Center precision rapid adjusting mechanism and method

Abstract

The invention provides a tip precision rapid adjusting mechanism and method.The tip precision rapid adjusting mechanism comprises a tip seat, a ball bowl assembly is installed in a seat hole of the tip seat, the top of the ball bowl assembly is pressed and fixed through a flange plate, a ball head is installed in the ball bowl assembly in a spherical surface fit mode, and an installation shaft is fixedly installed in the ball head; the top end of the installation shaft is fixed through a nut, the center is fixedly installed in the installation shaft, the lower portion of the installation shaft penetrates through the adjusting ring, the adjusting ring is fixedly installed at the bottom end of a seat hole of the center seat, a plurality of evenly-distributed set screws are installed in the radial direction of the adjusting ring in a matched mode through threads, and the inner end faces of the set screws make contact with the outer wall of the installation shaft. The radial position of the center can be accurately adjusted, the coaxial requirement for rotation of the center and the rotary table is met, the whole adjusting process is light, convenient and rapid, meanwhile, the precision is higher, and the structure is convenient to install, stable and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tool components, and in particular to a top-precision rapid adjustment mechanism and method. Background Art

[0002] During the workpiece processing process of the machine tool, the workpiece is usually installed on a rotary table, and the center center of the workpiece is used to support and position it to ensure the installation and processing accuracy of the workpiece. When actually installing the center, the coaxiality of the center relative to the rotary table must be ensured.

[0003] See also Figure 2 In traditional machine tool processing, the adjustment of the top precision is based on the overall moving top seat A to drive the top A to move (traditional structure A); see Figure 3 , some also install the top B in the top sleeve B, and move the top by moving the top sleeve B (traditional structure B). The biggest disadvantage of traditional structure A is that when the top seat A is moved as a whole to move the top, the top seat A is relatively large and heavy, and the adjustment process is very inconvenient. The installation base surface of the top seat A is relatively large, and the accuracy of the base surface itself and the tightness of the screws that tighten the top seat A will have a great impact on the installation accuracy of the top A. It is usually necessary to manually scrape the flatness of the installation reference surface of the top seat A, and the screws that tighten the top seat A also have a sequence when tightening. There are high requirements for the processing of parts and the skills of operators, and the cost is very high. The disadvantage of traditional structure B is that the top B is installed in the top sleeve B, and when the top B is moved by moving the top sleeve B, there is a certain gap between the top sleeve B and the top seat B. The positioning accuracy and rigidity of the top B are relatively poor when it is positioned only by the end face of the top sleeve B. At the same time, when adjusting the top sleeve B, it is necessary to loosen the screws and knock the top sleeve B to move the top B. The process is very troublesome and the accuracy is also unstable. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a mechanism and method for quickly adjusting the precision of the top. By adopting this mechanism, it is only necessary to assemble the parts as required, install the top on the mounting shaft, and install a ball head on the mounting shaft. The ball head can rotate in the ball bowl. The mounting shaft is pushed by the set screws in four directions on the adjusting ring, and the mounting shaft rotates around the ball head. In this way, the radial position of the top can be accurately adjusted to ensure the coaxial requirement of the rotation of the top and the turntable. The entire adjustment process is light and fast, and the accuracy will be more accurate. This structure is easy to install and is stable and reliable.

[0005] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: a top precision quick adjustment mechanism includes a top seat, a ball bowl assembly is installed inside the seat hole of the top seat, the top of the ball bowl assembly is pressed and fixed by a flange, a ball head is installed inside the ball bowl assembly through spherical matching, a mounting shaft is fixedly installed inside the ball head, the top of the mounting shaft is fixed by a nut, a top is fixedly installed inside the mounting shaft, the lower part of the mounting shaft passes through an adjusting ring, and the adjusting ring is fixedly installed at the bottom end of the seat hole of the top seat, and a plurality of evenly distributed set screws are installed in the radial direction of the adjusting ring through threaded matching, and the inner end face of the tightening screw is in contact with the outer wall of the mounting shaft.

[0006] Preferably, the ball bowl assembly includes a lower ball bowl located inside the seat hole, an adjustment pad is positioned and installed on the top of the lower ball bowl, an upper ball bowl is positioned and installed on the top of the adjustment pad, the top of the upper ball bowl is pressed and fixed by a flange, and the ball head is positioned and installed between the lower ball bowl and the upper ball bowl through spherical fit.

[0007] Preferably, the lower ball bowl and the upper ball bowl adopt the same structure, and respectively include a ball bowl body, a ball bowl center hole is processed in the center of the ball bowl body, and an inner spherical surface is processed on one side of the ball bowl center hole.

[0008] Preferably, the flange is fixedly mounted on the top of the top seat by a first screw.

[0009] Preferably, an upper center hole is machined on the center upper portion of the mounting shaft, a tapered hole is machined on the lower portion of the upper center hole, and the top is fixedly mounted inside the upper center hole and the tapered hole; The upper outer wall of the mounting shaft is processed with an external thread for mounting a nut, and an annular groove is provided at the end of the external thread. The other side of the annular groove is an optical axis section, which cooperates with the ball head, and a positioning step is provided at the lower part of the optical axis section. The lower part of the positioning step is a seat hole matching section, which cooperates with the seat hole, and the lower part of the seat hole matching section is an adjusting ring positioning section, which cooperates with the adjusting ring hole of the adjusting ring.

[0010] Preferably, the ball head includes a ball head body, the top of the ball head body is provided with an upper outer spherical surface, the bottom end of the ball head body is provided with a lower outer spherical surface, the upper outer spherical surface and the lower outer spherical surface are respectively matched with the inner spherical surfaces of the upper ball bowl and the lower ball bowl, and a ball head center hole is processed in the center of the ball head body.

[0011] Preferably, a clearance fit is adopted between the seat hole fitting section of the mounting shaft and the lower ball bowl, and the clearance is at least 0.2 mm; The seat hole fitting section and the seat hole are clearance-fitted, and the clearance is at least 0.2 mm; The adjusting ring positioning section and the adjusting ring are clearance-fitted, and the clearance is at least 0.2 mm.

[0012] Preferably, the adjustment ring includes an adjustment ring body, an adjustment ring hole is processed in the center of the adjustment ring body, a positioning sleeve is processed at the top end of the adjustment ring body, the positioning sleeve cooperates with the seat hole, the adjustment ring body is processed with evenly arranged stepped holes, and the radial direction of the adjustment ring body is processed with multiple radial threaded holes, and the inside of the radial threaded holes is used to cooperate with the installation of tightening screws.

[0013] Preferably, the adjusting ring is fixedly connected to the bottom end of the top seat by a second screw installed at the location of the stepped hole; The number of the radial threaded holes is four and they are evenly arranged; A flat surface is machined at the location of one of the radial threaded holes of the adjusting ring body.

[0014] Another aspect of the present invention provides a method for adjusting a top-precision rapid adjustment mechanism, comprising the following steps: Step 1, ball head installation: Fix the ball head on the mounting shaft with a nut; Step 2, installation of the bowl assembly: Place the lower bowl into the seat hole of the top seat, and then place the adjustment pad, the mounting shaft assembly in step 1, the upper bowl, and the flange in sequence. Secure the flange to the top seat, and control the clearance between the ball head and the upper and lower bowls by grinding the adjustment pad. Press the upper and lower bowls tightly by adjusting the flange to ensure that the mounting shaft is fixed in position when it moves up and down. Step 3, installation of the adjusting ring: Pass the adjusting ring through the mounting shaft and fix the adjusting ring on the bottom end of the top seat; Step 4, top installation: Fix the top tip inside the mounting shaft; Step 5, axial position adjustment of the top: Install the tightening screw on the adjusting ring and press it against the outer circle of the mounting shaft. By adjusting the tightening screws in four directions, ensure that the center rotates coaxially with respect to the turntable.

[0015] The present invention has the following beneficial effects: 1. The present invention can be used to quickly adjust the coaxial requirements of the top relative to the turntable through the above-mentioned quick adjustment mechanism. By assembling the parts in place, the top is installed on the mounting shaft, and the mounting shaft is equipped with a ball head. The ball head can rotate in the ball bowl. The mounting shaft is pushed by the set screws in four directions on the adjusting ring, and the mounting shaft rotates around the ball head. In this way, the radial position of the top can be accurately adjusted to ensure the coaxial requirements of the rotation of the top and the turntable. The entire adjustment process is light and fast, and the accuracy will be more accurate. This structure is easy to install and is stable and reliable.

[0016] 2. The present invention ensures that the mounting shaft can rotate within a certain range, facilitating subsequent coaxial adjustment, by employing a clearance fit of at least 0.2 mm between the seat hole-matching section of the mounting shaft and the lower bowl; a clearance fit of at least 0.2 mm between the seat hole-matching section and the seat hole; and a clearance fit of at least 0.2 mm between the adjustment ring positioning section and the adjustment ring.

[0017] 3. The position of the mounting shaft can be adjusted by setting four sets of set screws, and fixed after the adjustment is completed to ensure the coaxiality between the mounting shaft and the rotary table. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is the structural diagram of traditional structure A.

[0021] Figure 3 This is the structural diagram of traditional structure B.

[0022] Figure 4 This is the main sectional view of the installation shaft of the present invention.

[0023] Figure 5 This is a top view of the adjustment ring of the present invention.

[0024] Figure 6 It is a side sectional view of the adjustment ring of the present invention.

[0025] Figure 7 This is a three-dimensional diagram of the bowl of the present invention.

[0026] Figure 8 It is a three-dimensional diagram of the ball head of the present invention.

[0027] In the figure: top seat 1, flange 2, first screw 3, nut 4, upper bowl 5, adjustment washer 6, ball head 7, lower bowl 8, mounting shaft 9, tightening screw 10, second screw 11, adjusting ring 12, top 13, rotating table 14, seat hole 15; Inner spherical surface 501, ball bowl center hole 502, ball bowl body 503; Upper outer spherical surface 701, ball head body 702, lower outer spherical surface 703, ball head center hole 704; External thread 901, annular groove 902, upper center hole 903, optical axis section 904, positioning step 905, seat hole matching section 906, adjustment ring positioning section 907, tapered hole 908; Adjustment ring body 1201 , stepped hole 1202 , adjustment ring hole 1203 , radial threaded hole 1204 . DETAILED DESCRIPTION The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0028] Example 1: See also Figure 1 、 4 -8, a mechanism for rapid adjustment of top precision, comprising a top seat 1, a ball bowl assembly installed inside the seat hole 15 of the top seat 1, the top of the ball bowl assembly being pressed and fixed by a flange 2, a ball head 7 being installed inside the ball bowl assembly through spherical fit, a mounting shaft 9 being fixedly installed inside the ball head 7, the top of the mounting shaft 9 being fixed by a nut 4, a top 13 being fixedly installed inside the mounting shaft 9, the lower part of the mounting shaft 9 passing through an adjusting ring 12, the adjusting ring 12 being fixedly installed at the bottom end of the seat hole 15 of the top seat 1, a plurality of evenly distributed set screws 10 being installed in the radial direction of the adjusting ring 12 through threaded fit, and the inner end face of the tightening screw 10 is in contact with the outer wall of the mounting shaft 9. The present invention can be used to quickly adjust the coaxial requirements of the top relative to the turntable through the above-mentioned quick adjustment mechanism. By assembling the parts in place, the top is installed on the mounting shaft, and the mounting shaft is equipped with a ball head. The ball head can rotate in the ball bowl, and the mounting shaft is pushed by the set screws in four directions on the adjustment ring. The mounting shaft rotates around the ball head. In this way, the radial position of the top can be accurately adjusted to ensure the coaxial requirements of the rotation of the top and the turntable. The entire adjustment process is light and fast, and the accuracy will be more accurate. This structure is easy to install and is stable and reliable.

[0029] Furthermore, the bowl assembly includes a lower bowl 8 positioned within the seat hole 15. An adjustment pad 6 is positioned and mounted on the top of the lower bowl 8. An upper bowl 5 is positioned and mounted on the top of the adjustment pad 6. The top of the upper bowl 5 is compressed and fixed by a flange 2. The ball head 7 is positioned and mounted between the lower bowl 8 and the upper bowl 5 via a spherical fit. The bowl assembly described above enables the ball head 7 to be positioned and fitted, thereby enabling the position of the ball head 7 to be adjusted. The position of the mounting shaft 9 can also be adjusted via the ball head 7, and the position of the top 13 can also be adjusted via the mounting shaft 9.

[0030] Furthermore, the lower bowl 8 and the upper bowl 5 have the same structure, each comprising a bowl body 503, with a bowl center hole 502 machined in the center of the bowl body 503 and an inner spherical surface 501 machined on one side of the bowl center hole 502. The bowl center hole 502 facilitates the insertion of the mounting shaft 9, while the inner spherical surface 501 facilitates spherical engagement with the ball head 7.

[0031] Furthermore, the flange 2 is fixedly mounted on the top of the top seat 1 by means of a first screw 3. The first screw 3 can be used to reliably fix the flange 2, thereby reliably fixing the bowl assembly.

[0032] Furthermore, an upper center hole 903 is processed on the upper center portion of the mounting shaft 9, a tapered hole 908 is processed on the lower portion of the upper center hole 903, and the top 13 is fixedly installed inside the upper center hole 903 and the tapered hole 908; an external thread 901 for mounting the nut 4 is processed on the upper outer wall of the mounting shaft 9, and an annular groove 902 is provided at the end of the external thread 901, and the other side of the annular groove 902 is an optical axis section 904, which cooperates with the ball head 7, and a positioning step 905 is provided on the lower portion of the optical axis section 904, and the lower portion of the positioning step 905 is a seat hole matching section 906, which cooperates with the seat hole 15, and the lower portion of the seat hole matching section 906 is an adjusting ring positioning section 907, which cooperates with the adjusting ring hole 1203 of the adjusting ring 12. The ball head 7 and the top 13 can be installed through the above-mentioned installation shaft 9, which facilitates the subsequent position adjustment of the top 13 and ensures that the installation shaft 9 can be adjusted within a certain range inside the ball head 7.

[0033] Furthermore, the ball head 7 includes a ball head body 702, the top of which is provided with an upper outer spherical surface 701, and the bottom of which is provided with a lower outer spherical surface 703. The upper outer spherical surface 701 and the lower outer spherical surface 703 respectively mate with the inner spherical surface 501 of the upper bowl 5 and the lower bowl 8. A ball head center hole 704 is machined in the center of the ball head body 702. The above-described ball head 7 facilitates subsequent mating with the lower bowl 8 and the upper bowl 5.

[0034] Furthermore, a clearance fit is adopted between the seat hole fitting section 906 of the mounting shaft 9 and the lower ball bowl 8, and the clearance is at least 0.2 mm; The seat hole fitting section 906 and the seat hole 15 are clearance-fitted, and the clearance is at least 0.2 mm; The adjustment ring positioning section 907 and the adjustment ring 12 are clearance-fitted, and the clearance is at least 0.2 mm.

[0035] The above-mentioned clearance fit ensures that the mounting shaft 9 can be subsequently adjusted within a certain angle range.

[0036] Furthermore, the adjustment ring 12 includes an adjustment ring body 1201, an adjustment ring hole 1203 is machined in the center of the adjustment ring body 1201, a positioning sleeve 1206 is machined at one end of the top of the adjustment ring body 1201, and the positioning sleeve 1206 cooperates with the seat hole 15. The adjustment ring body 1201 is machined with evenly arranged stepped holes 1202, and the adjustment ring body 1201 is machined in the radial direction with multiple radial threaded holes 1204. The radial threaded holes 1204 are used to cooperate with the installation of the tightening screws 10. The above-mentioned adjustment ring 12 facilitates the subsequent position adjustment of the mounting shaft 9.

[0037] Furthermore, the adjusting ring 12 is fixedly connected to the bottom end of the top seat 1 by a second screw 11 installed at the location of the stepped hole 1202 , thereby achieving reliable fixation of the adjusting ring 12 .

[0038] Furthermore, the number of the radial threaded holes 1204 is four groups, and they are evenly arranged; by adopting four groups, the position of the mounting shaft 9 can be adjusted.

[0039] Furthermore, a flat surface 1205 is machined at the location of one of the radial threaded holes 1204 of the adjusting ring body 1201. The flat surface 1205 facilitates circumferential positioning of the adjusting ring body 1201.

[0040] Example 2: Another aspect of the present invention provides a method for adjusting a top-precision rapid adjustment mechanism, comprising the following steps: Step 1, installation of ball head 7: The ball head 7 is fixedly mounted on the mounting shaft 9 via the nut 4; Step 2, installation of the bowl assembly: Place the lower ball bowl 8 into the seat hole 15 of the top seat 1, and place the adjustment pad 6, the installation shaft 9 assembly in step 1, the upper ball bowl 5 and the flange 2 in sequence. Fix the flange 2 to the top seat 1, and control the gap between the ball head 7 and the upper ball bowl 5 and the lower ball bowl 8 by grinding the adjustment pad 6. Press the upper ball bowl 5 and the lower ball bowl 8 by adjusting the flange 2 to ensure that the installation shaft 9 is fixed when it moves up and down. Step 3, installation of the adjusting ring 12: Pass the adjusting ring 12 through the mounting shaft 9 and fix the adjusting ring 12 to the bottom end of the top seat 1; Step 4, installation of top 13: The top 13 is fixedly mounted inside the mounting shaft 9; Step 5, axial position adjustment of the top 13: Install the tightening screw 10 into the adjusting ring 12 and press it against the outer circle of the mounting shaft 9. By adjusting the tightening screw 10 in four directions, the coaxial requirement of the top 13 relative to the rotating table 14 can be ensured.

Claims

1. A top precision quick adjustment mechanism, comprising a top seat (1), characterized in that: A ball bowl assembly is installed inside the seat hole (15) of the top seat (1), and the top of the ball bowl assembly is pressed and fixed by a flange (2). A ball head (7) is installed inside the ball bowl assembly through spherical matching. A mounting shaft (9) is fixedly installed inside the ball head (7). The top of the mounting shaft (9) is fixed by a nut (4). A top (13) is fixedly installed inside the mounting shaft (9). The lower part of the mounting shaft (9) passes through an adjusting ring (12). The adjusting ring (12) is fixedly installed at the bottom end of the seat hole (15) of the top seat (1). A plurality of evenly distributed set screws (10) are installed in the radial direction of the adjusting ring (12) through thread matching. The inner end surface of the tightening screw (10) contacts the outer wall of the mounting shaft (9).

2. The top precision rapid adjustment mechanism according to claim 1, characterized in that: The ball bowl assembly comprises a lower ball bowl (8) located inside the seat hole (15), an adjustment pad (6) is positioned and installed on the top of the lower ball bowl (8), an upper ball bowl (5) is positioned and installed on the top of the adjustment pad (6), the top of the upper ball bowl (5) is pressed and fixed by a flange (2), and a ball head (7) is positioned and installed between the lower ball bowl (8) and the upper ball bowl (5) through spherical matching.

3. The top precision rapid adjustment mechanism according to claim 2, characterized in that: The lower ball bowl (8) and the upper ball bowl (5) have the same structure, and each includes a ball bowl body (503). A ball bowl center hole (502) is machined at the center of the ball bowl body (503), and an inner spherical surface (501) is machined on one side of the ball bowl center hole (502).

4. The top precision rapid adjustment mechanism according to claim 1, characterized in that: The flange (2) is fixedly mounted on the top of the top seat (1) by means of a first screw (3).

5. The top precision rapid adjustment mechanism according to claim 3, characterized in that: An upper center hole (903) is machined on the center upper portion of the mounting shaft (9), a tapered hole (908) is machined on the lower portion of the upper center hole (903), and a top (13) is fixedly mounted inside the upper center hole (903) and the tapered hole (908); The upper outer wall of the mounting shaft (9) is processed with an external thread (901) for mounting the nut (4), and an annular groove (902) is provided at the end of the external thread (901). The other side of the annular groove (902) is an optical axis section (904), and the optical axis section (904) cooperates with the ball head (7). The lower part of the optical axis section (904) is provided with a positioning step (905), and the lower part of the positioning step (905) is a seat hole matching section (906), and the seat hole matching section (906) cooperates with the seat hole (15). The lower part of the seat hole matching section (906) is an adjustment ring positioning section (907), and the adjustment ring positioning section (907) cooperates with the adjustment ring hole (1203) of the adjustment ring (12).

6. The top precision rapid adjustment mechanism according to claim 5, characterized in that: The ball head (7) comprises a ball head body (702), the top end of the ball head body (702) is provided with an upper outer spherical surface (701), the bottom end of the ball head body (702) is provided with a lower outer spherical surface (703), the upper outer spherical surface (701) and the lower outer spherical surface (703) respectively cooperate with the inner spherical surfaces (501) of the upper ball bowl (5) and the lower ball bowl (8), and a ball head center hole (704) is processed in the center of the ball head body (702).

7. The top precision rapid adjustment mechanism according to claim 5, characterized in that: A clearance fit is adopted between the seat hole fitting section (906) of the mounting shaft (9) and the lower ball bowl (8), and the clearance is at least 0.2 mm; A clearance fit is adopted between the seat hole fitting section (906) and the seat hole (15), and the clearance is at least 0.2 mm; A clearance fit is adopted between the adjustment ring positioning section (907) and the adjustment ring (12), and the clearance is at least 0.2 mm.

8. The top precision rapid adjustment mechanism according to claim 5, characterized in that: The adjusting ring (12) comprises an adjusting ring body (1201), an adjusting ring hole (1203) is machined at the center of the adjusting ring body (1201), a positioning sleeve (1206) is machined at one end of the top of the adjusting ring body (1201), the positioning sleeve (1206) is matched with the seat hole (15), the adjusting ring body (1201) is machined with evenly arranged stepped holes (1202), and a plurality of radial threaded holes (1204) are machined in the radial direction of the adjusting ring body (1201), and the interior of the radial threaded holes (1204) is used to cooperate with the installation of the tightening screws (10).

9. The top precision rapid adjustment mechanism according to claim 8, characterized in that: The adjusting ring (12) is fixedly connected to the bottom end of the top seat (1) via a second screw (11) installed at the location of the stepped hole (1202); The radial threaded holes (1204) are four in number and are evenly arranged; A flat surface (1205) is machined at the location of one of the radial threaded holes (1204) of the adjusting ring body (1201).

10. The method for adjusting a top precision rapid adjustment mechanism according to any one of claims 5 to 9, characterized in that: The following steps are involved: Step 1, installation of ball head (7): The ball head (7) is fixedly mounted on the mounting shaft (9) through the nut (4); Step 2, installation of the bowl assembly: Place the lower ball bowl (8) into the seat hole (15) of the top seat (1), and then place the adjustment pad (6), the installation shaft (9) assembly in step 1, the upper ball bowl (5) and the flange (2) in sequence. Fix the flange (2) to the top seat (1), and control the gap between the ball head (7) and the upper ball bowl (5) and the lower ball bowl (8) by grinding the adjustment pad (6). Press the upper ball bowl (5) and the lower ball bowl (8) by adjusting the flange (2) to ensure that the installation shaft (9) can move up and down. Step 3, installation of the adjusting ring (12): Pass the adjusting ring (12) through the mounting shaft (9) and fix the adjusting ring (12) to the bottom end of the top seat (1); Step 4, installation of the top (13): The top (13) is fixedly mounted inside the mounting shaft (9); Step 5, axial position adjustment of the top (13): Install the jacking screw (10) into the adjusting ring (12) and press it against the outer circle of the mounting shaft (9). By adjusting the jacking screw (10) in four directions, ensure that the top (13) rotates coaxially with respect to the rotating table (14).

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