Ball screw grinding device

Abstract

The utility model relates to the technical field of grinding processing, and specifically discloses a ball screw grinding device, which comprises a spindle box, a tailstock and a grinding wheel support seat, the spindle box is provided with a driving electric spindle, the tailstock is provided with a center, the center and the driving electric spindle are used for tightly pressing a workpiece from two shaft ends of the workpiece, a grinding machine is installed on the grinding wheel support seat, a chuck is detachably connected to the driving electric spindle, the chuck is provided with a positioning through hole, the bottom of the positioning through hole is provided with a locking pin, the outer peripheral part of the workpiece opposite to the positioning through hole is provided with a plane, and the locking pin is used for tightly pressing on the workpiece plane.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, specifically to a ball screw grinding device. Background Technology

[0002] In existing technologies, after grinding the external threads of ball screws, it is often necessary to inspect the pitch and raceway dimensions of the external threads. In traditional inspection methods, grinding and inspection are completed at different workstations. With the development of technology, online inspection immediately after grinding is becoming more and more common, which makes production efficiency higher and processing quality more controllable.

[0003] For example, the patent publication number CN222985887U, "A Thread Composite Grinding Machine with Online Detection", describes a grinding machine that uses a grinding wheel to grind threads on a workpiece and uses an online detection device with a probe to measure the processed threads online. The operation of the grinding wheel is controlled based on the online measurement, thereby achieving real-time compensation and improving production efficiency.

[0004] Furthermore, in the existing technology, the patent publication number CN101569979A, which describes "online detection method and machining center for external thread processing," can also detect the condition of the thread after processing using a testing instrument. This technology uses a laser linear detector for detection.

[0005] However, the current machining process is only suitable for situations where the workpiece is mounted on the machine tool and only the tailstock center and the spindle center are pressed against the two ends of the workpiece for radial and axial positioning. It cannot guarantee the accuracy requirements for situations where the initial position of the diagonal relative position is required. Utility Model Content

[0006] The present invention aims to provide a ball screw grinding processing device to solve the problem that current grinding processing equipment only provides axial and radial positioning of the workpiece but lacks angular positioning.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The ball screw grinding device includes a spindle box, a tailstock, and a grinding wheel support. The spindle box is equipped with a drive electric spindle, and the tailstock is equipped with a center. The center and the drive electric spindle are used to clamp the workpiece from both ends of the workpiece. A grinding wheel is mounted on the grinding wheel support. A chuck is detachably connected to the drive electric spindle. The chuck is equipped with a positioning through hole, and a locking pin is provided at the bottom of the positioning through hole. The outer periphery of the workpiece facing the positioning through hole is provided with a flat surface, and the locking pin is used to abut against the flat surface of the workpiece.

[0008] The principle and advantages of this solution are as follows: Compared with the existing technology, this solution adds a chuck with a positioning through hole and a locking pin, so that when the workpiece is installed on the processing device, the workpiece is not only pressed against from both ends by the active electric spindle and the center, but also one of the parallel planes on the workpiece shaft is pressed against by the locking pin, thereby ensuring that the workpiece installed on the device has radial positioning, axial positioning and angular positioning.

[0009] By controlling the spindle box of the machining device, the active electric spindle ensures that the plane on the workpiece is in a horizontal state every time the device stops, which facilitates the comparison of the external thread of the ball screw before and after machining using an online inspection instrument.

[0010] Preferably, as an improvement, the positioning through hole includes an arc segment and a V-shaped segment, the flared opening of the V-shaped segment being tangent to the arc segment, and a locking pin threadedly connected to the bottom of the arc segment. This design allows for a larger insertion space for the end of the ball screw with the parallel plane into the positioning through hole of the collet, facilitating the rapid insertion of the ball screw into the positioning through hole.

[0011] Preferably, as an improvement, the positioning through hole has an arc segment, and the top of the arc segment is machined with a horizontal surface parallel to the plane of the workpiece, so that angular positioning can be formed after the ball screw is inserted, eliminating the need for multiple adjustments to ensure the parallel plane is level, as is the case with positioning through holes having V-shaped segments and arc segments. The operation is simple and convenient.

[0012] Preferably, as an improvement, an adjusting block is detachably connected to the active electric spindle, and a U-shaped fork is provided on the adjusting block. The U-shaped opening of the U-shaped fork is parallel to the axial direction of the tip, and an adjusting pin is threaded onto the U-shaped fork. The chuck is used to insert into the U-shaped fork and is pressed against by the adjusting pin.

[0013] Preferably, as an improvement, it also includes an online inspection device mounted on a grinding wheel support. The online inspection device includes a three-dimensional spatial mover and a microscope mounted on the three-dimensional spatial mover. The rotating column of the three-dimensional spatial mover can drive the microscope to rotate around the Z-axis. The linear actuator on the three-dimensional spatial mover can drive the microscope to move away from or closer to the Z-axis rotation center. The lifting device on the three-dimensional spatial mover is used to drive the microscope to move up and down along the Z-axis. This solution enables the microscope, as an online inspection device, to be both height-adjustable and movable in the horizontal plane, increasing the adjustment space of the microscope.

[0014] Preferably, as an improvement, the grinding wheel support is fixedly connected to the output end of the Y-axis linear module, and the workpiece axis is the X-axis. This solution allows the movement of the grinding wheel support to move the grinding wheel away from or closer to the workpiece being processed.

[0015] Preferably, as an improvement, the grinding machine includes an electric spindle, a grinding wheel, and a mounting plate, with the electric spindle fixed on the mounting plate and the grinding wheel fixed at the output end of the electric spindle.

[0016] Preferably, as an improvement, the mounting plate is rotatably connected to the grinding wheel support seat via a support positioning pin, the support positioning pin being positioned along the Y-axis; it also includes an adjustment mechanism for adjusting the grinding wheel angle, the adjustment mechanism comprising a worm gear and a sector worm wheel, the worm gear being rotatably connected to the grinding wheel support seat, the sector worm wheel being fixedly connected to the mounting plate, and the rotation center of the sector worm wheel being coaxial with the rotation center of the support positioning pin. This allows the rotation of the worm gear to drive the sector worm wheel to rotate around the center of the support positioning pin, thereby adjusting the angle of the grinding wheel.

[0017] Preferably, as an improvement, the grinding wheel support base is provided with three arc-shaped through holes, two of which are symmetrical about the remaining arc-shaped through hole, and the centers of the three arc-shaped through holes are coaxial. The centers of the three arc-shaped through holes are also coaxial with the support positioning pin. The mounting plate is provided with four mounting holes, two of which are directly opposite the symmetrical arc-shaped through holes, and the remaining two mounting holes are directly opposite the remaining arc-shaped through hole. The mounting plate is locked relative to the grinding wheel support base by inserting bolts into the mounting holes and the arc-shaped through holes. This solution allows the grinding machine to be easily locked after adjustment, improving the installation stability of the grinding machine on the grinding wheel support base.

[0018] Preferably, as an improvement, the spindle box is further equipped with a roller electric spindle, and the output end of the roller electric spindle is equipped with a roller for dressing the shape of the grinding wheel on the grinding machine. Attached Figure Description

[0019] Figure 1 This is a front view of the ball screw product for which this embodiment is applied.

[0020] Figure 2 for Figure 1 The right view.

[0021] Figure 3 for Figure 1 AA sectional view.

[0022] Figure 4 for Figure 1 BB section sectional view.

[0023] Figure 5 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0024] Figure 6 for Figure 5 A schematic diagram of the three-dimensional structure after rotation.

[0025] Figure 7 for Figure 5 Top view.

[0026] Figure 8 for Figure 5 A three-dimensional structural diagram of the spindle box on the worktable and the ball screw blank (i.e., the workpiece) installed on the tailstock.

[0027] Figure 9 for Figure 6 The diagram shows a partial view of the chuck and adjustment block.

[0028] Figure 10 This is a schematic diagram of one type of clamp (from left to right: 3D structural schematic diagram, sectional view, and left view).

[0029] Figure 11 This is a schematic diagram of the clamp in another embodiment.

[0030] Figure 12 This is a three-dimensional structural diagram of the adjustment block in an embodiment of the present invention.

[0031] Figure 13 This is a three-dimensional structural diagram of the grinding wheel machine, online testing instrument, and adjustment mechanism on the grinding wheel support base according to an embodiment of this utility model.

[0032] Figure 14 for Figure 13 Top view.

[0033] Figure 15 for Figure 14 CC section view in the image.

[0034] Figure 16 for Figure 13 Only the main view of the column on the grinding wheel support, the grinding wheel machine, and the adjustment mechanism is displayed.

[0035] Figure 17 for Figure 16 Rear view.

[0036] Figure 18 Figure 16 DD sectional view.

[0037] Figure 19 This is a three-dimensional structural diagram of the grinding wheel support base according to an embodiment of the present utility model.

[0038] The reference numerals in the accompanying drawings include: machine tool 100, X-axis linear module 101, Y-axis linear module 102, spindle box 1, active electric spindle 11, adjusting block 111, chuck 112, locking pin 113, adjusting pin 114, roller electric spindle 12, roller 121, tailstock 2, center 21, grinding wheel support 3, arc-shaped groove 31, arc-shaped through hole 32, grinding wheel machine 4, grinding wheel 41, electric spindle 42, mounting plate 43, adjusting mechanism 6, worm gear 61, sector worm wheel 62, online detector 5, rotating column 511, linear actuator 512, lifting device 513, microscope 52, center of the supporting positioning pin o, ball screw 10, parallel plane 20. Detailed Implementation

[0039] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figures 5 to 19 As shown.

[0040] Combination Figures 5 to 12 A ball screw grinding apparatus includes a machine tool 100, a spindle head 1, a tailstock 2, and a grinding wheel support 3 mounted on the machine tool 100. An electric spindle 11 is mounted on the spindle head 1, and a center 21 is mounted on the tailstock 2. The center 21 and the electric spindle 11 are used to clamp the workpiece from both ends of the workpiece. The machine tool 100 is equipped with an X-axis slide rail and an X-axis linear module 101. A worktable with a T-slot is mounted at the output end of the X-axis linear module 101, with the length direction of the T-slot along the X-axis. The tailstock 2 and the spindle head 1 are both mounted on the worktable. The workpiece axis is the X-axis.

[0041] The machine tool 100 is also equipped with a Y-axis linear module 102. The grinding wheel support 3 is installed at the output end of the Y-axis linear module 102. The Y-axis linear module 102 is used to drive the grinding wheel support 3 to move along the Y-axis.

[0042] A grinding wheel machine 4 is mounted on the grinding wheel support 3.

[0043] An adjusting block 111 is screwed to the eccentric position of the active electric spindle 11. The adjusting block 111 has a U-shaped fork. The U-shaped fork is used to insert a chuck 112. The U-shaped opening of the U-shaped fork is parallel to the axis of the tip 21. Both fork arms of the U-shaped fork have threaded holes for threaded connection of adjusting pins 114. The chuck 112 inserted into the U-shaped fork is pressed against by the adjusting pins 114.

[0044] The chuck 112 has a positioning through hole, and a locking pin is threaded to the bottom of the positioning through hole. The outer periphery of the workpiece facing the positioning through hole has a plane (that is, the outer periphery of the shaft end of the ball screw blank in this embodiment has two parallel planes). The locking pin 113 is used to abut against one of the workpiece planes.

[0045] In one embodiment, combined with Figure 10 The positioning through hole includes an arc segment and a V-shaped segment. The flared opening of the V-shaped segment is tangent to the arc segment, and the locking pin 113 is threadedly connected to the bottom of the arc segment. In another embodiment, combined with... Figure 11 The positioning through hole has an arc segment, and the top of the arc segment is machined with a horizontal surface parallel to the workpiece plane, so that the ball screw can be angularly positioned immediately after insertion. Unlike positioning through holes with V-shaped segments and arc segments, it does not require multiple adjustments to ensure the plane is level, making the operation simple and convenient.

[0046] Combination Figures 13 to 19 The device also includes an online inspection instrument 5 mounted on a grinding wheel support 3. The online inspection instrument 5 includes a three-dimensional spatial mover and a microscope 52 mounted on the three-dimensional spatial mover. The three-dimensional spatial mover includes a rotating column 511, a linear actuator 512, and a lifter 513. The rotating column 511 is mounted on the grinding wheel support 3, and its output end is capable of rotating around the Z-axis. The linear actuator 512 is fixed to the output end of the rotating column 511 and is horizontally positioned. The linear actuator 512 is used to move the microscope 52 away from or towards the Z-axis rotation center. The lifter 513 is mounted on the output end of the linear actuator 512, and the microscope 52 is mounted on the output end of the lifter 513. The lifter 513 is used to move the microscope 52 up and down along the Z-axis. This embodiment allows the microscope 52, serving as the online inspection instrument 5, to be both height-adjustable and movable in the horizontal plane, increasing the adjustment space of the microscope 52.

[0047] The grinding machine 4 includes an electric spindle 42, a grinding wheel 41, and a mounting plate 43. The electric spindle 42 is fixed on the mounting plate 43, and the grinding wheel 41 is fixed on the output end of the electric spindle 42. The mounting plate 43 is rotatably connected to the grinding wheel support seat 3 through a support positioning pin.

[0048] The device also includes an adjustment mechanism 6 for adjusting the angle of the grinding wheel 41. The adjustment mechanism 6 includes a worm 61 and a sector worm wheel 62. The worm 61 is rotatably connected to the grinding wheel support 3, and the sector worm wheel 62 is fixedly connected to the mounting plate 43. The rotation center of the sector worm wheel 62 is coaxial with the rotation center o of the support positioning pin. The sector worm wheel 62 is accommodated in an arc-shaped groove 31 provided on the grinding wheel support 3. The worm 61 is used to drive the sector worm wheel 62 to move within the arc-shaped groove 31, so that the rotation of the worm 61 can drive the mounting plate 43 to rotate around the center o of the support positioning pin in the arc-shaped groove 31, thereby adjusting the angle of the grinding wheel 4.

[0049] To ensure that the angle of the grinding wheel 41 does not easily change after the adjustment mechanism 6 adjusts the angle, three arc-shaped through holes 32 are machined on the grinding wheel support 3. Two of the arc-shaped through holes 32 are symmetrical about the remaining arc-shaped through hole 32, and the centers of the three arc-shaped through holes 32 are coaxial. The centers of the three arc-shaped through holes 32 are also coaxial with the center o of the support positioning pin. Four mounting holes are opened on the mounting plate 43. Two of the mounting holes are directly opposite the symmetrical arc-shaped through holes 32, and the remaining two mounting holes are directly opposite the remaining arc-shaped through hole 32. The mounting plate 43 is locked relative to the grinding wheel support 3 by inserting bolts into the mounting holes and the arc-shaped through holes 32.

[0050] In addition, a roller electric spindle 12 is installed on the spindle box 1. A roller 121 is installed at the output end of the roller electric spindle 12. The roller 121 is used to dress the shape of the grinding wheel 41 on the grinding machine 4.

[0051] This embodiment is used for processing to obtain... Figures 1 to 4 External threads on the product.

[0052] In this embodiment, the ball screw blank (i.e., the workpiece) is installed between the active electric spindle 11 and the center 21, and the chuck 112 is kept directly above the workpiece axis. After the two parallel planes of the ball screw blank are in a horizontal state, the workpiece is locked relative to the chuck 112 with the locking pin 113, so that the chuck 112 is locked with the adjusting block 111. The microscope 52 of the online inspection instrument 5 records image data before the workpiece is processed. After each workpiece stop, it ensures that the workpiece is in the initial clamping position, that is, it ensures that the two parallel planes of the screw are still in a horizontal state. This helps to ensure that the image data displayed by the microscope 52 is the data before and after the external thread processing of the same area, which facilitates the microscope 52 to perform inspection after each stop.

[0053] Based on the test results, the worker can loosen the fixing of the mounting plate 43 on the grinding machine 4 in the mounting hole, and adjust the grinding angle of the grinding wheel 41 on the grinding machine 4 by adjusting the rotation of the worm 61. After the adjustment is completed, the mounting plate 43 and the grinding wheel support 3 are locked again.

[0054] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A ball screw grinding apparatus, comprising a spindle box, a tailstock, and a grinding wheel support, wherein the spindle box is equipped with a drive electric spindle, the tailstock is equipped with a center, the center and the drive electric spindle are used to clamp the workpiece from both ends of the workpiece, and a grinding wheel is mounted on the grinding wheel support, characterized in that: A collet is detachably connected to the active electric spindle. The collet has a positioning through hole, and a locking pin is provided at the bottom of the positioning through hole. The outer periphery of the workpiece facing the positioning through hole has a flat surface, and the locking pin is used to press against the flat surface of the workpiece.

2. The ball screw grinding apparatus according to claim 1, characterized in that: The positioning through hole includes an arc segment and a V-shaped segment. The flared opening of the V-shaped segment is tangent to the arc segment, and the locking pin is threadedly connected to the bottom of the arc segment.

3. The ball screw grinding apparatus according to claim 2, characterized in that: The positioning through hole has an arc segment, and the top of the arc segment is machined with a horizontal surface parallel to the plane of the workpiece.

4. The ball screw grinding apparatus according to claim 3, characterized in that: An adjusting block is detachably connected to the active electric spindle. The adjusting block is equipped with a U-shaped fork. The U-shaped opening of the U-shaped fork is parallel to the axial direction of the tip. An adjusting pin is threaded onto the U-shaped fork. The collet is inserted into the U-shaped fork and is pressed against by the adjusting pin.

5. The ball screw grinding apparatus according to any one of claims 1-4, characterized in that: It also includes an online inspection instrument mounted on a grinding wheel support. The online inspection instrument includes a three-dimensional spatial mover and a microscope mounted on the three-dimensional spatial mover. The rotating column of the three-dimensional spatial mover can drive the microscope to rotate around the Z-axis. The linear actuator on the three-dimensional spatial mover can drive the microscope to move away from or closer to the center of rotation of the Z-axis. The lifting device on the three-dimensional spatial mover is used to drive the microscope to move up and down along the Z-axis.

6. The ball screw grinding apparatus according to any one of claims 1-4, characterized in that: The grinding wheel support is fixedly connected to the output end of the Y-axis linear module.

7. The ball screw grinding apparatus according to claim 6, characterized in that: The grinding machine includes an electric spindle, a grinding wheel, and a mounting plate. The electric spindle is fixed on the mounting plate, and the grinding wheel is fixed at the output end of the electric spindle.

8. The ball screw grinding apparatus according to claim 7, characterized in that: The mounting plate is rotatably connected to the grinding wheel support seat via a support positioning pin, which is set along the Y-axis. It also includes an adjustment mechanism for adjusting the grinding wheel angle, which includes a worm and a sector worm wheel. The worm is rotatably connected to the grinding wheel support seat, and the sector worm wheel is fixedly connected to the mounting plate. The rotation center of the sector worm wheel is coaxial with the rotation center of the support positioning pin.

9. The ball screw grinding apparatus according to claim 8, characterized in that: The grinding wheel support has three arc-shaped through holes, two of which are symmetrical about the remaining arc-shaped through hole. The centers of the three arc-shaped through holes are coaxial, and the centers of the three arc-shaped through holes are coaxial with the support positioning pin. The mounting plate has four mounting holes, two of which are directly opposite the symmetrical arc-shaped through holes, and the remaining two mounting holes are directly opposite the remaining arc-shaped through hole. The mounting plate is locked relative to the grinding wheel support by inserting bolts into the mounting holes and the arc-shaped through holes.

10. The ball screw grinding apparatus according to any one of claims 1-4 and 7-9, characterized in that: The spindle box is also equipped with a roller electric spindle, and the output end of the roller electric spindle is equipped with a roller, which is used to dress the shape of the grinding wheel on the grinding machine.

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