Hobbing cutter edging grinding machine

Abstract

The invention provides a hob edging grinding machine, and belongs to the technical field of grinding machines. The technical problem that an existing hob edging grinding machine is low in clamping precision is solved. The hob edging grinding machine comprises a workbench, a headstock, a tailstock and a hob body, a plurality of inclined rotary cutting edges are arranged on the periphery of the hob body at intervals, a fixing hole is formed in the hob body, a plurality of axially-through fixing grooves are formed in the inner wall of the fixing hole in a sunken mode, a fixing rotating shaft is rotationally fixed between the headstock and the tailstock, and a fastening assembly is fixedly connected to the fixing rotating shaft. A limiting block is fixedly arranged on the control box, a rotating seat is fixedly connected to the rotating shaft, a grinding wheel is arranged on the rotating seat, the rotating seat is provided with a limiting groove, the grinding wheel rotates until the limiting groove abuts against the limiting block, and the grinding wheel is matched with the inclined angle of the inclined rotary cutting edge. By adjusting the grinding angle and stabilizing the hob body, the angle matching between the grinding wheel and the blade is ensured, the slippage of the hob body is prevented, and the grinding precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding machines, in particular to a hob cutting grinding machine. Background Art

[0002] Hob cutting edge grinding machine is a kind of high-precision machine tool equipment specially used for processing and grinding hob cutting edges, and is mainly used in the field of gear processing.

[0003] Existing patent number 2023103359852 is a hob blade grinder, which includes an operating table, a reciprocating device and a grinding device. The reciprocating device includes a support plate, a power mechanism, a drive seat and a tailstock. The support plate is slidably connected to the operating table, the power mechanism is connected to the operating table, the power mechanism is connected to the support plate to drive the support plate to slide back and forth, the drive seat is fixedly connected to the support plate, a clamping rod is rotatably connected to the drive seat, a reduction motor is installed on the drive seat, the reduction motor is in transmission connection with the clamping rod, the tailstock is fixedly connected to the support plate, and the clamping rod and the tailstock of the machine tool jointly clamp the hob; the grinding device is connected to the operating table, and the grinding device is used to grind the hob. However, the clearance between the hob fixing hole and the rotating shaft in this grinder can easily cause radial runout, resulting in reduced hob accuracy, and hob accuracy directly affects gear accuracy. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a hob cutting grinding machine. The technical problem to be solved by the present invention is how to better fix the hob body so that the grinding wheel and the hob body can be better ground and the grinding accuracy can be improved.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a hob blade grinding machine comprises a worktable, an X-axis moving pair is provided on the worktable, a Z-axis moving pair is provided on the X-axis moving pair, a control box is provided on the Z-axis moving pair, a rotating shaft is provided in the control box, and a grinding wheel is rotatably connected to the rotating shaft. The hob blade grinding machine also includes a headstock, a tailstock and a hob body, wherein a plurality of inclined rotary cutting blades are arranged at intervals on the periphery of the hob body, and a fixing hole is provided inside the hob body, and a plurality of axially penetrating fixing grooves are recessed in the inner wall of the fixing hole. A fixed rotating shaft is rotatably fixed between the headstock and the tailstock, and a fastening component is fixedly connected to the fixed rotating shaft, and the fastening component fixes the hob body through the fixing hole, a limiting block is fixedly provided on the control box, a rotating seat is fixedly connected to the rotating shaft, and a grinding wheel is provided on the rotating seat, and the rotating seat has a limiting groove. The grinding wheel rotates until the limiting groove abuts against the limiting block, and the inclination angle of the grinding wheel matches the inclined rotary cutting blade. By adjusting the grinding angle and stabilizing the hob body, the angle of the grinding wheel and the blade is ensured to match, the hob body is prevented from slipping, and the grinding accuracy is improved.

[0006] Furthermore, the fixed shaft includes a conical fastening portion, and the fastening assembly includes a fastening seat having a plurality of mounting slots therein, with guide blocks disposed between adjacent mounting slots. The mounting slots are provided with guide slots communicating with the fixing slots, and a fastener is disposed within the mounting slot. The fastener has an inclined surface (1) that engages and abuts against the conical fastening portion, and a rubber bump is fixedly attached to one end of the fastener distal from the inclined surface (1). The rubber bump passes through the guide slot and is secured to the fixing slot. This solution allows for quick clamping and secure fixation of the hob cutter body, reduces vibration, and improves machining quality.

[0007] Furthermore, the number of the guide grooves is less than or equal to the number of the fixing grooves. The number of the guide grooves is less than or equal to the number of the fixing grooves, ensuring that the fixing grooves have corresponding fastening points to avoid loosening and enable the fastening assembly to adapt to different hob bodies.

[0008] Furthermore, the fixed rotating shaft also includes a limiting portion, which is located on one side of the fastening conical portion. The fastening seat also has a limiting hole. The end of the limiting portion close to the fastening conical portion is embedded in the limiting hole, and there is a gap between the shaft shoulder surface of the limiting portion and the hole shoulder surface of the limiting hole.

[0009] Furthermore, the fixed rotating shaft also includes a locking part, the locking part and the limiting part are located on both sides of the fastening conical part, the outer periphery of the locking part has a thread, the fastening seat is located at one end of the locking part and is fixedly connected to the end cover, and the locking part is fixedly connected to the adjusting nut after passing through the end cover.

[0010] Furthermore, the end cover includes a circular ring portion and a connecting portion, the circular ring portion abuts against one end of the fastener, and the connecting portion is fixedly connected to the end of the fastening seat.

[0011] Furthermore, the fastening conical portion has a positioning block protruding outward, the positioning block and the guide block are arranged opposite each other, a positioning groove is formed between the two positioning blocks, the bottom surface of the positioning groove is inclined surface 2, the fastener has a positioning bump protruding away from the rubber bump, the positioning bump is embedded in the positioning groove, inclined surface 1 is located on the positioning bump, and inclined surface 2 abuts against inclined surface 1. By rotating the adjusting nut, the adjusting nut can move the fastener along the fastening conical portion by relying on the axial force of the end cap. Since inclined surface 2 abuts against inclined surface 1, the fastener moves axially and also moves radially outward and is fixed to the fixing groove to axially and radially fix the hob body, preventing the hob body from slipping during rotation and grinding, thereby improving processing accuracy.

[0012] Furthermore, the fastener has a T-slot, and the rubber protrusion is fixedly engaged with the T-slot.

[0013] Furthermore, an elastic reset member is provided between the fastener and the fastening seat.

[0014] Furthermore, the rotating seat is fixedly connected to the grinding motor, the grinding seat is fixedly connected to the rotating seat, and a grinding shaft is slidably connected to the grinding seat. One end of the grinding shaft is fixedly connected to the grinding wheel, and the other end of the grinding shaft is threadedly connected to the motor shaft. Through the abutment mechanism between the rotating seat limit groove and the control box limit block, the angle between the grinding wheel and the inclined rotary cutting blade is automatically calibrated. The rotation of the motor shaft drives the axial movement of the grinding shaft to achieve precise adjustment of the grinding wheel, ensuring that the grinding surface of the inclined rotary cutting blade is better aligned with the grinding wheel, thereby improving the accuracy of the inclined rotary cutting blade.

[0015] Compared with the prior art, the technical effects of the present invention are as follows: 1. By adjusting the grinding angle and stabilizing the hob body, the angle matching between the grinding wheel and the blade is ensured, the hob body is prevented from slipping, and the grinding accuracy is improved. 2. By adjusting the axial preload of the nut, the wedge-shaped extrusion of the fastening conical portion and the inclined surface of the fastener is achieved, combined with the elastic deformation of the rubber bump, to achieve gapless fixation of the hob body, suppress processing vibration, avoid cutting chatter, and improve processing precision. 3. By adjusting the axial preload of the nut and coordinating with the automatic rebound of the elastic reset part, the hob can be quickly disassembled and assembled, non-processing time can be reduced, and the production needs of tools with multiple specifications can be adapted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view of the present invention.

[0017] Figure 2 It is a three-dimensional view of a wheel carrier of the present invention.

[0018] Figure 3 It is a perspective view of the grinding wheel connection structure of the present invention.

[0019] Figure 4 It is a cross-sectional view of the grinding wheel connection structure of the present invention.

[0020] Figure 5 This is a cross-sectional view of the fastening assembly and the fixed shaft of the present invention. Figure 1 .

[0021] Figure 6 This is a cross-sectional view of the fastening assembly and the fixed shaft of the present invention. Figure 2 .

[0022] Figure 7 It is an exploded view of the fastening assembly and the fixed shaft of the present invention.

[0023] Figure 8 It is a three-dimensional view of the fixed rotating shaft of the present invention.

[0024] Figure 9 It is a cross-sectional view of the fastening seat of the present invention.

[0025] Figure 10 It is a perspective view of the fastener of the present invention.

[0026] Explanation of the figure numbers: 1. Workbench; 2. X-axis moving pair; 3. Z-axis moving pair; 4. Control box; 5. Grinding wheel; 6. Headstock; 7. Tailstock; 8. Hob body; 801. Inclined rotary cutting blade; 802. Fixing hole; 803. Fixing groove; 9. Fixed rotating shaft; 901. Fastening tapered part; 9011. Positioning block; 9012. Positioning groove; 9013. Inclined surface 2; 902. Limiting part; 903. Locking part; 10. Positioning block; 11. Rotating shaft; 12. Rotating Moving seat; 1201, limiting groove; 13, fastening seat; 1301, mounting groove; 1302, guide block; 1303, guide groove; 1304, limiting hole; 14, fastener; 1401, inclined surface 1; 1402, positioning protrusion; 15, rubber protrusion; 16, elastic reset member; 17, end cover; 1701, annular portion; 1702, connecting portion; 18, adjusting nut; 19, grinding motor; 20, grinding seat; 21, grinding shaft; 22, motor shaft. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0028] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top" and "bottom" are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0029] according to Figures 1 to 10As shown, a hob cutting and grinding machine includes a workbench 1, on which a headstock 6, a tailstock, and a wheel frame are fixed. The wheel frame includes an X-axis movable pair 2 and a Z-axis movable pair 3. The X-axis movable pair 2 includes an X-axis guide rail, an X-axis slider, and an X-axis driver. The X-axis guide rail is fixed to the workbench 1, and the X-axis slider is slidably connected to the X-axis guide rail. The X-axis driver drives the Z-axis movable pair 3 to reciprocate in the X-axis direction. The X-axis driver can be driven by hydraulic pressure, pneumatic pressure, or motor. The Z-axis movable pair 3 includes a fixed plate, a Z-axis guide rail, a Z-axis slider, and a Z-axis driver. The fixed plate is fixed above the X-axis slider, the Z-axis guide rail is fixed above the fixed plate, the Z-axis slider is slidably fixed to the Z-axis guide rail, and a control box 4 is fixed on the Z-axis slider. The Z-axis driver drives the control box 4 to reciprocate in the Z-axis direction. The Z-axis driver can be driven by hydraulic pressure, pneumatic pressure, or motor. The control box 4 houses a rotating motor, which includes a rotating shaft 11, to which the grinding wheel 5 is rotatably connected. The grinding wheel 5 is precisely positioned via the X-axis translation assembly 2 and the Z-axis translation assembly 3. A stop block 10 is fixed to the control box 4. A rotating base 12 is fixed to the rotating shaft 11, on which the grinding wheel 5 is mounted. The base 12 has a stop slot 1201. The grinding wheel 5 rotates until the stop slot 1201 abuts the stop block 10, aligning the angle of inclination of the grinding wheel 5 with the inclined rotary cutting blade 801. A grinding motor 19 is fixedly connected to the rotating seat 12, a grinding seat 20 is fixedly connected inside the rotating seat 12, a grinding shaft 21 is slidably connected inside the grinding seat 20, one end of the grinding shaft 21 is fixedly connected to the grinding wheel 5, and the other end of the grinding shaft 21 is threadedly connected to the motor shaft 22. The rotation of the motor shaft 22 drives the grinding shaft 21 to move axially to achieve precise adjustment of the grinding wheel 5 so that it better matches the inclined rotary cutting edge 801 of the hob body 8.

[0030] The outer periphery of the hob body 8 is arranged with multiple inclined rotary cutting blades 801 at intervals. The inside of the hob body 8 has a fixing hole 802. The inner wall of the fixing hole 802 is recessed with multiple axially penetrating fixing grooves 803. A fixed shaft 9 is rotatably fixed between the headstock 6 and the tailstock 7. The fixed shaft 9 is fixedly connected to the fastening assembly. The fastening assembly passes through the fixing hole 802 to fix the hob body 8. The fixed shaft 9 includes a fastening conical portion 901. The fastening assembly includes a fastening seat 13, a fastener 14, a rubber bump 15, an elastic reset member 16, an end cover 17 and an adjusting nut 18. The fastening seat 13 The outer surface of the fastener 13 has a clearance fit with the fixing hole 802. The fastening base 13 has multiple mounting slots 1301 within it, with guide blocks 1302 positioned between adjacent mounting slots 1301. A guide slot 1303 is defined within the mounting slot 1301, connecting to the fixing slot 803. A fastener 14 is positioned within the mounting slot 1301. The fastener 14 has an inclined surface 1401 that engages and abuts against the tapered fastening portion 901. A rubber bump 15 is secured to the end of the fastener 14 distal from the inclined surface 1401. The rubber bump 15 passes through the guide slot 1303 and is secured to the fixing slot 803. The number of guide slots 1303 is equal to or less than the number of fixing slots 803. An elastic return member 16 is positioned between the fastener 14 and the fastening base 13.

[0031] The fixed shaft 9 also includes a stopper 902, which is located on one side of the fastening conical portion 901. The fastening seat 13 also has a stopper hole 1304. The end of the stopper 902, which is closest to the fastening conical portion 901, is embedded in the stopper hole 1304, with a gap between the shoulder surface of the stopper 902 and the shoulder surface of the stopper hole 1304. The fixed shaft 9 also includes a locking portion 903. The locking portion 903 and the stopper 902 are located on either side of the fastening conical portion 901. The outer periphery of the locking portion 903 is threaded. The end of the fastening seat 13 located on the locking portion 903 is fixedly connected to the end cap 17. After the locking portion 903 passes through the end cap 17, it is fixedly connected to the adjustment nut 18.

[0032] The end cover 17 includes a first circular portion 1701, a second circular portion 1701 and a connecting portion 1702 connecting the first circular portion 1701 and the second circular portion 1701. The first circular portion 1701 abuts against the outer periphery of the fastening seat 13, the second circular portion 1701 abuts against one end of the fastener 14, and the connecting portion 1702 is fixedly connected to the end of the fastening seat 13.

[0033] The fastening tapered portion 901 has a positioning block 9011 protruding outward. Positioning block 9011 is positioned opposite guide block 1302. A positioning groove 9012 is formed between the two positioning blocks 9011. The bottom surface of positioning groove 9012 is a second inclined surface 9013. Fastener 14 has a positioning block 1402 protruding from the back of the rubber bump 15. Positioning block 1402 is embedded in positioning groove 9012. Inclined surface 1401 is positioned on positioning block 1402, and inclined surface 2 9013 abuts against inclined surface 1401. Fastener 14 has a T-slot, and rubber bump 15 is fixedly engaged with the T-slot.

[0034] Turning the adjusting nut 18 causes the fastener 14 in the fastening assembly to move radially outward along the fixed rotating shaft 9 until the rubber protrusion 15 on the fastener 14 is fixed to the fixing groove 803 in the hob body 8, so that the hob body 8 is stable in the circumferential and axial directions, ensuring that the inclined rotary cutting edge 801 of the hob body 8 is sharpened by the grinding wheel 5 to achieve better circumferential and axial stability, preventing the hob body 8 from slipping and causing poor precision, and improving the processing precision of the hob body 8.

[0035] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection defined by the claims of the present invention.

Claims

1. A hob cutter sharpening machine, comprising a workbench (1), an X-axis moving pair (2) being arranged on the workbench (1), a Z-axis moving pair (3) being arranged on the X-axis moving pair (2), a control box (4) being arranged on the Z-axis moving pair (3), a rotating shaft (11) being arranged in the control box (4), a grinding wheel (5) being rotatably connected to the rotating shaft (11), characterized in that: The hob sharpening machine also includes a headstock (6), a tailstock (7) and a hob body (8); a plurality of inclined rotary cutting blades (801) are arranged at intervals on the outer periphery of the hob body (8); a fixing hole (802) is provided inside the hob body (8); a plurality of axially penetrating fixing grooves (803) are recessed in the inner wall of the fixing hole (802); a fixed rotating shaft (9) is rotatably fixed between the headstock (6) and the tailstock (7); a fastening component is fixedly connected to the fixed rotating shaft (9) The fastening assembly passes through the fixing hole (802) to fix the hob body (8); a limit block (10) is fixedly arranged on the control box (4); a rotating seat (12) is fixedly connected to the rotating shaft (11); a grinding wheel (5) is arranged on the rotating seat (12); the rotating seat (12) has a limit groove (1201); the grinding wheel (5) rotates until the limit groove (1201) abuts against the limit block (10), and the grinding wheel (5) and the inclined rotary cutting blade (801) are matched in inclination angle.

2. A hob cutter grinding machine according to claim 1, characterized in that: The fixed rotating shaft (9) comprises a fastening conical portion (901), and the fastening assembly comprises a fastening seat (13), wherein the fastening seat (13) has a plurality of mounting grooves (1301), and a guide block (1302) is provided between adjacent mounting grooves (1301). A guide groove (1303) connected to the fixing groove (803) is provided on the mounting groove (1301), and a fastener (14) is provided in the mounting groove (1301), and the fastener (14) has an inclined surface (1401) cooperating with the fastening conical portion (901) and abutting against the fastening conical portion (901), and a rubber protrusion (15) is fixedly connected to one end of the fastener (14) away from the inclined surface (1401), and the rubber protrusion (15) passes through the guide groove (1303) and is fixed to the fixing groove (803).

3. A hob cutter grinding machine according to claim 2, characterized in that: The number of the guide grooves (1303) is less than or equal to the number of the fixing grooves (803).

4. A hob cutter grinding machine according to claim 2, characterized in that: The fixed rotating shaft (9) further comprises a limiting portion (902), wherein the limiting portion (902) is located on one side of the fastening conical portion (901), and the fastening seat (13) further comprises a limiting hole (1304), wherein one end of the limiting portion (902) close to the fastening conical portion (901) is embedded in the limiting hole (1304), and a gap is formed between the shaft shoulder surface of the limiting portion (902) and the hole shoulder surface of the limiting hole (1304).

5. A hob cutter grinding machine according to claim 4, characterized in that: The fixed rotating shaft (9) further comprises a locking portion (903), wherein the locking portion (903) and the limiting portion (902) are located on both sides of the fastening conical portion (901), the outer periphery of the locking portion (903) is provided with threads, the fastening seat (13) is located at one end of the locking portion (903) and is fixedly connected to the end cover (17), and the locking portion (903) is fixedly connected to the adjusting nut (18) after passing through the end cover (17).

6. A hob cutter grinding machine according to claim 5, characterized in that: The end cover (17) comprises a circular ring portion (1701) and a connecting portion (1702), wherein the circular ring portion (1701) abuts against one end of the fastener (14), and the connecting portion (1702) is fixedly connected to the end of the fastening seat (13).

7. A hob cutter grinding machine according to claim 2, characterized in that: The fastening conical portion (901) has a positioning block (9011) protruding outward, the positioning block (9011) and the guide block (1302) are arranged opposite to each other, a positioning groove (9012) is formed between the two positioning blocks (9011), the bottom surface of the positioning groove (9012) is a second inclined surface (9013), the fastener (14) has a positioning block (1402) protruding away from the rubber block (15), the positioning block (1402) is embedded in the positioning groove (9012), the first inclined surface (1401) is located on the positioning block (1402), and the second inclined surface (9013) is in contact with the first inclined surface (1401).

8. The hob cutter grinding machine according to claim 7, characterized in that: The fastener (14) has a T-shaped slot, and the rubber protrusion (15) is fixedly engaged with the T-shaped slot.

9. The hob cutter grinding machine according to claim 2, characterized in that: An elastic reset piece (16) is arranged between the fastening piece (14) and the fastening seat (13).

10. A hob cutter grinding machine according to any one of claims 1 to 9, characterized in that: The rotating seat (12) is fixedly connected to a grinding motor (19), the rotating seat (12) is fixedly connected to a grinding seat (20), a grinding shaft (21) is slidably connected to the grinding seat (20), one end of the grinding shaft (21) is fixedly connected to a grinding wheel (5), and the other end of the grinding shaft (21) is threadedly connected to a motor shaft (22).

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