Disc workpiece positioning device without fixed clamping and grinding machine

Abstract

The invention discloses a disc workpiece positioning device without fixed clamping and a grinding machine, the disc workpiece positioning device without fixed clamping is characterized in that a dial wheel, a rotary driving device and a fulcrum shaft are arranged, the fulcrum shaft is driven by the rotary driving device, the dial wheel is arranged on the fulcrum shaft, and the dial wheel is driven by the rotary driving device. Limiting parts which are matched with a workpiece and limit circumferential rotation of the workpiece are arranged on the outer circle portion of the shifting wheel at intervals so as to limit circumferential rotation of the workpiece relative to the shifting wheel, and the workpiece is not axially fixed and clamped. Due to the adoption of the structure, the non-fixed clamping disc type workpiece positioning device and the linear guide rail reciprocating driving device have the advantages of novel structure, high machining speed, high machining efficiency, low machining cost, high machining quality and the like.

Description

[0001] This application claims priority to Chinese Patent Application No. 2023111293984 filed on September 4, 2023, entitled Disk-type workpiece positioning device and grinder without fixed clamping. Technical Field

[0002] The invention relates to the technical field of grinding equipment, in particular to a disc-type workpiece positioning device without fixed clamping and a grinding machine. Background Art

[0003] As we all know, the automobile braking system is a key component of the automobile. The brake pad and the brake disc form a pair of friction pairs, and the braking function is achieved through the braking of the brake pad pair.

[0004] Carbon ceramic composite brake material is a multiphase composite brake material developed in the 1990s with high-strength carbon fiber as reinforcement and pyrolytic carbon, silicon carbide (SiC) and other materials as the matrix. It is based on carbon / carbon composite brake materials and introduces "1. Carbon ceramic brake discs have very little loss during friction, which is the biggest advantage compared to metal brake discs. When the brake disc is rubbed, the metal brake disc will make more or less noise, while carbon ceramic brake discs usually do not make abnormal noise. 2. Regarding the service life, the service life of carbon ceramic brake discs is much longer than that of ordinary brake discs. 3. Carbon ceramic brake discs have good physical properties, and the mechanical strength of carbon ceramic brake discs is very high. They can withstand large shear forces and pressures, and the heat dissipation is also very fast. 4. The braking performance of carbon ceramic brake discs is also very good and resistant to high temperatures. If you want braking performance To achieve better performance, a higher friction coefficient is selected. The friction coefficient will not decrease due to the increase in working temperature. However, after ordinary metal brake discs generate heat due to friction, the friction coefficient will change with the change of temperature. This advantage is reflected when driving on steep slopes or when frequent braking is required. Ordinary brake discs are prone to soften and heat up, while carbon ceramic brake discs have more stable braking performance. "Silicon carbide (SiC) ceramic hard material with excellent antioxidant properties is used as a brake material based on the matrix. It not only maintains the advantages of low density and high temperature resistance of carbon / carbon composite brake materials, but also overcomes the shortcomings of carbon / carbon brake materials such as low static friction coefficient, large wet attenuation, insufficient friction life and poor environmental adaptability. It has become a new generation of brake materials and has broad application prospects in the braking field of modern transportation vehicles such as automobiles and high-speed trains.

[0005] However, due to the extremely high speed and the large mass of the electric vehicle itself, ordinary braking systems are indeed unable to cope with the task under extreme conditions. Therefore, in the future, many car manufacturers plan to replace electric vehicles with carbon ceramic brake discs, and all four wheels will use carbon ceramic discs to achieve the strongest braking effect.

[0006] However, at present, due to the very high hardness of carbon ceramic brake discs, and when using a double-end face grinder to grind the end face, the carbon ceramic brake disc will generate very high temperatures during the double-end face grinding process, and the advantage of carbon ceramic brake discs is that the higher the temperature, the higher the friction coefficient. Therefore, the processing difficulty is very large. When grinding carbon ceramic brake discs, the existing double-end face grinders generally have a processing time of more than 3 hours for each component, and a worker can only process 2 workpieces per shift, resulting in the overall high price of carbon ceramic brake discs. Please see the online disclosure of November 2021, Tesla announced that it will provide carbon ceramic brake kits for its fastest mass-produced car Model S Plaid in mid-2022. The cost of the kit has reached US$20,000, or about RMB 127,800. It can be seen that although the future market prospects of carbon ceramic brake discs are broad, due to the particularly high processing costs, many automakers cannot accept it.

[0007] It can be seen that carbon ceramic brake discs have a long processing time, great grinding difficulty, and high overall cost. Domestic and foreign industries are studying this problem. So far, there is no method or equipment to solve this problem. Summary of the invention

[0008] In order to solve the substantial deficiencies of the above-mentioned prior art, the present invention provides a disc-type workpiece positioning device and a grinder without fixed clamping, which have novel structure, fast processing speed, high processing efficiency, low processing cost and high processing quality.

[0009] The technical means adopted by the present invention to solve the above technical problems are: A disk-type workpiece positioning device without fixed clamping, characterized in that it is provided with a thumbwheel (3-3), a rotation drive device (3-2) and a support shaft (3-5), the support shaft is driven by the rotation drive device (3-2), the thumbwheel is provided on the support shaft, the outer circumference of the thumbwheel (3-3) is provided with a limiting portion that cooperates with the workpiece and limits the circumferential rotation of the workpiece, so as to limit the circumferential rotation of the workpiece (6) relative to the thumbwheel (3-3), and there is no fixed clamping in the axial direction, the thickness of the thumbwheel (3-3) is smaller than the thickness of the workpiece, so as to facilitate It is convenient to perform double-end surface processing on workpieces (6) with high hardness, such as carbon ceramic brake discs, and avoid the double-end surface grinding mechanism (2) touching the dial wheel (3-3). When the two end surfaces of the carbon ceramic brake disc workpiece with high hardness enter the double-end surface grinding device for grinding, the two grinding end surfaces of (6) can be axially moved and floated for adjustment along with the parallelism, thickness and flatness of the double end surfaces of the double end surface grinding device, thereby achieving the processing requirements of thickness, parallelism, flatness and roughness of the two end surfaces of the workpiece with high hardness during the grinding process.

[0010] The rotary drive device (3-2) of the present invention may be composed of a rotary drive motor (3-2-1) and a transmission device (3-2-2), wherein the rotary drive motor (3-2-1) is fixed on a seat plate (3-1), and an output shaft of the rotary drive motor (3-2-1) is connected to a support shaft (3-5) via the transmission device (3-2-2).

[0011] The transmission device (3-2-2) of the present invention can be a transmission box (3-4) composed of a gear and a driving gear, wherein the driving gear is fixed on the output shaft of the rotating driving motor, the driving gear meshes with the gear to transmit power, the gear is fixed on the support shaft, and the support shaft is rotatably connected to the transmission box. The present invention may also have an intermediate gear meshing between the driving gear and the gear, and the intermediate gear is rotatably connected to the transmission box (3-4) via an intermediate shaft.

[0012] The extension length of the front end of the transmission box (3-4) from the axis of the support shaft (3-5) forward (towards the double-end surface grinding device) is smaller than the radius of the thumbwheel (3-3), so as to prevent the grinding wheel from grinding the transmission box.

[0013] The limiting portion of the present invention is formed by connecting the outer circumference of the thumbwheel (3-3) with projections and / or grooves that cooperate with the inner hole of the workpiece (6) and limit the circumferential rotation of the workpiece (6) at intervals, and the projections and / or grooves are plugged into the grooves and / or projections provided on the inner ring of the brake disc; or brake disc positioning pins may be provided at intervals on the circumference of the outer surface of the thumbwheel, and the brake disc positioning pins are used to drive the brake disc to rotate.

[0014] The present invention can also be obtained by the following measures: As attached Figure 2As shown, a disk-type workpiece positioning device without fixed clamping is characterized in that it is provided with a thumbwheel (3-3), a workpiece mounting gear (3-6), a gear box (3-7), a driving gear (3-8) and a rotation driving device (3-2), the inner circumference of the thumbwheel (3-3) is provided with a limiting portion that cooperates with the outer ring of the workpiece (6) and limits the circumferential rotation of the workpiece, so as to limit the circumferential rotation of the workpiece relative to the thumbwheel (3-3), the outer circumference of the thumbwheel (3-3) is fixedly connected to the inner ring of the workpiece mounting gear (3-6), and the workpiece The outer periphery of the mounting gear (3-6) cooperates with a circular light hole (3-14) provided on the gear box (3-7) for axial positioning and is rotatably connected in the circumferential direction, so as to facilitate centering of the workpiece mounting gear (3-6) through the circular light hole (3-14); one side of the workpiece mounting gear (3-6) is meshed with a driving gear (3-8); the driving gear (3-8) is rotatably connected to the gear box (3-7) via a gear shaft; the driving gear (3-8) is driven by a rotary drive device (3-2); and the workpiece mounting gear (3-6) is engaged with a driving gear (3-8) via a gear shaft. There is a gap between the two ends of the wheel (3-6) and the left and right sealing plates of the gear box to prevent the workpiece mounting gear (3-6) from being separated from the gear box (3-7). The thickness of the gear box (3-7) is smaller than the thickness of the workpiece, so as to facilitate the double-end surface processing of ultra-thin workpieces with high hardness such as carbon ceramic brake discs, and to prevent the double-end surface grinding mechanism (2) from touching the dial wheel (3-3) and the gear box (3-7). When the two end surfaces of the carbon ceramic brake disc workpiece (6) with high hardness enter the double-end surface grinding device for grinding, the workpiece can be The two grinding end faces of the workpiece (6) are adjusted by axially coordinating floating movement with the parallelism, thickness and flatness of the double end faces of the double end face grinding device, thereby achieving the processing requirements of thickness, parallelism, flatness and roughness of the two end faces of the workpiece (6) with high hardness during the grinding process. At the same time, during the grinding process, the rotary drive device (3-2) drives the driving gear (3-8) to drive the workpiece mounting gear (3-6) to rotate, and the workpiece mounting gear (3-6) drives the workpiece on the thumbwheel to rotate, thereby significantly increasing the grinding speed of the workpiece.

[0015] The gear box (3-7) of the present invention is provided with a supporting rotation mechanism (3-10), the supporting rotation mechanism (3-10) is installed on the gear box (3-7), the supporting rotation mechanism (3-10) is connected to the workpiece mounting gear (3-6), and supports the workpiece mounting gear (3-6) to rotate stably.

[0016] The supporting rotation mechanism (3-10) of the present invention comprises a supporting gear (3-11) and a supporting gear shaft (3-12); the supporting gear (3-11) is provided on the outer periphery of the workpiece mounting gear (3-6); the supporting gear (3-11) meshes and rotates with the workpiece mounting gear (3-6); the supporting gear (3-11) is arranged in a supporting hole (3-13) of a gear box (3-7); the supporting hole (3-13) is connected to a circular light hole (3-14) where the workpiece mounting gear (3-6) is located; The support gear (3-11) is fixedly connected to the support gear shaft (3-12) via a bearing, and both ends of the support gear shaft (3-12) are fixedly connected to the gear box (3-7), or the support gear (3-11) is fixed on the support gear shaft (3-12), and both ends of the support gear shaft (3-12) are fixedly connected to the gear box (3-7) via bearings, so as to facilitate supporting and guiding the workpiece mounting gear to rotate through the support gear, ensure that the axis center position of the workpiece mounting gear is not offset, and the workpiece mounting gear rotates stably and smoothly.

[0017] The supporting gear (3-11) of the present invention is arranged at the lower end of the workpiece mounting gear (3-6) so as to support the workpiece mounting gear through the supporting gear and prevent the workpiece mounting gear from moving downward.

[0018] The supporting gears (3-11) of the present invention are circumferentially distributed on the outer circumference of the workpiece mounting gear (3-6), so as to better guide and support the workpiece mounting gear through the multiple supporting gears.

[0019] The present invention can provide an intermediate gear (3-9) between the workpiece mounting gear (3-6) and the driving gear (3-8), wherein the intermediate gear (3-9) is meshed with the workpiece mounting gear (3-6) and the driving gear (3-8) respectively, and the outer periphery of the intermediate gear (3-9) is rotatably connected to the second circular light hole on the gear box (3-7) in the circumferential direction, so as to facilitate the workpiece mounting gear to rotate through the driving gear via the intermediate gear (3-9), thereby enabling the workpiece mounting gear to drive the workpiece in the thumbwheel to rotate. By providing the intermediate gear, the grinding depth of the workpiece is further extended, and there is a gap between the two ends of the intermediate gear (3-9) and the left and right sealing plates on both sides of the gear box, so as to prevent the intermediate gear (3-9) from being separated from the second circular light hole on the gear box (3-7).

[0020] The material of the workpiece mounting gear (3-6) and / or the intermediate gear (3-9) of the present invention can be made of engineering plastics with high wear resistance, so as to achieve the effects of high wear resistance, light weight and long service life.

[0021] The intermediate gear (3-9) of the present invention is a hollow gear, so as to further reduce the weight and facilitate rapid power transmission.

[0022] The limiting portion of the present invention may be inner protrusions and / or inner grooves provided at intervals on the circumference of the inner ring of the thumbwheel (3-3) and cooperating with the outer ring of the workpiece (6) and limiting the circumferential rotation of the workpiece (6), and the inner protrusions and / or inner grooves are plugged into the grooves and / or protrusions provided on the outer ring of the brake disc; or brake disc positioning pins may be provided at intervals on the circumference of the inner ring surface of the thumbwheel, and the brake disc positioning pins are used to drive the brake disc to rotate.

[0023] A grinding machine comprises a bed (1), a double-end surface grinding mechanism (2) and a control system, wherein the double-end surface grinding mechanism (2) is controlled by the control system and is characterized in that it is also provided with a disc-type workpiece positioning device (3) without fixed clamping and a linear guide reciprocating drive device (4) as described above, wherein one of the disc-type workpiece positioning device (3) and the double-end surface grinding mechanism (2) is fixedly connected to the linear guide reciprocating drive device (4) fixed to the bed (1), and the other is fixedly connected to the bed (1), and the disc-type workpiece positioning device (3) and the double-end surface grinding mechanism (2) are driven by the linear guide reciprocating drive device (4) to move relative to each other, so as to achieve the effect of linear reciprocating grinding of the workpiece on the disc-type workpiece positioning device (3).

[0024] The present invention can provide a rolling introduction device 5 on one side surface of the feeding end of the double-end surface grinding mechanism (2). When the disc-type workpiece positioning device (3) drives the workpiece to enter the double-end surface grinding mechanism (2) for grinding, the rolling introduction device 5 and the workpiece are matched with each other in a clearance, so that the rolling introduction device 5 can guide the workpiece when it enters the grinding area of ​​the double-end surface grinding mechanism (2) for grinding. At the same time, when the workpiece gradually enters the grinding area, the double-end surface grinding mechanism (2) automatically adjusts the axial position of the workpiece, so that the workpiece automatically adjusts the parallelism and flatness of the workpiece processing surface and the grinding surface in a suspended state along with the grinding surfaces of the left grinding wheel (2-1) and the right grinding wheel (2-2) of the double-end surface grinding mechanism (2). At the same time, the rolling introduction device 5 limits the axial movement distance of the workpiece to prevent the workpiece from being separated from the support shaft (3-5) during the grinding process, thereby achieving safe grinding without fixed clamping.

[0025] The rolling introduction device 5 of the present invention is composed of a rolling fixed frame (5-1), a roller shaft (5-2), and a guide roller (5-3). The rolling fixed frame (5-1) is fixed on the side of the feed end. The free end of the rolling fixed frame (5-1) is rotatably provided with a roller shaft (5-2). The guide roller (5-3) is fixed on the roller shaft (5-2). The side tangent of the guide roller (5-3) and the grinding surface of the left grinding wheel (2-1) or the right grinding wheel (2-2) are on the same plane. When the workpiece enters the grinding area, the axial displacement of the workpiece is limited by the guide roller (5-3) to prevent the part of the workpiece that has not entered the grinding area from moving to one side and separating from the support shaft (3-5). At the same time, the workpiece can be rotationally guided as the workpiece rotates to ensure axial suspension grinding of the workpiece.

[0026] The present invention provides two rolling introduction devices 5, which are arranged vertically along the side of the feed end and are mirror-imaged relative to the support shaft (3-5) to ensure smooth movement of the workpiece when entering the grinding space.

[0027] The linear guide reciprocating drive device (4) of the present invention is composed of a linear guide (4-1), a reciprocating slide (4-2), a linear servo motor, a lead screw and a nut. The lower ends of two parallel linear guides (4-1) are fixed on a bed (1). A lead screw is provided between the linear guides (4-1). The lead screw is connected to a bearing seat fixed on the bed (1) via a bearing. One end of the lead screw is driven by the linear servo motor. A nut is threadedly connected to the lead screw. The upper end of the nut is fixedly connected to the reciprocating slide (4-2). The reciprocating slide (4-2) is slidably connected to the linear guide (4-1). The linear servo motor is connected to a support shaft (3-5) via an output shaft. The linear servo motor is controlled by a control system. The lower end of the disc workpiece positioning device (3) is fixedly connected to the reciprocating slide (4-2), or the lower end of the double-end surface grinding mechanism (2) is fixedly connected to the reciprocating slide (4-2).

[0028] The double-end surface grinding mechanism (2) of the present invention comprises a left grinding wheel (2-1), a right grinding wheel (2-2), a left grinding wheel rotation driving device (2-3), a right grinding wheel rotation driving device (2-4), a left moving driving device (2-5) and a right moving driving device (2-6); the left grinding wheel (2-1) and the right grinding wheel (2-2) are arranged in a mirror image; the left grinding wheel (2-1) is driven by the left grinding wheel rotation driving device (2-3); the lateral movement of the left grinding wheel (2-1) is driven by the left moving driving device (2-5) installed at the lower end of the left grinding wheel rotation driving device (2-3); The right grinding wheel (2-2) is driven by a right grinding wheel rotation drive device (2-4); the lateral movement of the right grinding wheel (2-2) is driven by a right movable drive device (2-6) installed at the lower end of the right grinding wheel rotation drive device (2-4); the left movable drive device (2-5) and the right movable drive device (2-6) are installed on a bed (1) or on a reciprocating slide (4-2); and the left grinding wheel rotation drive device (2-3), the right grinding wheel rotation drive device (2-4), the left movable drive device (2-5) and the right movable drive device (2-6) are respectively controlled by a control system.

[0029] The left grinding wheel rotation driving device (2-3) and the right grinding wheel rotation driving device (2-4) of the present invention are respectively composed of a grinding wheel rotation servo motor, a rotation support shaft support sleeve, and a rotation support shaft. The rotation support shaft in the left grinding wheel rotation driving device (2-3) passes through the rotation support shaft support sleeve through a support bearing and is fixedly connected to the left grinding wheel (2-1) at one end, and is fixedly connected to the output shaft of the grinding wheel rotation servo motor at the other end. The rotation support shaft in the right grinding wheel rotation driving device (2-4) passes through the rotation support shaft support sleeve through a support bearing and is fixedly connected to the right grinding wheel (2-2) at one end, and is fixedly connected to the output shaft of the grinding wheel rotation servo motor at the other end.

[0030] The end faces of the left grinding wheel (2-1) and the right grinding wheel (2-2) of the present invention are stepped, and the thickness of the inner ring (7) is greater than the thickness of the outer ring (8), so as to facilitate the processing of step-shaped disc-like workpieces and achieve the effect of rapid grinding.

[0031] The present invention has the advantages of novel structure, fast processing speed, high processing efficiency, low processing cost, high processing quality, etc. due to the adoption of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of embodiment 1 (inner dial) of the present invention.

[0033] Figure 2 It is a structural schematic diagram of embodiment 2 (external dial wheel) of the present invention.

[0034] Figure 3 It is a schematic structural diagram of a grinding machine embodiment of the present invention.

[0035] Figure 4 yes Figure 3 Schematic diagram of the structure of the left view.

[0036] Figure 5 yes Figure 3 A schematic diagram of the structure of a top view.

[0037] Figure 6 It is a schematic structural diagram of a stepped embodiment of the left and right grinding wheels of the present invention.

[0038] Figure 7 yes Figure 6 Top view of the .

[0039] Figure 8 This is a workpiece shape according to Example 1 of the present invention.

[0040] Fig. 9 This is another workpiece shape of Example 2 of the present invention.

[0041] Fig.10 It is another structural schematic diagram of embodiment 2 (external dial wheel) of the present invention.

[0042] Reference numerals: double-end surface grinding mechanism (2), left grinding wheel (2-1), right grinding wheel (2-2), left grinding wheel rotation drive device (2-3), right grinding wheel rotation drive device (2-4), left moving drive device (2-5), right moving drive device (2-6), disc workpiece positioning device (3), seat plate (3-1), rotation drive device (3-2), rotation drive motor (3-2-1), transmission device (3-2-2), thumbwheel (3-3), backing plate (3-4), support shaft (3-5) , workpiece mounting gear (3-6), gear box (3-7), drive gear (3-8), intermediate gear (3-9), support rotating mechanism (3-10), support gear (3-11), support gear shaft (3-12), support hole (3-13), circular light hole (3-14), linear guide reciprocating drive device (4), linear guide (4-1), reciprocating slide plate (4-2), rolling introduction device 5, rolling fixed frame (5-1), roller shaft (5-2), guide roller (5-3), workpiece 6. DETAILED DESCRIPTION

[0043] The present invention is described below in conjunction with the accompanying drawings and embodiments.

[0044] As attached Figure 1As shown, a disk-type workpiece positioning device without fixed clamping is characterized in that it is provided with a thumbwheel (3-3), a rotation driving device (3-2) and a support shaft (3-5), the support shaft is driven by the rotation driving device (3-2), the thumbwheel is provided on the support shaft, and the outer circumference of the thumbwheel (3-3) is provided with a limiting portion that cooperates with the workpiece and limits the circumferential rotation of the workpiece to limit the circumferential rotation of the workpiece (6) relative to the thumbwheel (3-3), and there is no fixed clamping in the axial direction. The thickness of the thumbwheel (3-3) is smaller than the thickness of the workpiece, so as to facilitate In order to facilitate the double-end surface processing of a workpiece (6) with high hardness, such as a carbon ceramic brake disc, and to prevent the double-end surface grinding mechanism (2) from touching the dial wheel (3-3), when the two end surfaces of the carbon ceramic brake disc workpiece with high hardness enter the double-end surface grinding device for grinding, the two grinding end surfaces of (6) can be axially moved and floated for adjustment along with the parallelism, thickness and flatness of the double end surfaces of the double end surface grinding device, thereby achieving the processing requirements of thickness, parallelism, flatness and roughness of the two end surfaces of the workpiece with high hardness during the grinding process.

[0045] The rotary drive device (3-2) of the present invention may be composed of a rotary drive motor (3-2-1) and a transmission device (3-2-2); the rotary drive motor (3-2-1) is fixed on a transmission box (3-4) or a seat plate (3-1); and the output shaft of the rotary drive motor (3-2-1) is connected to a support shaft (3-5) via the transmission device (3-2-2).

[0046] The transmission device (3-2-2) of the present invention can be a transmission box (3-4) composed of a gear and a driving gear, wherein the driving gear is fixed on the output shaft of the rotating driving motor, the driving gear meshes with the gear to transmit power, the gear is fixed on the support shaft, and the support shaft is rotatably connected to the transmission box. The present invention may also have an intermediate gear meshing between the driving gear and the gear, and the intermediate gear is rotatably connected to the transmission box (3-4) via an intermediate shaft.

[0047] The present invention may also be a transmission box (3-4) composed of two bevel gears, a transmission box (3-4) composed of a synchronous belt and a pulley, or a transmission box (3-4) composed of a chain and a sprocket. The above connections belong to the prior art and will not be described in detail.

[0048] The extension length of the front end of the transmission box (3-4) from the axis of the support shaft (3-5) forward (towards the direction of the double-end surface grinding device) is smaller than the radius of the thumbwheel (3-3), so as to prevent the grinding wheel from grinding the transmission box.

[0049] The limiting portion of the present invention is formed by connecting the outer circumference of the thumbwheel (3-3) with projections and / or grooves that cooperate with the inner hole of the workpiece (6) and limit the circumferential rotation of the workpiece (6) at intervals, and the projections and / or grooves are plugged into the grooves and / or projections provided on the inner ring of the brake disc; or brake disc positioning pins may be provided at intervals on the circumference of the outer surface of the thumbwheel, and the brake disc positioning pins are used to drive the brake disc to rotate.

[0050] The present invention can also be obtained by the following measures: As attached Figure 2 As shown, a disk-type workpiece positioning device without fixed clamping is characterized in that it is provided with a thumbwheel (3-3), a workpiece mounting gear (3-6), a gear box (3-7), a driving gear (3-8) and a rotation driving device (3-2), the inner circumference of the thumbwheel (3-3) is provided with a limiting portion that cooperates with the outer ring of the workpiece (6) and limits the circumferential rotation of the workpiece, so as to limit the circumferential rotation of the workpiece relative to the thumbwheel (3-3), the outer circumference of the thumbwheel (3-3) is fixedly connected to the inner ring of the workpiece mounting gear (3-6), and the workpiece The outer periphery of the mounting gear (3-6) cooperates with a circular light hole (3-14) provided on the gear box (3-7) for axial positioning and is rotatably connected in the circumferential direction, so as to facilitate centering of the workpiece mounting gear (3-6) through the circular light hole (3-14); one side of the workpiece mounting gear (3-6) is meshed with a driving gear (3-8); the driving gear (3-8) is rotatably connected to the gear box (3-7) via a gear shaft; the driving gear (3-8) is driven by a rotary drive device (3-2); and the workpiece mounting gear (3-6) is engaged with a driving gear (3-8) via a gear shaft. There is a gap between the two ends of the wheel (3-6) and the left and right sealing plates of the gear box to prevent the workpiece mounting gear (3-6) from being separated from the gear box (3-7). The thickness of the gear box (3-7) is smaller than the thickness of the workpiece, so as to facilitate the double-end surface processing of ultra-thin workpieces with high hardness such as carbon ceramic brake discs, and to prevent the double-end surface grinding mechanism (2) from touching the dial wheel (3-3) and the gear box (3-7). When the two end surfaces of the carbon ceramic brake disc workpiece (6) with high hardness enter the double-end surface grinding device for grinding, the workpiece can be The two grinding end faces of the workpiece (6) are adjusted by axially coordinating floating movement with the parallelism, thickness and flatness of the double end faces of the double end face grinding device, thereby achieving the processing requirements of thickness, parallelism, flatness and roughness of the two end faces of the workpiece (6) with high hardness during the grinding process. At the same time, during the grinding process, the rotary drive device (3-2) drives the driving gear (3-8) to drive the workpiece mounting gear (3-6) to rotate, and the workpiece mounting gear (3-6) drives the workpiece on the thumbwheel to rotate, thereby significantly increasing the grinding speed of the workpiece.

[0051] As attached Fig.10As shown, the gear box (3-7) of the present invention is provided with a supporting rotation mechanism (3-10), the supporting rotation mechanism (3-10) is installed on the gear box (3-7), the supporting rotation mechanism (3-10) is connected to the workpiece mounting gear (3-6), and the supporting workpiece mounting gear (3-6) rotates stably.

[0052] The supporting rotation mechanism (3-10) of the present invention comprises a supporting gear (3-11) and a supporting gear shaft (3-12); the supporting gear (3-11) is provided on the outer periphery of the workpiece mounting gear (3-6); the supporting gear (3-11) meshes and rotates with the workpiece mounting gear (3-6); the supporting gear (3-11) is arranged in a supporting hole (3-13) of a gear box (3-7); the supporting hole (3-13) is connected to a circular light hole (3-14) where the workpiece mounting gear (3-6) is located; The support gear (3-11) is fixedly connected to the support gear shaft (3-12) via a bearing, and both ends of the support gear shaft (3-12) are fixedly connected to the gear box (3-7), or the support gear (3-11) is fixed on the support gear shaft (3-12), and both ends of the support gear shaft (3-12) are fixedly connected to the gear box (3-7) via bearings, so as to facilitate supporting and guiding the workpiece mounting gear to rotate through the support gear, ensure that the axis center position of the workpiece mounting gear is not offset, and the workpiece mounting gear rotates stably and smoothly.

[0053] The supporting gear (3-11) of the present invention is arranged at the lower end of the workpiece mounting gear (3-6) so as to support the workpiece mounting gear through the supporting gear and prevent the workpiece mounting gear from moving downward.

[0054] The supporting gears (3-11) of the present invention are circumferentially distributed on the outer circumference of the workpiece mounting gear (3-6), so as to better guide and support the workpiece mounting gear through the multiple supporting gears.

[0055] The present invention can provide an intermediate gear (3-9) between the workpiece mounting gear (3-6) and the driving gear (3-8), wherein the intermediate gear (3-9) is meshed with the workpiece mounting gear (3-6) and the driving gear (3-8) respectively, and the outer periphery of the intermediate gear (3-9) is rotatably connected to the second circular light hole on the gear box (3-7) in the circumferential direction, so as to facilitate the workpiece mounting gear to rotate through the driving gear via the intermediate gear (3-9), thereby enabling the workpiece mounting gear to drive the workpiece in the thumbwheel to rotate. By providing the intermediate gear, the grinding depth of the workpiece is further extended, and there is a gap between the two ends of the intermediate gear (3-9) and the left and right sealing plates on both sides of the gear box, so as to prevent the intermediate gear (3-9) from being separated from the second circular light hole on the gear box (3-7).

[0056] The material of the workpiece mounting gear (3-6) and / or the intermediate gear (3-9) of the present invention can be made of engineering plastics with high wear resistance, so as to achieve the effects of high wear resistance, light weight and long service life.

[0057] The intermediate gear (3-9) of the present invention is a hollow gear, so as to further reduce the weight and facilitate rapid power transmission.

[0058] The limiting portion of the present invention may be inner protrusions and / or inner grooves provided at intervals on the circumference of the inner ring of the thumbwheel (3-3) and cooperating with the outer ring of the workpiece (6) and limiting the circumferential rotation of the workpiece (6), and the inner protrusions and / or inner grooves are plugged into the grooves and / or protrusions provided on the outer ring of the brake disc; or brake disc positioning pins may be provided at intervals on the circumference of the inner ring surface of the thumbwheel, and the brake disc positioning pins are used to drive the brake disc to rotate.

[0059] The rotary drive device (3-2) of the present invention uses a rotary drive motor (3-2-1), and may also use other power sources.

[0060] As attached Figure 3 , 4 As shown in , 5, a grinding machine comprises a bed (1), a double-end surface grinding mechanism (2) and a control system, wherein the double-end surface grinding mechanism (2) is controlled by the control system and is characterized in that it is also provided with a disc-type workpiece positioning device (3) without fixed clamping and a linear guide reciprocating drive device (4) as described above, wherein one of the disc-type workpiece positioning device (3) and the double-end surface grinding mechanism (2) is fixedly connected to the linear guide reciprocating drive device (4) fixed on the bed (1), and the other is fixedly connected to the bed (1), and the disc-type workpiece positioning device (3) and the double-end surface grinding mechanism (2) are driven by the linear guide reciprocating drive device (4) to move relative to each other, so as to achieve the effect of linear reciprocating grinding of the workpiece on the disc-type workpiece positioning device (3).

[0061] The present invention can provide a rolling introduction device 5 on one side surface of the feeding end of the double-end surface grinding mechanism (2). When the disc-type workpiece positioning device (3) drives the workpiece to enter the double-end surface grinding mechanism (2) for grinding, the rolling introduction device 5 and the workpiece are matched with each other in a clearance, so that the rolling introduction device 5 can guide the workpiece when it enters the grinding area of ​​the double-end surface grinding mechanism (2) for grinding. At the same time, when the workpiece gradually enters the grinding area, the double-end surface grinding mechanism (2) automatically adjusts the axial position of the workpiece, so that the workpiece automatically adjusts the parallelism and flatness of the workpiece processing surface and the grinding surface in a suspended state along with the grinding surfaces of the left grinding wheel (2-1) and the right grinding wheel (2-2) of the double-end surface grinding mechanism (2). At the same time, the rolling introduction device 5 limits the axial movement distance of the workpiece to prevent the workpiece from being separated from the support shaft (3-5) during the grinding process, thereby achieving safe grinding without fixed clamping.

[0062] The rolling introduction device 5 of the present invention is composed of a rolling fixed frame (5-1), a roller shaft (5-2), and a guide roller (5-3). The rolling fixed frame (5-1) is fixed on the side of the feed end. The free end of the rolling fixed frame (5-1) is rotatably provided with a roller shaft (5-2). The guide roller (5-3) is fixed on the roller shaft (5-2). The side tangent of the guide roller (5-3) and the grinding surface of the left grinding wheel (2-1) or the right grinding wheel (2-2) are on the same plane. When the workpiece enters the grinding area, the axial displacement of the workpiece is limited by the guide roller (5-3) to prevent the part of the workpiece that has not entered the grinding area from moving to one side and separating from the support shaft (3-5). At the same time, the workpiece can be rotationally guided as the workpiece rotates to ensure axial suspension grinding of the workpiece.

[0063] The present invention provides two rolling introduction devices 5, which are arranged vertically along the side of the feed end and are mirror-imaged relative to the support shaft (3-5) to ensure smooth movement of the workpiece when entering the grinding space.

[0064] The linear guide reciprocating drive device (4) of the present invention is composed of a linear guide (4-1), a reciprocating slide (4-2), a linear servo motor, a lead screw and a nut. The lower ends of two parallel linear guides (4-1) are fixed on a bed (1). A lead screw is provided between the linear guides (4-1). The lead screw is connected to a bearing seat fixed on the bed (1) via a bearing. One end of the lead screw is driven by the linear servo motor. A nut is threadedly connected to the lead screw. The upper end of the nut is fixedly connected to the reciprocating slide (4-2). The reciprocating slide (4-2) is slidably connected to the linear guide (4-1). The linear servo motor is connected to a support shaft (3-5) via an output shaft. The linear servo motor is controlled by a control system. The lower end of the disc workpiece positioning device (3) is fixedly connected to the reciprocating slide (4-2), or the lower end of the double-end surface grinding mechanism (2) is fixedly connected to the reciprocating slide (4-2).

[0065] The double-end surface grinding mechanism (2) of the present invention comprises a left grinding wheel (2-1), a right grinding wheel (2-2), a left grinding wheel rotation driving device (2-3), a right grinding wheel rotation driving device (2-4), a left moving driving device (2-5) and a right moving driving device (2-6); the left grinding wheel (2-1) and the right grinding wheel (2-2) are arranged in a mirror image; the left grinding wheel (2-1) is driven by the left grinding wheel rotation driving device (2-3); the lateral movement of the left grinding wheel (2-1) is driven by the left moving driving device (2-5) installed at the lower end of the left grinding wheel rotation driving device (2-3); The right grinding wheel (2-2) is driven by a right grinding wheel rotation drive device (2-4); the lateral movement of the right grinding wheel (2-2) is driven by a right movable drive device (2-6) installed at the lower end of the right grinding wheel rotation drive device (2-4); the left movable drive device (2-5) and the right movable drive device (2-6) are installed on a bed (1) or on a reciprocating slide (4-2); and the left grinding wheel rotation drive device (2-3), the right grinding wheel rotation drive device (2-4), the left movable drive device (2-5) and the right movable drive device (2-6) are respectively controlled by a control system.

[0066] The left grinding wheel rotation driving device (2-3) and the right grinding wheel rotation driving device (2-4) of the present invention are respectively composed of a grinding wheel rotation servo motor, a rotation support shaft support sleeve, and a rotation support shaft. The rotation support shaft in the left grinding wheel rotation driving device (2-3) passes through the rotation support shaft support sleeve through a support bearing and is fixedly connected to the left grinding wheel (2-1) at one end, and is fixedly connected to the output shaft of the grinding wheel rotation servo motor at the other end. The rotation support shaft in the right grinding wheel rotation driving device (2-4) passes through the rotation support shaft support sleeve through a support bearing and is fixedly connected to the right grinding wheel (2-2) at one end, and is fixedly connected to the output shaft of the grinding wheel rotation servo motor at the other end.

[0067] The structures of the left moving drive device (2-5) and the right moving drive device (2-6) described in the present invention are the same as those of the linear guide reciprocating drive device (4), and are not described in detail here.

[0068] As attached Figure 6 , 7 As shown, the end faces of the left grinding wheel (2-1) and the right grinding wheel (2-2) of the present invention are stepped, and the thickness of the inner ring (7) is greater than the thickness of the outer ring (8), so as to facilitate the processing of step-shaped disc-like workpieces and achieve the effect of rapid grinding.

[0069] Embodiment 1 of the present invention is as follows: the upper end of a linear guide reciprocating drive device (4) is fixedly connected to a disc-type workpiece positioning device (3), and a double-end surface grinding mechanism (2) is fixed on a bed (1).

[0070] During installation, the thumbwheel (3-3) is first fixed to the support shaft (3-5) by a locking component. The locking component of the present invention can be a locking screw or other locking parts with the same function. When installing a high-hardness workpiece (6) of the first workpiece shape (such as the attached Figure 8 ), after the groove and / or protrusion at one end of the inner circle of the grinding workpiece is matched and inserted with the protrusion and / or groove on the outer circle of the thumbwheel (3-3), the small-diameter inner hole at the other end of the workpiece is brought into contact with the side end face of the thumbwheel, and a high-hardness brake disc workpiece (6) such as carbon ceramic is hung on the thumbwheel (3-3). The protrusion and / or groove provided on the thumbwheel (3-3) matches the groove and / or protrusion on the workpiece, so that the workpiece and the thumbwheel (3-3) are fixed in the circumferential direction and movably inserted in the axial direction; Or, when grinding the inner ring of the second workpiece shape as a light hole (such as the attached Fig. 9 ), the inner ring of the workpiece is matched and plugged with the thumbwheel (3-3), and the brake disc is restricted on the thumbwheel by a positioning pin passing through a through hole on the surface of the brake disc and a positioning plug hole of the brake disc, so that the workpiece and the thumbwheel (3-3) are fixed in the circumferential direction and movably plugged in the axial direction; During grinding, the control system instructs the linear servo motor to move, driving the reciprocating slide plate (4-2) to move. The reciprocating slide plate (4-2) drives the workpiece on the disc-type workpiece positioning device (3) to enter the grinding area through the guidance of the upper and lower guide rollers (5-3). When the workpiece enters the grinding area, due to the axial movable insertion of the workpiece without fixed clamping, when the workpiece enters the grinding area, the end face of the workpiece is automatically adjusted to the grinding surface through the constraints of the end face of the left grinding wheel (2-1) and the end face of the right grinding wheel (2-2) of the double-end grinding mechanism (2). The parallelism and flatness with the left grinding wheel (2-1) and the right grinding wheel (2-2) are ensured. During the adjustment and grinding process, since the workpiece does not completely enter the grinding zone, the part of the workpiece that is leaked outside the grinding zone is constrained by the upper and lower guide rollers (5-3) to limit the axial suspension adjustment amount of the workpiece, thereby ensuring the grinding thickness, parallelism and flatness of the workpiece during safe grinding. In order to speed up the grinding speed, when entering the grinding zone, the control system instructs the rotation drive motor (3-2-1) to operate, and the rotation drive motor The machine (3-2-1) drives the workpiece on the thumbwheel (3-3) to rotate. Since the thumbwheel (3-3) and the workpiece are plugged and positioned in the middle through the protrusion and / or groove, the thumbwheel (3-3) drives the workpiece to rotate while being driven by the linear guide reciprocating drive device (4) to gradually enter the double-end surface grinding mechanism (2). At this time, the rotation direction of the workpiece is the same as the rotation direction of the double-end surface grinding mechanism (2). As a result, while further increasing the grinding force, since the double-end surface grinding mechanism (2) performs a small amount of rapid grinding on the rotating and gradually moving or reciprocating workpiece, the temperature rise of high-hardness workpieces such as carbon ceramics is small during the grinding process, and the friction system of such workpieces will not be increased, thereby significantly improving the grinding efficiency and grinding quality. Since the present invention is used to process high-hardness workpieces such as carbon ceramics, the working time for each workpiece is only about 3 minutes, while the existing double-end surface grinding device needs 2 to 3 hours to process a workpiece. Obviously, the present invention has achieved unexpected technical effects.

[0071] Embodiment 2 of the present invention is as follows: the upper end of the linear guide reciprocating drive device (4) is fixedly connected to the disc-type workpiece positioning device (3), and the double-end surface grinding mechanism (2) is fixed on the bed (1).

[0072] When grinding a high-hardness workpiece whose outer ring is matched with the protrusions and / or grooves on the inner circle of the thumbwheel (3-3) for insertion, the thumbwheel (3-3) is first fixed to the inner circle of the workpiece mounting gear by a locking component. The locking component described in the present invention can be a locking screw or other locking parts with the same function. Then, a high-hardness brake disc workpiece such as a carbon ceramic is inserted into the inner circle of the thumbwheel (3-3). The protrusions and / or grooves provided on the inner circle of the thumbwheel (3-3) are matched with the grooves and / or protrusions on the outer surface of the workpiece, so that the workpiece and the thumbwheel (3-3) are fixed circumferentially and movably inserted axially.

[0073] During grinding, the control system instructs the linear servo motor to move, driving the reciprocating slide plate (4-2) to move. The reciprocating slide plate (4-2) drives the workpiece on the disc-type workpiece positioning device (3) to enter the grinding area through the guidance of the upper and lower guide rollers (5-3). When the workpiece enters the grinding area, due to the axial movable insertion of the workpiece without fixed clamping, when the workpiece enters the grinding area, the end face of the workpiece is automatically adjusted to the grinding surface through the constraints of the end face of the left grinding wheel (2-1) and the end face of the right grinding wheel (2-2) of the double-end grinding mechanism (2). The parallelism and flatness with the left grinding wheel (2-1) and the right grinding wheel (2-2) are ensured. During the adjustment and grinding process, since the workpiece does not need to completely enter the grinding zone, the part of the workpiece outside the grinding zone is constrained by the upper and lower guide rollers (5-3) to limit the axial suspension adjustment amount of the workpiece, thereby ensuring the grinding thickness, parallelism and flatness of the workpiece during safe grinding. In order to speed up the grinding speed, when entering the grinding zone, the control system instructs the rotary drive device (3-2) to operate, and the rotary drive device ( 3-2) drives the driving gear to rotate, and the driving gear drives the meshing workpiece mounting gear (3-6) to rotate. The workpiece mounting gear (3-6) rotates in the circular light hole (3-14) of the gear box (3-7), thereby driving the workpiece 6 whose inner ring is circumferentially limited by the thumbwheel (3-3) to rotate. Since the thumbwheel (3-3) and the workpiece are plugged and positioned in the middle through the protrusion and / or groove, the thumbwheel (3-3) drives the workpiece to rotate while being driven by the linear guide reciprocating drive device (4) to gradually enter the double-end surface grinding mechanism (2). At this time, the rotation direction of the workpiece is the same as the rotation direction of the double-end surface grinding mechanism (2). As a result, while further increasing the grinding force, since the double-end surface grinding mechanism (2) performs a small amount of rapid grinding on the rotating and gradually moving or reciprocating workpiece, the temperature rise of high-hardness workpieces such as carbon ceramics is small during the grinding process, and the friction system of such workpieces will not be increased, thereby significantly improving the grinding efficiency and grinding quality. Fig.10The present invention can be provided with a supporting rotation mechanism (3-10) on the gear box (3-7), that is, a supporting gear (3-11) is distributed on the outer circumference of the workpiece mounting gear (3-6), and the supporting gear (3-11) can guide the rotation of the workpiece mounting gear (3-6) and support the workpiece mounting gear (3-6), so that the workpiece mounting gear (3-6) can rotate smoothly while the axis of the workpiece mounting gear (3-6) will not deviate, thereby ensuring that the axis of the workpiece 6 does not move, ensuring the grinding accuracy and grinding efficiency of the workpiece. In addition, through the supporting gear (3-11), a certain gap can always be maintained between the workpiece mounting gear (3-6) and the circular light hole (3-14), so that The workpiece mounting gear (3-6) does not contact the inner wall of the circular light hole (3-14). At the same time, the rotation of the workpiece mounting gear (3-6) and the supporting gear (3-11) generates a centrifugal force on the debris ground by the workpiece mounting gear (3-6), driving the debris to fly out of the circular light hole (3-14), greatly reducing the amount of debris falling from the circular light hole (3-14), and ensuring that the workpiece mounting gear (3-6) rotates smoothly. Due to the use of the present invention to process high-hardness workpieces such as carbon ceramics, the working time for each workpiece is only about 3 minutes, while the existing double-end surface grinding device needs 2 to 3 hours to process a workpiece. Obviously, the present invention has achieved unexpected technical effects.

[0074] The present invention has the advantages of novel structure, fast processing speed, high processing efficiency, low processing cost, high processing quality, etc. due to the adoption of the above structure.

Claims

1. A disk-type workpiece positioning device without fixed clamping, characterized in that A thumbwheel (3-3), a rotation drive device (3-2) and a support shaft (3-5) are provided, the support shaft being driven by the rotation drive device, the thumbwheel being provided on the support shaft, the outer circumference of the thumbwheel (3-3) being provided with limiting parts which cooperate with a workpiece and limit the circumferential rotation of the workpiece, so as to limit the circumferential rotation of the workpiece (6) relative to the thumbwheel (3-3), and there is no axial fixed clamping, and the thickness of the thumbwheel (3-3) is less than the thickness of the workpiece.

2. A disk-type workpiece positioning device without fixed clamping according to claim 1, characterized in that The rotary drive device (3-2) is composed of a rotary drive motor (3-2-1) and a transmission device (3-2-2); the rotary drive motor (3-2-1) is fixed on a transmission box (3-4) or a seat plate (3-1); and the output shaft of the rotary drive motor (3-2-1) is connected to a support shaft (3-5) via the transmission device (3-2-2).

3. A disk-type workpiece positioning device without fixed clamping according to claim 2, characterized in that The transmission device (3-2-2) is a transmission box (3-4) composed of a gear and a driving gear, wherein the driving gear is fixed on the output shaft of the rotating driving motor, the driving gear meshes with the gear to transmit power, the gear is fixed on the support shaft, and the support shaft is rotatably connected to the transmission box.

4. A disk-type workpiece positioning device without fixed clamping according to claim 3, characterized in that An intermediate gear is meshed between the driving gear and the gear, and the intermediate gear is rotatably connected to the transmission box (3-4) via an intermediate shaft.

5. A disk-type workpiece positioning device without fixed clamping according to claim 3 or 4, characterized in that The extension length of the front end of the transmission box (3-4) from the axis of the support shaft (3-5) forward (towards the direction of the double-end surface grinding device) is less than the radius of the thumbwheel (3-3).

6. A disk-type workpiece positioning device without fixed clamping according to claim 5, characterized in that The limiting portion is formed by connecting protrusions and / or grooves at intervals on the outer circumference of the thumbwheel (3-3) and matching with the inner hole of the workpiece (6) and limiting the circumferential rotation of the workpiece (6) end to end, and the protrusions and / or grooves are matched and plugged with the grooves and / or protrusions provided on the inner ring of the brake disc; or brake disc positioning pins are provided at intervals on the outer surface of the thumbwheel, and the brake disc positioning pins are used to drive the brake disc to rotate.

7. A disk-type workpiece positioning device without fixed clamping, characterized in that A thumbwheel (3-3), a workpiece mounting gear (3-6), a gear box (3-7), a driving gear (3-8) and a rotation driving device (3-2) are provided. The inner circumference of the thumbwheel (3-3) is provided with a limiting portion which cooperates with the outer circumference of the workpiece (6) and limits the circumferential rotation of the workpiece, so as to limit the circumferential rotation of the workpiece relative to the thumbwheel (3-3). The outer circumference of the thumbwheel (3-3) is fixedly connected to the inner circumference of the workpiece mounting gear (3-6). The outer circumference of the workpiece mounting gear (3-6) is fixedly connected to the gear box (3-7). 7) is provided with a circular light hole (3-14) which cooperates with the radial positioning and is circumferentially rotatably connected, one side of the workpiece mounting gear (3-6) is meshed with the driving gear (3-8), the driving gear (3-8) is rotatably connected to the gear box (3-7) via a gear shaft, the driving gear (3-8) is driven by a rotary drive device (3-2), there is a gap between the two ends of the workpiece mounting gear (3-6) and the left and right sealing plates of the gear box, and the thickness of the gear box (3-7) is less than the thickness of the workpiece.

8. A disk-type workpiece positioning device without fixed clamping according to claim 7, characterized in that: The gear box (3-7) is provided with a supporting rotation mechanism (3-10), the supporting rotation mechanism (3-10) is mounted on the gear box (3-7), the supporting rotation mechanism (3-10) is connected to the workpiece mounting gear (3-6), and supports the workpiece mounting gear (3-6) to rotate stably.

9. A disk-type workpiece positioning device without fixed clamping according to claim 8, characterized in that: The supporting rotating mechanism (3-10) comprises a supporting gear (3-11) and a supporting gear shaft (3-12); a supporting gear (3-11) is provided on the outer periphery of the workpiece mounting gear (3-6); the supporting gear (3-11) meshes and rotates with the workpiece mounting gear (3-6); and the supporting gear (3-11) is mounted on a gear box (3-7) via the supporting gear shaft (3-12).

10. A disk-type workpiece positioning device without fixed clamping according to claim 9, characterized in that: The supporting gear (3-11) is arranged at the lower end of the workpiece mounting gear (3-6).

11. The disk-type workpiece positioning device without fixed clamping according to claim 9, characterized in that: The supporting gears (3-11) are circumferentially distributed on the outer circumference of the workpiece mounting gear (3-6).

12. A disk-type workpiece positioning device without fixed clamping according to any one of claims 7 to 11, characterized in that An intermediate gear (3-9) is provided between the workpiece mounting gear (3-6) and the driving gear (3-8), and the intermediate gear (3-9) is meshed with the workpiece mounting gear (3-6) and the driving gear (3-8) respectively. The outer periphery of the intermediate gear (3-9) is rotatably connected to the second circular light hole on the gear box (3-7), and there is a gap between the two ends of the intermediate gear (3-9) and the sealing plates on both sides of the gear box.

13. A disk-type workpiece positioning device without fixed clamping according to claim 12, characterized in that The workpiece mounting gear (3-6) and / or the intermediate gear (3-9) are made of engineering plastics with high wear resistance.

14. A disk-type workpiece positioning device without fixed clamping according to claim 12, characterized in that The intermediate gear (3-9) is a hollow gear, so as to further reduce the weight and facilitate rapid power transmission.

15. A disk-type workpiece positioning device without fixed clamping according to any one of claims 7 to 11, 13 and 14, characterized in that The limiting portion is formed by connecting the inner protrusions and / or inner grooves which are arranged at intervals on the circumference of the inner ring of the thumbwheel (3-3) and match the outer ring of the workpiece (6) and limit the circumferential rotation of the workpiece (6) end to end, and the inner protrusions and / or inner grooves are matched and plugged with the grooves and / or protrusions arranged on the outer ring of the brake disc; or the inner ring surface of the thumbwheel is arranged at intervals on the circumference of the inner ring, and the brake disc positioning holes are provided with positioning pins.

16. A grinding machine, comprising a bed (1), a double-end surface grinding mechanism (2) and a control system, wherein the double-end surface grinding mechanism (2) is controlled by the control system, and is characterized in that There is also a disc-type workpiece positioning device (3) without fixed clamping and a linear guide reciprocating drive device (4) as described in any one of claims 1 to 15, one of the disc-type workpiece positioning device (3) and the double-end surface grinding mechanism (2) is fixedly connected to the linear guide reciprocating drive device (4) fixed on the bed (1), and the other is fixedly connected to the bed (1).

17. A grinding machine according to claim 16, characterized in that A rolling introduction device (5) is provided on the side surface of the feeding end of the left grinding wheel (2-1) or the right grinding wheel (2-2) of the double-end surface grinding mechanism (2).

18. A grinding machine according to claim 17, characterized in that Two rolling introduction devices (5) are provided, and the two rolling introduction devices (5) are arranged vertically along the side of the feed end and are mirror-imaged with respect to the support shaft (3-5) respectively.

19. A grinding machine according to claim 17 or 18, characterized in that The rolling introduction device (5) is composed of a rolling fixed frame (5-1), a roller shaft (5-2), and a guide roller (5-3); the rolling fixed frame (5-1) is fixed to the side of the feed end; the free end of the rolling fixed frame (5-1) is movably provided with a roller shaft (5-2); the guide roller (5-3) is fixed on the roller shaft (5-2); and the side tangent of the guide roller (5-3) is on the same plane as the grinding surface of the left grinding wheel (2-1) or the right grinding wheel (2-2).

20. A grinding machine according to claim 17 or 18, characterized in that The left grinding wheel (2-1) and the right grinding wheel (2-2) are respectively stepped grinding wheels with inner ring thickness greater than outer ring thickness.

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