided on the bearing bracket mounting surface 4-16-1 and the bearing bracket working surface 4-16-2 of the bearing bracket 4-16;

[0060] The lateral slider working surface 4-18-1 on the lateral slider 4-18 is provided with a lateral slider plastic surface 4-19, and the lateral slider bearing working surface 4-18-2 is provided with a bull's eye bearing 4-17;

[0061] The ball head of the bull's eye bearing 4-17 of the bearing bracket mounting surface 4-16-1 and the plastic surface 4-19 of the lateral slider are in elastic contact with the lateral working surface 4-12-2 of the precision guide rail A and the lateral working surface 4-13-2 of the precision guide rail B respectively; the ball heads of the bull's eye bearing of the bearing bracket working surface 4-16-2 and the lateral slider bearing working surface 4-18-2 are in elastic contact with the mounting surfaces of the precision guide rail A4-12 and the precision guide rail B4-13 respectively; the forward precision slider 4-14, the lateral slider 4-18 and the bearing bracket 4-16 cooperate to limit the degree of freedom of the forward precision slider 4-14 so that it can only reciprocate in the vertical direction along the precision guide rails A4-12 and the precision guide rail B4-13.

[0062] A precision slider plastic tape 4-15 is provided on the forward precision slider 4-14; a lateral slider plastic tape 4-19 is provided on the lateral slider working surface 4-18-1; the precision slider plastic tape 4-15 and the lateral slider plastic tape 4-19 are both textured, and plastic surface oil grooves are provided on them.

[0063] An upper organ protective cover 4-1 and a lower organ protective cover 4-2 are respectively provided on the upper and lower sides of the forward precision slider 4-14.

[0064] The parallelism accuracy and rotation accuracy of the end face of the indexing plate installation fixture 2-2 are both ≤1µm, and the parallelism of the upper and lower end faces is controlled by grinding to ≤1µm, which can ensure that the axial runout and radial runout of the radially adjustable indexing plate 2-3 are ≤1µm when rotating with the subdivided multi-tooth automatic indexing table 2-1;

[0065] Four evenly distributed radial adjustment threaded holes 2-3-1 are provided on the outer cylindrical surface of the radially adjustable indexing disk 2-3. Set screws are installed in the radial adjustment threaded holes 2-3-1 to adjust the coaxiality of the radially adjustable indexing disk 2-3 and the subdivided multi-tooth indexing table 2-1. The flatness of the inner diameter end surface of the radially adjustable indexing disk 2-3 is controlled by grinding. This end surface serves as the axial positioning reference of the radially adjustable indexing disk 2-3; a radial reference cylindrical surface 2-3-3 of the radially adjustable indexing disk is machined on the outer cylindrical surface of the radially adjustable indexing disk 2-3, which serves as the radial installation reference of the radially adjustable indexing disk 2-3 and the radial reference reference during measurement.

[0066] Each column adjustment block 5-6 of the Z-axis column device 5 is provided with a threaded hole for installing a set screw, and the position of the set screw screwed into the threaded hole is adjusted to fine-tune the relative position of the Z-axis column device 5 and the radially adjustable indexing plate 2-3;

[0067] The parallelism of the upper and lower surfaces of the column base plate 5-7 is ≤1µm, and the parallelism of the movement direction of the positive precision slide 4-14 and the axis of the subdivided multi-tooth automatic indexing table 2-1 is controlled by grinding to be ≤1µm;

[0068] The journal of the coarse adjustment screw 5-3 and the bearing in the coarse adjustment screw support seat 5-2 are connected by interference fit.

[0069] The precision slider plastic strip 4-15 of the forward precision slider 4-14 and the lateral slider working surface 4-18-1 are both plastic-coated. The plastic-coating process is to give a texture to the plastic-coated surface and make an oil groove on the plastic-coated surface, which is beneficial to reduce the friction of the precision slider on the rectangular guide rail and also helps to store lubricating oil to play a role in rust prevention and lubrication. After the texturing, the plastic-coated surface is ground to control the plastic-coated flatness to ≤0.5µm.

[0070] The positive precision slider 4-14 is ground to control the parallelism of the surface where the precision slider plastic tape 4-15 contacts the positive precision slider 4-14 to be ≤1µm;

[0071] Install the upper organ protective cover 4-1 and the lower organ protective cover 4-2 on both sides of the precision slider to cover the precision screw nut structure inside the positive precision slider 4-14 to prevent abrasive particles and dust from entering;

[0072] The contact relationship between the nut support seat 4-10 and the slider drive frame 4-9 is formed by the linear contact between the cylindrical pin 4-20 and the working conical surface 4-9-1 of the slider drive frame. There is no strict assembly size limit, and their relative positions can adapt to changes according to the distance from the rotation center of the precision screw 4-11 to the working surface of the positive precision slider 4-14, so that the connection between the nut support seat 4-10 and the slider drive frame 4-9 will not over-constrain the freedom of the positive precision slider 4-14, thereby improving the motion accuracy of the precision guide rail device 4.

[0073] The parallelism between the axis of the inner hole of the electric spindle fixture 3-3 and the mounting surface of the electric spindle fixture 3-3 is ≤1µm by grinding, and the electric spindle fixture 3-3 is mounted on the upper surface 4-14-1 of the positive precision slide;

[0074] The radial runout and axial runout of the forming grinding wheel 3-1 must be ground to an accuracy of ≤1µm to ensure that the forming grinding wheel 3-1 can run smoothly. The inner hole of the forming grinding wheel 3-1 and the electric spindle fixture 3-3 are installed with clearance fit and then locked by screws. The grinding cross-section of the forming grinding wheel 3-1 is the shape of the indexing plate tooth groove.

[0075] The processing accuracy of the traditional large flat grinding wheel gear grinding machine indexing plate can only be guaranteed by the clamping fixture. The present invention first refines the large flat grinding wheel gear grinding machine indexing plate. The refinement and transformation method of the large flat grinding wheel gear grinding machine indexing plate is specifically implemented as follows:

[0076] Step 1: First, use a grinding tool and abrasive to trim the axial reference surface 2-3-4 of the radially adjustable indexing plate of the large flat grinding wheel gear grinding machine so that its surface flatness reaches 1µm. At this time, this surface can be used as the installation reference of the radially adjustable indexing plate 2-3 in the axial direction.

[0077] Step 2: Process four evenly distributed adjustment threaded holes 2-3-3 on the outer cylindrical surface of the radially adjustable indexing plate 2-3, then install the radially adjustable indexing plate 2-3 on the indexing plate mounting fixture 2-2 by screw connection, screw the set screw into the radial adjustment threaded hole 2-3-1, and adjust the set screw to make the indexing axis of the radially adjustable indexing plate 2-3 determined by the tooth groove coincide with the axis of the indexing plate mounting fixture 2-2.

[0078] Step 3: Install the radially adjustable indexing plate 2-3 and the indexing plate mounting fixture 2-2 on the precision lathe, calibrate the position of the indexing plate mounting fixture 2-2 on the ultra-precision lathe so that its rotation center coincides with the rotation center of the ultra-precision lathe, and then start the ultra-precision lathe to fine-machine the outer cylindrical surface of the boss of the radially adjustable indexing plate 2-3, and use the finely machined radial reference cylindrical surface 2-3-3 of the radially adjustable indexing plate as the precise reference surface in the radial direction.

[0079] The influence of the 2-3 installation eccentricity of the radially adjustable indexing plate on its indexing error shows a first harmonic change trend. If the indexing error curve of the measured indexing plate contains a first harmonic component, no matter what the cause, it can be compensated by radially adjusting the indexing plate. This method is the "sine subtraction method" proposed by Academician Wang Liding in the early 1960s (see Baidu Encyclopedia). The specific steps for using the "sine subtraction method" to improve the indexing accuracy of the indexing plate are as follows:

[0080] Step 1: First, transform the structure of the indexing plate into a radially adjustable indexing plate 2-3, add four radial adjustment threaded holes 2-3-1 radially, and machine a aligning circle, that is, the radial reference cylindrical surface 2-3-3 of the radially adjustable indexing plate.

[0081] Step 2: Use a precision goniometer, precision turntable or other angle measuring instrument to measure the indexing error curve of the radially adjustable indexing plate 2-3.

[0082] Step 3: Use the least squares method to fit the error curve and calculate the radial adjustment amount and adjustment azimuth of the radially adjustable indexing plate 2-3.

[0083] Step 4: Adjust the radially adjustable indexing plate 2-3 according to the theoretical adjustment amount and adjustment direction, and remeasure the indexing error of the radially adjustable indexing plate 2-3. If the indexing error curve of the radially adjustable indexing plate 2-3 still contains a first harmonic component after one adjustment, repeat steps 3 and 4 for multiple adjustments. Theoretically, the first harmonic component of the error curve of the radially adjustable indexing plate 2-3 can be completely compensated using the "sine subtraction method."

[0084] Step 5: When there is no obvious first harmonic component in the error curve of the radially adjustable indexing plate 2 - 3 , stop adjusting the radially adjustable indexing plate 2 - 3 .

[0085] The precision processing device of the dividing plate for the Y7125 large flat grinding wheel gear grinding machine includes a subdivided multi-tooth automatic dividing table device 2, a Z-axis column device 5, a precision guide rail device 4, and a grinding device 3; the subdivided multi-tooth automatic dividing table 2-1 and the Z-axis column device 5 are fixed to the marble table 1 by screws, the precision guide rail device 4 is installed on the coarse adjustment slider 5-4 in the Z-axis column device 5, and the grinding device 3 is installed on the precision slider 4-11 in the precision guide rail device 4.

[0086] In the Z-axis column device 5, the column base plate 5-7 is fixed to the marble table 1 by screw connection, the column base 5-5 is fixed to the column base plate 5-7 by screw connection, and the column adjustment block 5-6 is fixed to the column base plate 5-7 by screw connection; a set screw is screwed into the threaded hole of the column adjustment block 5-6, and the relative position of the Z-axis column device 5 and the radially adjustable indexing plate 2-3 is adjusted by adjusting the depth of the set screw into the threaded hole; the shaft diameter of the coarse adjustment screw 5-3 is related to the coarse adjustment screw support The rolling bearing in the seat 5-2 is interference fit. At the same time, the coarse adjustment screw 5-3 is fixed to the column handwheel 5-1 by a threaded connection, and the coarse adjustment screw support seat 5-2 is fixed to the column base 5-5 by a screw connection. The guide surface of the coarse adjustment slider 5-4 is aligned with the guide surface of the column base 5-5 and installed. At the same time, the other end of the coarse adjustment screw 5-3 is connected to the nut of the coarse adjustment slider 5-4 by a thread. The screw is driven to rotate through the column handwheel 5-1 to control the up and down movement of the slider in the vertical direction.

[0087] In the precision guide rail device 4, the precision guide rail A4-12 and the precision guide rail B4-13 are first ground to control the flatness of the positive working surface 4-12-3 of the precision guide rail A and the lateral working surface 4-12-2 of the precision guide rail A to be less than 0.5µm, and the parallelism of the positive working surface 4-12-3 of the precision guide rail A and the mounting surface 4-12-1 of the precision guide rail A to be less than 1µm;

[0088] Control the flatness of the positive working surface 4-13-3 of the precision guide rail B and the lateral working surface 4-13-2 of the precision guide rail A to be less than 0.5µm, and make the parallelism of the positive working surface 4-13-3 of the precision guide rail A and the mounting surface 4-13-1 of the precision guide rail A less than 1µm;

[0089] The height difference between the precision guide rail A4-12 and the precision guide rail B4-13 is controlled to be less than 1µm (the height difference is the distance between the positive working surface of the guide rail and the guide rail mounting surface);

[0090] Then, the precision guide rails A4-12 and B4-13 are installed on both sides of the coarse adjustment slider 5-4 by screw connection, and the parallelism of the precision guide rails to the working surfaces 4-12-2 on both sides is controlled to be less than 1µm; the precision guide rails A4-12, B4-13 and the coarse adjustment slider 5-4 are installed together for integral grinding processing, and the flatness of the positive working surfaces 4-12-3 of the two precision guide rails is controlled to be less than 0.5µm, and the parallelism of the positive working surface 4-12-3 of the precision guide rail A and the bottom surface of the positive precision slider 4-14 is less than 1µm. After completing the above processing, the coarse adjustment slider 5-4 is then installed on the column base 5-5;

[0091] Install the screw support seat A4-6 and the screw support seat B4-7 on both ends of the upper surface of the coarse adjustment slider 5-4 by screw connection, install the nut support seat 4-10 on the screw nut 4-8 by screw connection, install the motor bracket 4-4 on the upper end surface of the coarse adjustment slider 5-4 by screw connection, install the precision drive motor 4-3 on the motor bracket 4-4 by screw connection, and connect the precision drive motor shaft to the precision screw 4-11 through the coupling 4-5; fix the precision guide rail A4-12 and the precision guide rail B4-13 to the upper surface of the coarse adjustment slider 5-4 by screw connection;

[0092] A precision slider plastic tape 4-15 is provided on the forward precision slider 4-14; the precision slider plastic tape 4-15 and the lateral slider working surface 4-18-1 are plastic-laminated, and the plastic tape is textured after the plastic lamination, and the precision slider plastic tape 4-15 and the lateral slider plastic tape 4-19 are ground to control their flatness to be less than 0.5µm; the parallelism of the upper surface 4-14-1 of the forward precision slider and the bottom surface of the precision slider plastic tape 4-15 is controlled to be less than 1µm by grinding; the bearing bracket mounting surface 4-16-1, the bearing bracket working surface 4-16-2, and the lateral The working surfaces 4-18-2 of the slider bearings are respectively installed with the bull's eye bearings 4-17, and then the positive precision slider 4-14 is fixed to the slider drive frame 4-9 by screw connection. At this time, the precision slider plastic tape 4-15 is fitted with the positive working surface 4-12-3 of the precision guide rail, and the working conical surface 4-9-1 of the slider drive frame is installed into the groove of the nut support seat 4-10. The cylindrical pins 4-20 are respectively installed, and the set screws in the anti-loosening threaded holes 4-10-1 are tightened to make the cylindrical pins 4-20 and the working conical surface 4-9-1 of the slider drive frame form line contact, thereby fixing each other;

[0093] First, move the slider drive frame 4-9 into the rectangular groove of the nut support seat 4-10. At this time, there is a gap between the slider drive frame 4-9 and the nut support seat 4-10. After the positive precision slider 4-14 moves for a while and adapts to the movement gap, the cylindrical pin 4-20 is installed into the groove. Because the cylindrical pin 4-20 is in contact with the working conical surface 4-9-1 of the slider drive frame, when all four cylindrical pins 4-20 are in contact with the working conical surface 4-9-1 of the slider drive frame, their positions will be fixed. The tightness of the fixing force can be adjusted by loosening the set screw in the threaded hole 4-10-1.

[0094] Then install the bearing bracket 4-16 and the lateral slider 4-18 on both sides of the positive precision slider 4-14 respectively. The ball head of the bull's eye bearing 4-17 of the bearing bracket mounting surface 4-16-1 and the plastic tape 4-19 of the lateral slider are in contact with the lateral working surface 4-12-2 of the precision guide rail respectively. The ball head of the bull's eye bearing 4-17 of the bearing bracket working surface 4-16-2 and the lateral slider bearing working surface 4-18-2 are in contact with the precision guide rail mounting surface 4-12-1 respectively. The positive precision slider 4-14 and the bearing bracket are in contact with the lateral working surface 4-12-2 of the precision guide rail respectively. 4-16 and the lateral slider 4-18 cooperate with each other to limit the freedom of the forward precision slider 4-14, so that it can only make up and down reciprocating motion along the rectangular guide rail in the Z direction; the reciprocating motion of the forward precision slider 4-14 in the Z direction is driven by the precision drive motor 4-3 to drive the precision screw 4-11 to rotate, and the rotational motion is converted into linear motion through the screw nut pair; finally, the upper end accordion cover 4-1 and the lower end accordion cover 4-2 are connected by screws and installed in the precision guide rail device 4 to provide dust protection.

[0095] In the grinding device 3, the electric spindle fixture 3-3 needs to control the parallelism of its installation axis to the installation bottom surface to be less than 1µm through grinding, and the radial runout and axial runout of the outer diameter of the grinding device 3-1 are both controlled to be less than 1µm; the electric spindle fixture 3-3 is installed on the positive precision slider 4-14, the electric spindle 3-2 is installed in the electric spindle fixture 3-3, and finally the forming grinding wheel 3-1 is installed on the electric spindle 3-2.

[0096] The subdivided multi-tooth automatic indexing table 2-1 described in the present invention adopts an automatic indexing device based on a subdivided multi-tooth indexing table disclosed in the invention patent application [CN202410439999.3]. It adopts a sub-drive mechanism, a coarse indexing drive mechanism, and a lifting drive mechanism, which are respectively combined with the subdivided multi-tooth indexing table. This ensures that the subdivided multi-tooth indexing table has high precision, with an indexing accuracy of up to 0.2", and realizes automatic indexing of any angle of the automatic indexing device. At the same time, it reduces the cost of the automatic indexing device, is easy to manufacture, and is simple to operate. The automatic indexing device of the subdivided multi-tooth indexing table can not only be used in conjunction with a modular fixture component, but can also be used independently for general machine tool processing such as drilling, milling, planing, boring, and grinding of precision parts with high angle requirements. The use of the subdivided multi-tooth automatic indexing table 2-1 in the present invention can realize fixed-angle indexing of any angle of the radially adjustable indexing disk 2-3, and can also perform subdivided indexing for indexing disk indexing angles that are not divisible by 360°. The subdivided multi-tooth automatic indexing table 2 can realize automatic indexing and reduce the error of manual indexing.

[0097] The implementation method of the precision machining device for the indexing plate of the Y7125 large flat grinding wheel gear grinding machine takes the machining of a radially adjustable indexing plate with 60 teeth or 35 teeth as an example. The implementation steps of the indexing plate machining device are as follows:

[0098] Step 1: First, fix the indexing plate installation tool 2-2 to the table surface of the subdivided multi-tooth automatic indexing table 2-1 by screw connection, then fit the axial reference surface 2-3-4 of the radially adjustable indexing plate to the upper surface of the indexing plate installation tool 2-2, and fix the radially adjustable indexing plate 2-3 to the indexing plate installation tool 2-2 by screw connection;

[0099] Step 2: Adjust the set screw in the threaded hole 2-3-3 to ensure that the axis of the radially adjustable indexing plate 2-3 is consistent with the rotation center line of the subdivided multi-tooth automatic indexing table 2-1.

[0100] Step 3: Rotate the column hand wheel 5-1 and adjust the height of the coarse adjustment slider 5-4 to position the grinding device 3 to a position suitable for processing the indexing plate.

[0101] Step 4: Start the electric spindle 3-2 to rotate the forming grinding wheel 3-1, adjust the column adjustment block 5-6 on the column base plate 5-7 to change the radial position of the grinding device 3 relative to the radially adjustable indexing plate 2-3, and align the forming grinding wheel 3-1 with the radially adjustable indexing plate 2-3.

[0102] Step 5: After the tool setting is completed, start the stepper motor 4-3 to make the precision slide 4-11 reciprocate in the vertical direction. At this time, the forming grinding wheel 3-1 is also in rotation, and the grinding movement of the radially adjustable indexing plate 2-3 has begun.

[0103] Step 6: After completing the gear grinding process of the first radially adjustable indexing disk 2-3, control the stepper motor 4-3 to move upward to the position away from the radially adjustable indexing disk 2-3, and then subdivide the multi-tooth automatic indexing table device 2-1 to rotate 6°, and bring the next gear tooth to be ground to the grinding position. At this time, start the stepper motor 4-3 to control the precision slider 4-11 to do reciprocating motion to grind the gear teeth of the radially adjustable indexing disk 2-3. Follow this process until all 60 gear teeth of the indexing disk are ground, and the fine processing of the indexing disk is completed.

[0104] If the number of teeth of the radially adjustable indexing plate 2-3 being processed is not divisible by 360°, such as a 35-tooth radially adjustable indexing plate, the angle of each rotation of the subdivided multi-tooth automatic indexing table device 2-1 is 360 / 35=10°17′9″. The remaining operating steps are the same as those for a 60-tooth radially adjustable indexing plate.

Claims

1. A precision machining device for a large flat grinding wheel gear grinding machine indexing plate, comprising a multi-tooth automatic indexing table device (2) arranged on a marble platform (1), characterized in that: A Z-axis column device (5) is also provided on the marble platform (1); a precision guide rail device (4) is provided on the Z-axis column device (5); a grinding device (3) is connected to the precision guide rail device (4); the precision guide rail device (4) is connected to the Z-axis column device (5) via a fixed wedge-shaped flexible hinge structure, and the fixed wedge-shaped flexible hinge structure can prevent over-constraint of relative movement between the precision guide rail device (4) and the Z-axis column device (5); The fixed wedge-shaped flexible hinge structure comprises: a slider drive frame (4-9) and a nut support seat (4-10) hingedly connected thereto; The slider drive frame (4-9) is a structure in which two parallel symmetrical wedge blocks are arranged on a rectangular block structure; the nut support seat (4-10) is a cubic structure with rectangular grooves on four sides; the wedge blocks of the two slider drive frames (4-9) are respectively arranged in the two rectangular grooves; cylindrical pins (4-20) are symmetrically arranged on the inner side walls of the rectangular grooves; the side walls of the cylindrical pins (4-20) form linear contact with the slider drive frame working conical surface (4-9-1) of the wedge block; and the side walls of the nut support seat (4-10) are provided with a loosening threaded hole (4-10-1) and a screw matched therewith for fastening the cylindrical pin (4-20) and the wedge block along the radial direction of the cylindrical pin (4-20).

2. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 1, characterized in that: The subdivided multi-tooth automatic indexing table device (2) comprises: a subdivided multi-tooth automatic indexing table (2-1); a subdivided multi-tooth automatic indexing table (2-1) is provided with an indexing plate mounting tool (2-2) connected by screws; The indexing plate mounting fixture (2-2) is a columnar structure; flanges larger than the diameter of the columnar structure are provided at both ends of the columnar structure; the parallelism between the mounting surfaces of the two flanges and the rotational accuracy of each flange are both ≤1μm; a radially adjustable indexing plate (2-3) to be processed is provided on the upper end surface of the upper flange; the function of the indexing plate mounting fixture (2-2) is to enable the radially adjustable indexing plate (2-3) to perform high-precision rotational motion along with the subdivided multi-tooth automatic indexing table (2-1).

3. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 1 or 2, characterized in that: The Z-axis column device (5) comprises a column base plate (5-7), the column base plate (5-7) is used to fix the Z-axis column device (5) to a marble platform with bolts so that the Z-axis column device (5) can be finely adjusted in posture, and a column base (5-5) is provided on the column base plate (5-7); the column base (5-5) has an L-shaped cross section and is provided with a reinforcing rib structure; a coarse adjustment screw rod support seat (5-2) is provided on the top of the column base (5-5); a column hand wheel (5-1) is provided on the coarse adjustment screw rod support seat (5-2); the lower part of the column hand wheel (5-1) is fixed A coarse adjustment screw rod (5-3) is fixedly connected; a coarse adjustment guide rail is provided on the column base (5-5) along the axial direction of the coarse adjustment screw rod (5-3); a coarse adjustment slider (5-4) is provided on the coarse adjustment guide rail; the coarse adjustment screw rod (5-3) and the coarse adjustment slider (5-4) are threadedly engaged; the column hand wheel (5-1) is rotated to drive the coarse adjustment slider (5-4) to move vertically along the coarse adjustment guide rail through the coarse adjustment screw rod (5-3) connected thereto, so as to adjust the vertical position of the coarse adjustment slider (5-4) so ​​as to grind indexing plates of different heights; A precision guide rail device (4) is provided on the coarse adjustment slider (5-4) via screw connection.

4. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 3, characterized in that: A column adjustment block (5-6) is provided on the column base plate (5-7); a column adjustment block threaded hole is provided in each column adjustment block (5-6) for installing a column adjustment block set screw, and the position of the column adjustment block set screw screwed into the column adjustment block threaded hole is adjusted to fine-tune the relative position of the Z-axis column device (5) and the radially adjustable indexing disk (2-3).

5. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 4, characterized in that: The parallelism of the upper and lower surfaces of the column base plate (5-7) is ≤1μm; The parallelism between the movement direction of the coarse adjustment slider (5-4) and the axis of the radially adjustable dividing plate (2-3) of the subdivided multi-tooth dividing table (2-1) is ≤1μm.

6. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 5, characterized in that: The precision guide rail device (4) comprises: precision guide rails A (4-12) and precision guide rails B (4-13) which are respectively arranged on both sides of the opposite surfaces of the guide rail surface of the coarse adjustment slider (5-4); a motor bracket (4-4) with a Z-shaped cross section is arranged on the top of the coarse adjustment slider (5-4); a precision drive motor (4-3) is arranged on the top of the motor bracket (4-4); the shaft of the precision drive motor (4-3) passes through the top of the motor bracket (4-4) and is connected to the fine adjustment screw rod (4-11); the shaft of the precision drive motor (4-3) is connected to the fine adjustment screw rod (4-11) through a coupling (4-5); the guide rail surface of the coarse adjustment slider (5-4) The opposite surfaces are also provided with a screw support seat A (4-6) and a screw support seat B (4-7) for fixing the position of the fine adjustment screw (4-11); the screw support seat A (4-6) and the screw support seat B (4-7) are respectively provided at both ends of the fine adjustment screw (4-11); a screw nut (4-8) is provided on the fine adjustment screw (4-11); the screw nut (4-8) is fixedly connected to the nut support seat (4-10); the wedge block of the slider drive frame (4-9) is matched with the nut support seat (4-10), and a positive precision slider (4-14) with a concave cross section is fixedly connected to the surface of the rectangular block of the slider drive frame (4-9); A bearing bracket (4-16) and a lateral slider (4-18) both having L-shaped cross sections are screwed to both sides of the forward precision slider (4-14); a precision guide rail A (4-12) is arranged in a groove formed by the bearing bracket (4-16) and the forward precision slider (4-14); and a precision guide rail B (4-13) is arranged in a groove formed by the lateral slider (4-18) and the forward precision slider (4-14). The grinding device comprises: an electric spindle fixture (3-3); an electric spindle (3-2) fixedly connected to the electric spindle fixture (3-3); a forming grinding wheel (3-1) fixedly connected to the axis of the electric spindle (3-2); and a base of the electric spindle fixture (3-3) fixedly arranged on a positive precision slider (4-14).

7. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 6, characterized in that: A bull's eye bearing (4-17) is provided on a bearing bracket mounting surface (4-16-1) and a bearing bracket working surface (4-16-2) on the bearing bracket (4-16); A lateral slider plastic tape (4-19) is provided on a lateral slider working surface (4-18-1) on the lateral slider (4-18), and a bull's eye bearing (4-17) is provided on a lateral slider bearing working surface (4-18-2); The ball head of the bull's eye bearing (4-17) on the mounting surface (4-16-1) of the bearing bracket and the plastic tape (4-19) of the lateral slider are in elastic contact with the lateral working surface (4-12-2) of the precision guide rail A and the lateral working surface (4-13-2) of the precision guide rail B respectively. The ball heads of the bull's eye bearing on the working surface (4-16-2) of the bearing bracket and the bearing working surface (4-18-2) of the lateral slider are in elastic contact with the mounting surfaces of the precision guide rail A (4-12) and the precision guide rail B (4-13) respectively. The positive precision slider (4-14), the lateral slider (4-18) and the bearing bracket (4-16) cooperate to limit the degree of freedom of the positive precision slider (4-14) so ​​that it can only perform reciprocating motion in the vertical direction along the precision guide rails A (4-12) and the precision guide rail B (4-13).

8. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 7, characterized in that: A precision slider plastic tape (4-15) is provided on the forward precision slider (4-14); a lateral slider plastic tape (4-19) is provided on the lateral slider working surface (4-18-1); the precision slider plastic tape (4-15) and the lateral slider plastic tape (4-19) are both textured, and plastic surface oil grooves are provided on them.

9. The precision machining device for a large flat grinding wheel gear grinding machine indexing plate according to claim 8, characterized in that: An upper accordion protective cover (4-1) and a lower accordion protective cover (4-2) are respectively provided on the upper and lower sides of the forward precision slider (4-14).

Images