A stable large high-precision horizontal machining center built-in tool setting device
By employing support and measuring mechanisms in the built-in tool setting device of the horizontal machining center, the effects of thermal deformation of the spindle box are isolated, solving the problems of inaccurate tool setting and tedious manual tool setting, thus achieving high-precision and high-efficiency machining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QI ZHONG SHU KONG ZHUANG BEI GU FEN YOU XIAN GONG SI
- Filing Date
- 2024-12-23
- Publication Date
- 2026-07-07
AI Technical Summary
The built-in tool setting device in existing horizontal machining centers suffers from positional accuracy changes due to thermal deformation of the spindle box, resulting in inaccurate tool setting and tedious, time-consuming manual tool setting, which affects machining accuracy and efficiency.
A stable, large-scale, high-precision horizontal machining center with an integrated tool setting device is designed, consisting of a support mechanism and a measuring mechanism. The support mechanism is fixed to the spindle box by isolating thermal deformation, and the measuring mechanism is placed on top of the support mechanism. The device uses materials and structures that are insensitive to temperature changes to ensure tool setting accuracy and efficiency.
It effectively solves the problem of the impact of spindle box thermal deformation on the tool setting device, improves machining accuracy and efficiency, simplifies the tool setting process, and reduces the complexity and time cost of manual operation.
Smart Images
Figure CN119609758B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a stable, large-scale, high-precision horizontal machining center with a built-in tool setting device, belonging to the field of machining technology. Background Technology
[0002] With the rapid development of the machinery manufacturing industry, especially the large-scale precision machining industry, the requirements for "industrial mother machines" that process large, high-precision parts are becoming increasingly complex and intelligent. These "industrial mother machines" not only need higher machining accuracy and stability, but also must meet the demands of diversified, small-batch, and multi-variety high-efficiency processing. Therefore, the built-in "tool setting device," which directly affects machining quality, efficiency, and reliability, has become an essential configuration for large, high-precision industrial mother machines. The tool setting device is a crucial component for accurately determining the relative position of the tool and the workpiece, and its structural stability is key to ensuring machining accuracy and improving machining efficiency in industrial mother machines. Previously, the built-in tool setting device of horizontal machining centers was directly or indirectly engaged with the outer surface of the spindle box. During machining, thermal deformation of the spindle box caused changes in the positional accuracy of the tool setting device, leading to frequent inaccuracies in tool setting. Manual tool setting was extremely tedious and time-consuming, severely impacting machining accuracy and efficiency. To solve this problem, there is an urgent need to develop a stable built-in tool setting device for large, high-precision horizontal machining centers. This will play a significant role in improving the machining accuracy of large, high-precision parts, increasing machining efficiency, enhancing machine tool stability, and reducing production costs. Summary of the Invention
[0003] To address the shortcomings of existing technologies, this invention provides a stable, built-in tool setting device for a large-scale, high-precision horizontal machining center. The tool setting device is positioned on the spindle box, parallel to the spindle axis and close to the tool holder. It consists of a support mechanism and a measuring mechanism, with the measuring mechanism resting on the support mechanism. The support mechanism is fixed to the spindle box using techniques and measures to isolate thermal deformation, thereby significantly reducing or even eliminating the impact of spindle box thermal deformation on the measuring mechanism. This effectively solves the problems of inaccurate tool setting due to temperature variations or the cumbersome and time-consuming nature of manual tool setting. It meets the accuracy and efficiency requirements of in-house tool setting in large-scale, high-precision horizontal machining centers and features a simple, precise structure that is easy to install.
[0004] The technical solution adopted by this invention to solve its technical problem is: a stable large-scale high-precision horizontal machining center with a built-in tool setting device, including a specific adjustment method, which consists of a support mechanism and a measuring mechanism. The measuring mechanism is placed in front of the support mechanism, and the support mechanism is connected to the spindle box. The support mechanism consists of a slide plate and a support shaft assembly; the slide plate is set on the side of the spindle box, and two round holes are provided on the upper and lower parts of the slide plate for respectively inserting the upper and lower support shaft assemblies, and the support shaft assembly is connected to the spindle box. The support shaft assembly consists of a nut, a washer, a support shaft, a first end cap, a linear bearing, a expansion sleeve, a lead screw, and a second end cap. The expansion sleeve is installed at the right end of the support shaft, and its outer circumference is connected to the thermal symmetry balance zero point of the spindle box, i.e., the vertical center line of the spindle. The second end cap is installed on the right side of the expansion sleeve and is supported and guided by the support shaft. The lead screw passes through the inside of the support shaft and is connected to the second end cap at the right end of the expansion sleeve and fixed by a saddle screw connection. The left end of the lead screw is fixed to the left shoulder of the support shaft by a nut and a washer. The two support shafts are symmetrically arranged at the upper and lower ends of the horizontal center line of the spindle box. The root of the right end is set on the vertical center line of the thermal symmetry spindle and is consistent with the thermal symmetry balance center controlled by the thermal symmetry key on the base of the spindle box. The left end of the upper support shaft is connected to the spindle box through a linear bearing that can support the linear movement of the support shaft. The left end of the support shaft extends out of the through hole of the spindle box and is equipped with a protective first end cap. The linear bearing of the lower support shaft is fixed in the spindle box through a transition sleeve. The left end of the transition sleeve is connected to the first end cap. The measuring mechanism consists of a reference block, a flat shaft seat, a positioning key, a probe, and an adjusting nut. The reference block is fixed on the horizontal center line of the slide plate. A flat shaft seat is fixed to the slide plate. A positioning key is provided in the through hole at the front end of the flat shaft seat for anti-rotation positioning of the probe connected inside the hole. An adjusting nut is threaded onto the probe, and the adjusting nut connects to the flat shaft seat to adjust the probe's vertical position. The slide plate is a long strip plate insensitive to temperature changes. The support shaft is a long shaft insensitive to temperature changes. Specific adjustment method: Install the reference block on the slide plate. Use a dial indicator and a flat base to control the parallelism of the front plane and side profile of the reference block with the front and side profiles of the slide plate, respectively, with a tolerance not exceeding 0.005mm. After passing the test, tighten the screws and pins. Install the flat shaft seat on the slide plate. Insert a test rod through the probe mounting hole on the flat shaft seat. Adjust the upper generatrix of the test rod to be parallel with the front plane and side profile of the slide plate, respectively, with a tolerance not exceeding 0.005mm. After passing the test, tighten the screws and pins, remove the test rod, and install the probe. 2. Insert the lead screw into the center hole of the support shaft, install the expansion sleeve on the right side of the support shaft, and fit the second end cap onto the round shaft on the right side of the support shaft. The lead screw and the second end cap are connected together by threads and secured with a set screw. Install the lower end transition sleeve of the spindle box, and insert the assembled support shaft into the upper and lower positioning holes of the spindle box. The root of the right end of the support shaft is positioned on the vertical center line of the spindle thermal balance of the spindle box and is aligned with the thermal symmetry balance center controlled by the lower thermal symmetry key.Install the linear bearing on the left end of the support shaft, and install the second end cap for protection at the front end. Control the extension length of the upper and lower support shafts to be the same. Install the slide plate assembly on the upper and lower support shafts. Install the pad and nut on the left end of the support shaft. Tighten the nut to fit the slide plate against the left shoulder of the support shaft. The initial assembly is completed. Then, align the front plane of the slide plate with the side plane of the slide plate with a level. Adjust the verticality tolerance of the slide plate to be no more than 0.01 / 500mm. Rotate the two nuts on the left end of the support shaft symmetrically to rotate the second end cap and move it to the left until the left end of the expansion sleeve is fixed on the right shoulder of the support shaft to tighten the expansion sleeve. This completes the adjustment of the built-in tool setting device.
[0005] The beneficial effects of this invention are: it solves the problem of inaccurate tool setting on machine tools caused by thermal deformation of the spindle box, or the tedious and time-consuming manual tool setting; it can meet the accuracy and efficiency requirements of tool setting in large-scale high-precision horizontal machining centers; and it has a simple and precise structure and is easy to install. It can also be used for the design, installation, and adjustment of other structures with similar thermal deformation effects, possessing practicality, creativity, and convenient and quick operation. Attached Figure Description
[0006] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0007] Figure 1 This is a partial cross-sectional view of the structure of the present invention.
[0008] Figure 2 for Figure 1 A frontal view of the structural diagram.
[0009] Figure 3 for Figure 2 A top-down structural diagram.
[0010] Figure 4 This is a schematic diagram of the measurement mechanism of the present invention installed on the upper busbar.
[0011] Figure 5 This is a schematic diagram of the measurement mechanism of the present invention with the measurement side busbar installed.
[0012] Numbering on the map:
[0013] 1. Nut, 2. Washer plate, 3. Carrying plate, 4. Support shaft, 5. First end cap, 6. Linear bearing.
[0014] 7. Expansion sleeve; 8. Lead screw; 9. Second end cover; 10. Spindle box; 11. Set screw across the seam.
[0015] 12. Reference block; 13. Flat shaft seat; 14. Locating key; 15. Probe; 16. Adjusting nut; 17. Transition sleeve; 18. Thermal symmetry key; 19. Level; 20. Dial indicator; 21. Flat indicator seat; 22. Testing rod; 301. Front plane of the slide; 302. Side plane of the slide.
[0016] 401. Left shoulder of the support shaft; 402. Right shoulder of the support shaft.
[0017] 1001. Horizontal centerline of the spindle; 1002. Vertical centerline of the spindle.
[0018] 1201, front plane of the reference block; 1202, side plane of the reference block. Detailed Implementation
[0019] like Figures 1 to 3As shown, a stable, large-scale, high-precision horizontal machining center has a built-in tool setting device, which consists of a support mechanism and a measuring mechanism. The measuring mechanism is located in front of the support mechanism, which is connected to the spindle box 10. The support mechanism consists of a slide plate 3 and a support shaft assembly. The slide plate 3 is located on the side of the spindle box 10, and has two circular holes at the top and bottom for mounting the upper and lower support shaft assemblies, respectively. The support shaft assembly is connected to the spindle box 10. The support shaft assembly consists of a nut 1, a washer 2, a support shaft 4, a first end cap 5, a linear bearing 6, a shrink sleeve 7, a lead screw 8, and a second end cap 9. The shrink sleeve 7 is installed on the right end of the support shaft 4 and its outer periphery is connected to the thermally symmetrical balance zero point of the spindle box 10, i.e., the vertical center line of the spindle. The second end cap 9 is installed on the right side of the shrink sleeve 7 and is supported and guided by the support shaft 4. The lead screw 8 is inserted into the support shaft 4 and is connected to the second end cap 9 on the right end of the shrink sleeve 7 and fixed by the saddle screw 11. The left end of the lead screw 8 is fixed to the left shoulder 401 of the support shaft by the nut 1 and the washer 2. The two support shafts 4 are symmetrically arranged at the upper and lower ends of the horizontal center line 1001 of the spindle of the spindle box 10. The root of the right end is set on the thermally symmetrical vertical center line 1002 of the spindle and is consistent with the thermally symmetrical balance center controlled by the thermally symmetrical key 18 on the base of the spindle box 10. The upper support shaft 4 is connected to the spindle box 10 at its left end via a linear bearing 6 that supports its linear movement. A protective first end cap 5 extends from the left end of the spindle box 10 through a through hole. The lower support shaft 4's linear bearing 6 is fixed to the spindle box 10 via a transition sleeve 17, with the first end cap 5 connected to the left end of the transition sleeve 17. The measuring mechanism consists of a reference block 12, a flat shaft seat 13, a positioning key 14, a probe 15, and an adjusting nut 16. The reference block 12 is fixed to the horizontal centerline of the slide plate 3. The flat shaft seat 13 is fixed to the slide plate 3. A positioning key 14 is located in the through hole at the front end of the flat shaft seat 13 for anti-rotation positioning of the probe 15 connected within the hole. An adjusting nut 16 is threaded onto the probe 15, connecting to the flat shaft seat 13 to adjust the vertical position of the probe 15. The slide plate 3 is a long strip plate insensitive to temperature changes, made of 4J32 expansion alloy. The support shaft 4 is a long shaft insensitive to temperature changes, and its material is 4J32 expansion alloy. The slide plate 3 has a front plane 301 and a side elevation 302 of a mutually perpendicular measuring reference slide plate, used for aligning and calibrating the dial indicator during installation. The reference block 12 has a front plane 1201 and a side elevation 1202 of a mutually perpendicular measuring reference block, used for aligning and calibrating the dial indicator during installation.
[0020] Specific adjustment methods: I. As Figure 4 , Figure 5As shown, the reference block 12 is installed on the slide plate 3. A dial indicator 20 and a flat base 21 are used to control the parallelism of the front plane 1201 and the side profile 1202 of the reference block with the front plane 301 and the side profile 302 of the slide plate, respectively, with a tolerance not exceeding 0.005mm. After passing the test, the screws and pins are tightened. The flat shaft seat 13 is installed on the slide plate 3. The probe 15 on the flat shaft seat 13 has a probe 22 inserted into its mounting hole. The upper generatrix of the probe 22 is adjusted to be parallel with the front plane 301 and the side profile 302 of the slide plate, respectively, with a tolerance not exceeding 0.005mm. After passing the test, the screws and pins are tightened, the probe 22 is removed, and the probe 15 is installed. II. As... Figure 1 As shown, the lead screw 8 is inserted into the center hole of the support shaft 4, the expansion sleeve 7 is installed on the right side of the support shaft 4, and the second end cap 9 is fitted onto the round shaft on the right side of the support shaft 4. The lead screw 8 and the second end cap 9 are connected together by threads and fixed with the saddle screw 11. Install the transition sleeve 17 at the lower end of the spindle box 10, and insert the assembled support shaft 4 into the upper and lower positioning holes of the spindle box 10. The root of the right end of the support shaft 4 is set on the vertical center line of the spindle thermal balance of the spindle box 10, and is consistent with the thermal symmetry balance center controlled by the lower thermal symmetry key 18. Install the linear bearing 6 on the left end of the support shaft 4, and install the second end cap 9 at the front end for protection, controlling the extension length of the upper and lower support shafts 4 to be the same. Install the slide assembly on the upper and lower support shafts 4, install the pad 2 and nut 1 on the left end of the support shaft 4, and tighten the nut 1 to fit the slide 3 with the left shoulder 401 of the support shaft. The initial assembly is completed. Then, attach the front plane 301 and the side vertical surface 302 of the slide to the level 19 (e.g., Figure 3 (dashed line), adjust the verticality tolerance of the slide plate 3 to be no greater than 0.01 / 500mm, symmetrically rotate the two nuts 1 at the left end of the support shaft 4 to rotate the second end cover 9 and move it to the left until the left end of the expansion sleeve is fixed on the right shoulder 402 of the support shaft to tighten the expansion sleeve 7, and complete the adjustment of the built-in tool setting device.
[0021] Working Principle: By combining the application of thermal symmetry equilibrium zero point and material properties, the influence of thermal deformation caused by temperature changes in the spindle box bearing the device on the positional accuracy of the tool setting device is effectively isolated and reduced. Specifically, when the spindle box 10 deforms due to heat, the position of the thermal symmetry equilibrium zero point, i.e., the vertical center line of the spindle, remains unchanged due to the constraint of the thermal symmetry key 18. Since the root of the support shaft 4 is tensioned at the thermal symmetry equilibrium zero point, i.e., the vertical center line of the spindle, and the support shaft 4 is not sensitive to temperature changes, its position and accuracy will not change. At this time, only the lead screw 8 at the center of the support shaft will extend and retract to the left with the tensioned position of the right end expansion sleeve 7 as the base point, which will not affect the position and accuracy of the slide 3, ensuring the stability and reliability of the tool setting device itself, thereby guaranteeing the accuracy of the machine tool tool setting.
Claims
1. A stable, large-scale, high-precision horizontal machining center with a built-in tool setting device, comprising a support mechanism and a measuring mechanism, characterized in that: The measuring mechanism is placed in front of the support mechanism, which is connected to the spindle box (10). The support mechanism consists of a slide plate (3) and a support shaft assembly. The slide plate (3) is located on the side of the spindle box (10), and two round holes are provided on the upper and lower parts of the slide plate (3) for mounting the upper and lower support shaft assemblies respectively. The support shaft assembly is connected to the spindle box (10). The support shaft assembly consists of a nut (1), a washer (2), a support shaft (4), a first end cap (5), a linear bearing (6), a tension sleeve (7), a lead screw (8), and a second end cap (9). The tension sleeve (7) is installed on the right end of the support shaft (4). The outer periphery is connected to the thermally symmetrical balance zero point of the spindle box (10), i.e., the vertical center line of the spindle. The second end cover (9) is installed on the right side of the expansion sleeve (7) and supported and guided by the support shaft (4). The lead screw (8) is inserted into the support shaft (4) and connected to the second end cover (9) at the right end of the expansion sleeve (7) and fixed by the saddle screw (11). The left end of the lead screw (8) is fixed to the left shoulder (401) of the support shaft by the nut (1) and the washer (2). The two support shafts (4) are symmetrically arranged at the upper and lower ends of the horizontal center line (1001) of the spindle of the spindle box (10). The right end The root is set on the vertical center line (1002) of the thermally symmetrical spindle and is consistent with the thermally symmetrical balance center controlled by the thermally symmetrical key (18) on the base of the spindle box (10). The left end of the upper support shaft (4) is connected to the spindle box (10) through a linear bearing (6) that can support the linear movement of the support shaft (4) back and forth. The left end of the support shaft (4) extends out of the through hole of the spindle box (10) and is provided with a protective first end cover (5). The linear bearing (6) of the lower support shaft (4) is fixed in the spindle box (10) through a transition sleeve (17). The left end of the transition sleeve (17) is connected to the first end. Cover (5); The measuring mechanism consists of a reference block (12), a flat shaft seat (13), a positioning key (14), a probe (15), and an adjusting nut (16). The reference block (12) is fixed on the horizontal center line of the slide plate (3), and the flat shaft seat (13) is fixed on the slide plate (3). The front end of the flat shaft seat (13) is provided with a positioning key (14) for anti-rotation positioning of the probe (15) connected in the hole. The probe (15) is connected to the adjusting nut (16) by a thread. The adjusting nut (16) is connected to the flat shaft seat (13) to adjust the up and down position of the probe (15).
2. The stable large-scale high-precision horizontal machining center with built-in tool setting device according to claim 1, wherein the slide (3) is a long strip plate that is not sensitive to temperature changes.
3. The stable large-scale high-precision horizontal machining center with built-in tool setting device according to claim 1, wherein the support shaft (4) is a long shaft that is not sensitive to temperature changes.
4. A method for adjusting the built-in tool setting device according to claim 1, characterized in that: Specific adjustment method:
1. Install the reference block (12) on the slide plate (3). Use a dial indicator (20) and a flat base (21) to control the front plane (1201) and the side elevation (1202) of the reference block to be parallel to the front (301) and the side elevation (302) of the slide plate, respectively. The allowable tolerance is no more than 0.005mm. After passing the test, tighten the screws and pins. Install the flat shaft seat (13) on the slide plate (3). Insert the probe (15) on the flat shaft seat (13) into the mounting hole of the probe (15) and insert the test rod (22). Adjust the upper generatrix of the test rod (22). The allowable tolerance for parallelism with the front plane (301) and the side elevation (302) of the slide plate is no more than 0.005mm. After passing the test, tighten the screws and pins, remove the test bar (22), and install the probe (15). Second, insert the lead screw (8) into the center hole of the support shaft (4), install the expansion sleeve (7) on the right side of the support shaft (4), and fit the second end cover (9) on the round shaft on the right side of the support shaft (4). The lead screw (8) and the second end cover (9) are connected together by threads and fixed with the saddle screw (11). Install the transition sleeve (1) at the lower end of the spindle box (10). 7) Insert the assembled support shaft (4) into the upper and lower positioning holes of the spindle box (10). The root of the right end of the support shaft (4) is set on the vertical center line of the spindle thermal balance of the spindle box (10) and is consistent with the thermal symmetry balance center controlled by the lower thermal symmetry key (18). Install the linear bearing (6) on the left end of the support shaft (4). Install the second end cover (9) on the front end for protection. Control the extension length of the upper and lower support shafts (4) to be the same. Install the slide plate assembly on the upper and lower support shafts (4). Install the pad (2) and nut (1) on the support shaft (4). On the left end, tighten the nut (1) to fit the slide plate (3) with the left shoulder (401) of the support shaft. The initial assembly is completed. Then, fit the front plane (301) and the side surface (302) of the slide plate with the level (19) respectively. Adjust the verticality tolerance of the slide plate (3) to be no more than 0.01 / 500mm. Rotate the two nuts (1) on the left end of the support shaft (4) symmetrically to make the second end cover (9) rotate and move to the left until the left end of the expansion sleeve (7) is fixed on the right shoulder (402) of the support shaft to tighten the expansion sleeve (7). The adjustment of the built-in tool setting device is completed.