Adjustable tailstock assembly method and tooling for an external cylindrical grinder

Abstract

The present invention discloses an assembly method and tooling for an adjustable tailstock of an external cylindrical grinding machine, characterized by comprising the following steps: S1: assembling the tailstock body and the tooling; S2: adjusting the deformation of the tailstock body; S3: mating and installing the sliding shaft and guide sleeve; S4: installing the guide sleeve telescopic pre-tightening device; S5: installing the guide sleeve and sliding shaft lubricating components; S6: installing the sliding shaft control device; S7: disassembling the calibration rod; S8: installing the fine-tuning device; S9: removing the tooling; wherein, the tailstock body deformation adjustment step in step S2 includes: A1: pre-tightening the tooling and the tailstock body; A2: inserting the calibration rod into the hole on the tailstock body; A3: adjusting the tooling according to the shaft and hole fit between the calibration rod and the tailstock body so that the calibration rod is inserted into the hole of the tailstock body; A4: fixing the calibration rod to the tailstock body; A5: deformably locking the tooling and the tailstock body.

Description

Technical Field

[0001] This invention relates to cylindrical grinding machines, and more specifically to an assembly method and tooling for an adjustable tailstock of a cylindrical grinding machine. Background Technology

[0002] In CNC cylindrical grinding machines, the tailstock is one of the important components. When grinding a workpiece, the tailstock, together with the headstock, supports and centers the workpiece. When grinding high-precision cylindrical surfaces, the geometric accuracy of the tailstock has a significant impact on the machining accuracy. The assembly process plays an even more crucial role in the accuracy of the tailstock.

[0003] The adjustable tailstock body deforms during manufacturing due to the cuts, making it impossible to guarantee its return to the zero position during assembly. Assembly relies heavily on worker experience, leading to poor consistency among components. The micro-adjustment system suffers from low stiffness and efficiency due to variations in tailstock body deformation during installation. Current assembly methods heavily rely on repeated manual trial assembly and calibration, resulting in low assembly efficiency and poor product consistency, impacting the overall assembly efficiency and accuracy of the tailstock. Summary of the Invention

[0004] This application aims to address the problems mentioned in the background section.

[0005] The present invention provides an assembly method for an adjustable tailstock of an external cylindrical grinding machine, comprising the following steps:

[0006] S1: Assemble the tailstock body with the tooling; S2: Adjust the deformation of the tailstock body; S3: Connect and install the sliding shaft and guide sleeve; S4: Install the guide sleeve telescopic pre-tightening device; S5: Install the guide sleeve and sliding shaft lubricating components; S6: Install the sliding shaft control device; S7: Remove the calibration rod; S8: Install the fine-tuning device; S9: Remove the tooling.

[0007] The tailstock deformation adjustment step in step S2 includes: A1: pre-tightening the tooling to the tailstock; A2: inserting the calibration rod into the hole on the tailstock; A3: adjusting the tooling according to the shaft and hole fit between the calibration rod and the tailstock so that the calibration rod is inserted into the hole of the tailstock; A4: fixing the calibration rod to the tailstock; A5: deforming and locking the tooling to the tailstock.

[0008] In one specific embodiment, the step of mating and installing the sliding shaft and guide sleeve in step S3 includes: applying grease evenly to the surface of the sliding shaft, slowly inserting it into the guide sleeve, and then inserting the guide sleeve containing the sliding shaft into the tailstock body.

[0009] In one specific embodiment, the steps of installing the guide sleeve telescopic pre-tightening device in step S4 include: inserting the positioning pin into the positioning pin hole corresponding to the rear end of the sliding shaft, then connecting and fixing the gear seat to the tailstock body, and finally installing the rectangular helical spring, the rear cover, the spring adjusting handwheel, and the cover in sequence.

[0010] In one specific embodiment, the steps of installing the sliding shaft control device in step S6 include: first, installing the needle roller bearing into the gear seat, then installing the thrust washer and the needle roller bearing into the gear seat, installing a flat key on the pin, then fitting the gear onto the pin, tightening the set screw on the gear to fix the gear and the pin, installing the pin with the gear installed into the gear seat as a whole, fitting the washer from the upper end of the pin, installing an oil seal on the upper end of the cover and a bearing on the lower end, vertically installing the installed cover from the upper end of the pin into the gear seat, and installing an adjustable tension handle at the threaded end of the pin.

[0011] In one specific embodiment, the step S7 of installing the fine-tuning device includes: first, fixing the output shaft to the harmonic reducer with hexagonal screws; fixing the limit sleeve to the lead screw with hexagonal screws; then assembling the lead screw with the limit sleeve together with the output shaft assembled in the previous step; then vertically installing this assembled set of components into the tailstock body; next, assembling the input shaft and the upper part of the harmonic reducer, and combining the assembled components with the lower part of the harmonic reducer; installing a set of bearings on the upper and lower parts of the shaft seat; vertically mounting the shaft seat with bearings onto the input shaft from top to bottom; then assembling and combining the shaft seat, harmonic reducer, and tailstock body with screws; attaching a precision nut to the input shaft; and installing the fine-tuning knob.

[0012] The tooling of the present invention includes two side toolings and a rear tooling. The two side toolings are fixed to both sides of the tailstock body, and the rear tooling is fixed to the other side of the tailstock body.

[0013] In one specific embodiment, the side tooling is L-shaped, the bottom of the side tooling is provided with a first bolt that is screwed to the tailstock body, and the top of the side tooling is provided with a first set screw, which abuts against the outer side of the tailstock body.

[0014] In one specific embodiment, the bottom of the rear tooling is provided with a second bolt that is screwed to the tailstock body, and the top of the rear tooling is provided with a second set screw, which abuts against the outer side of the tailstock body. Beneficial effects

[0015] ① This invention adjusts the size of the cut by using the second set screw on the rear tooling, thus restoring the tailstock body from the enlarged cut caused by machining; this invention corrects the change in left and right height of the tailstock body caused by the machining cut by using the first set screw at the top of the side tooling; by pushing the first set screw on each of its left and right sides to the right or left, the deformation of the upper end of the tailstock body cut that has shifted left and right is restored; this invention uses two third set screws at the lower end of the tailstock body to restore the cut on the tailstock body that has become smaller due to machining.

[0016] ② This invention utilizes the form and position tolerances of the calibration rod itself to restore the coaxiality deviation of the holes caused by the machining of the tailstock body, thereby improving the overall installation accuracy.

[0017] ③ The assembly method of the present invention is applicable to the assembly of adjustable tailstocks of various specifications and models. It is especially advantageous for the installation of adjustable tailstocks with large form and position errors due to processing. The method of the present invention is also applicable to the positioning and installation of workpieces with other similar structural forms after cutting, and has high scalability. Attached Figure Description

[0018] Figure 1 This is an assembly flowchart of an adjustable tailstock for an external cylindrical grinding machine according to the present invention;

[0019] Figure 2 This is a structural diagram of the adjustable tailstock and tooling;

[0020] Figure 3 This is a structural schematic diagram of the adjustable tailstock and tooling from another perspective.

[0021] Figure 4 These are installation diagrams for the guide sleeve telescopic pre-tightening device and the guide sleeve and sliding shaft lubrication components.

[0022] Figure 5 This is a schematic diagram of the sliding shaft control device installation;

[0023] Figure 6 This is a schematic diagram of the fine-tuning device installation;

[0024] Figure 7 This is a structural diagram of the tailstock body;

[0025] Figure 8 This is a schematic diagram of the calibration rod.

[0026] In the diagram: 1. Tailstock body; 2. Rear tooling; 3. Side tooling; 4. Calibration rod; 5. Gear seat; 6. Spring adjusting handwheel; 7. Rear cover; 8. Tension handle; 9. Cover; 11. Sliding shaft; 12. Guide sleeve; 13. Rectangular helical spring; 14. Locating pin; 15. Pin shaft; 16. Cover; 17. Gear; 18. Thrust washer and needle roller bearing; 19. Washer; 20. Bearing; 21. Flat key; 22. Oil seal; 23. Lead screw; 24. Limit sleeve; 25. Output shaft; 26. Harmonic reducer; 27. Input shaft; 29. ​​Shaft seat; 31. Fine adjustment knob; 32. Second set screw; 33. First bolt; 34. First set screw; 35. Third set screw; 36. Second bolt. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the terms "center," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "counterclockwise," "clockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Example 1

[0030] See Figures 1-8This embodiment provides an assembly method for an adjustable tailstock of an external cylindrical grinding machine, comprising the following steps: S1: Assembling the tailstock body 1 with the tooling; S2: Adjusting the deformation of the tailstock body 1; S3: Connecting and installing the sliding shaft 11 and guide sleeve 12; S4: Installing the guide sleeve telescopic pre-tightening device; S5: Installing the guide sleeve 12 and the sliding shaft lubricant; S6: Installing the sliding shaft control device; S7: Disassembling the calibration rod 4; S8: Installing the fine-tuning device; S9: Removing the tooling; wherein, the step of adjusting the deformation of the tailstock body 1 in step S2 includes: A1: Pre-tightening the tooling with the tailstock body 1; A2: Inserting the calibration rod 4 into the hole on the tailstock body 1; A3: Adjusting the tooling according to the shaft and hole fit between the calibration rod 4 and the tailstock body 1 so that the calibration rod 4 is inserted into the hole of the tailstock body 1; A4: Fixing the calibration rod 4 onto the tailstock body 1; A5: Deformation locking of the tooling and the tailstock body 1.

[0031] See Figure 4 The steps of installing the sliding shaft and guide sleeve in step S3 include: applying grease evenly to the surface of the sliding shaft 11, slowly inserting it into the guide sleeve 12, and then installing the guide sleeve 12 containing the sliding shaft 11 into the tailstock body 1. During installation, attention should be paid to ensuring that the oil drain hole of the sliding shaft 11 and guide sleeve 12 faces downward.

[0032] See also Figure 4 The steps for installing the guide sleeve telescopic pre-tightening device in step S4 include: inserting the positioning pin 14 into the corresponding positioning pin 14 hole at the rear end of the sliding shaft 11, then connecting and fixing the gear 17 seat 5 to the tailstock body 1, and finally installing the rectangular spiral spring 13, the rear cover 7, the spring adjusting handwheel 6, and the cover 9 in sequence.

[0033] In step S5, the installation of the guide sleeve and sliding shaft lubricant involves installing the oil nozzle at the corresponding position at the top of the tailstock body 1 to ensure good sealing after installation.

[0034] See Figure 5 The steps for installing the sliding shaft control device in step S6 include: first, installing the needle roller bearing 20 into the gear seat, ensuring that the needle roller bearing is sandwiched between the two thrust washers 19; then, installing the thrust washers and the needle roller bearing 18 into the gear seat; installing the flat key 21 onto the pin; then, fitting the gear 17 onto the pin, ensuring that the flat key 21 does not protrude from both ends of the gear 17; tightening the set screws on the gear 17 to fix the gear 17 to the pin; installing the entire pin with the gear 17 installed into the gear seat; fitting the washer 19 onto the upper end of the pin; installing the oil seal 22 onto the upper end of the cover 9 and the bearing 20 onto the lower end; vertically installing the cover 9 onto the gear seat from the upper end of the pin; and installing the adjustable tension handle 8 at the threaded end of the pin.

[0035] Specifically, step S7, disassembling the calibration rod 4, involves ensuring that the first set screw 34, the second set screw 32, and the third set screw 35 at the rear fixture 2, the side fixture 3, and the tailstock 1 are fully stressed, and that the components are connected without deformation or shaking, before removing the calibration rod 4 installed on the tailstock 1.

[0036] See Figure 6 The steps for installing the fine-tuning device in step S8 include: first, fixing the output shaft 25 to the harmonic reducer 26 with hexagonal screws; fixing the limit sleeve 24 to the lead screw 23 with hexagonal screws; then assembling the lead screw 23 with the limit sleeve 24 together with the output shaft 25 assembled in the previous step; then vertically installing this assembled set of components into the tailstock 1; next, assembling the input shaft and the upper part of the harmonic reducer 26, and combining the assembled components with the lower part of the harmonic reducer 26; installing a set of bearings 20 on the upper and lower parts of the shaft seat 29; vertically mounting the shaft seat 29 with bearings 20 onto the input shaft from top to bottom; then assembling and combining the shaft seat 29, the harmonic reducer 26, and the tailstock 1 with screws; attaching a precision nut to the input shaft; and installing the fine-tuning knob 31.

[0037] Specifically, step S9 involves removing the tooling, which means removing the rear tooling 2 and the two side toolings 3 respectively, and removing the third set screw 35 at the lower end of the tailstock body 1. Example 2

[0038] See Figure 2 and Figure 3 The tooling in this embodiment includes two side toolings 3 and one rear tooling 2. The two side toolings 3 are fixed to both sides of the tailstock body 1, and the rear tooling 2 is fixed to the other side of the tailstock body 1.

[0039] The side tooling 3 is L-shaped. The bottom of the side tooling 3 is provided with a first bolt 33 that is screwed to the tailstock body 1. The top of the side tooling 3 is provided with a first set screw 34, which abuts against the outer side of the tailstock body 1.

[0040] The rear tooling 2 has a second bolt 36 at its bottom that is screwed to the tailstock body 1, and a second set screw 32 at its top. The second set screw 32 abuts against the outer side of the tailstock body 1.

[0041] This invention utilizes the second set screw on the rear tooling 2 to adjust the size of the cut, thus restoring the enlarged cut of the tailstock body 1 caused by machining. It also uses the first set screw 34 at the top of the side tooling 3 to correct the change in left-right height of the tailstock body 1 caused by the machining cut. By pushing the first set screw 34 on each side to the right or left, the deformation of the upper part of the cut of the tailstock body 1, which is offset to the left or right, is restored. Furthermore, the invention uses two third set screws 35 at the lower end of the tailstock body 1 to restore the cut on the tailstock body 1 that has become smaller due to machining. Secondly, the invention utilizes the form and position tolerance of the calibration rod 4 itself to restore the coaxiality deviation of the holes in the tailstock body 1 caused by machining, thereby improving the overall installation accuracy. In addition, the assembly method of this invention is applicable to the assembly of various specifications and models of adjustable tailstocks, and is particularly advantageous for the installation of adjustable tailstocks with large form and position errors caused by machining. The method of this invention is also applicable to the positioning and installation of other similar structurally designed workpieces after cutting, exhibiting high scalability.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An assembly method of an adjustable tailstock of an external cylindrical grinder, characterized by, Includes the following steps: S1: Assemble the tailstock body with the tooling; S2: Adjust the deformation of the tailstock body; S3: Connect and install the sliding shaft and guide sleeve; S4: Install the guide sleeve telescopic pre-tightening device; S5: Install the guide sleeve and sliding shaft lubricating components; S6: Install the sliding shaft control device; S7: Calibration rod removal; S8: Install fine-tuning device; S9: Exit tooling; The step S1, which involves assembling the tailstock body with the tooling, includes the following: the tooling includes two side toolings and one rear tooling. The two side toolings are fixed to both sides of the tailstock body, and the rear tooling is fixed to the other side of the tailstock body. The side toolings are L-shaped, with a first bolt at the bottom that is screwed to the tailstock body, and a first set screw at the top of the side tooling, which abuts against the outer side of the tailstock body. The rear tooling has a second bolt at the bottom that is screwed to the tailstock body, and a second set screw at the top of the rear tooling, which abuts against the outer side of the tailstock body. Two third set screws are provided at the lower end of the tailstock body. The tailstock deformation adjustment step in step S2 includes: A1: pre-tightening the tooling to the tailstock; A2: inserting the calibration rod into the hole on the tailstock; A3: adjusting the tooling according to the shaft and hole fit between the calibration rod and the tailstock so that the calibration rod is inserted into the hole of the tailstock; A4: fixing the calibration rod to the tailstock; A5: deforming and locking the tooling to the tailstock. The steps of connecting and installing the sliding shaft and guide sleeve in step S3 include: applying grease evenly to the surface of the sliding shaft, slowly inserting it into the guide sleeve, and then inserting the guide sleeve containing the sliding shaft into the tailstock body. The steps for installing the guide sleeve telescopic pre-tightening device in step S4 include: inserting the positioning pin into the positioning pin hole corresponding to the rear end of the sliding shaft, then connecting and fixing the gear seat to the tailstock body, and finally installing the rectangular helical spring, the rear cover, the spring adjustment handwheel, and the cover in sequence. The steps for installing the sliding shaft control device in step S6 include: first, installing the needle roller bearing into the gear seat, then installing the thrust washer and the needle roller bearing into the gear seat, installing the flat key on the pin, then putting the gear onto the pin, tightening the set screw on the gear to fix the gear and the pin, installing the pin with the gear installed into the gear seat as a whole, putting the washer on the upper end of the pin, installing the oil seal on the upper end of the cover and the bearing on the lower end, vertically installing the installed cover into the gear seat from the upper end of the pin, and installing an adjustable tension handle at the threaded end of the pin. The step of removing the calibration rod in step S7 includes: removing the calibration rod installed on the tailstock body to ensure that the first set screw, second set screw and third set screw at the rear tooling, side tooling and tailstock body are fully stressed, and to ensure that the parts are connected without deformation and shaking. The steps of installing the fine-tuning device in step S8 include: first, fixing the output shaft to the harmonic reducer with hexagonal screws; fixing the limit sleeve to the lead screw with hexagonal screws; then assembling the lead screw with the limit sleeve with the output shaft assembled in the previous step; then vertically installing this assembled set of parts into the tailstock body; next, assembling the input shaft with the upper part of the harmonic reducer; combining the assembled parts with the lower part of the harmonic reducer; installing a set of bearings on the upper and lower parts of the shaft seat; vertically mounting the shaft seat with bearings on the input shaft from top to bottom; then assembling and combining the shaft seat, harmonic reducer and tailstock body with screws; attaching a precision nut to the input shaft; and installing the fine-tuning knob. Specifically, step S9 involves removing the tooling, which means removing the rear tooling and the two side toolings respectively, and removing the third set screw at the lower end of the tailstock body.

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