Stable large-scale high-precision horizontal machining center built-in tool setting device

Abstract

The invention discloses a stable built-in tool setting device of a large-scale high-precision horizontal machining center. The stable built-in tool setting device is composed of a supporting mechanism and a measuring mechanism. The measuring mechanism is arranged in front of the supporting mechanism which is connected with the spindle box. The supporting mechanism is composed of a dragging plate and a supporting shaft assembly. The measuring mechanism is composed of a reference block, a base with a flat shaft, a positioning key, a measuring head and an adjusting nut, the reference block is fixed to the horizontal center line of the carriage, the base with the flat shaft is fixed to the carriage, the positioning key is arranged in a through hole in the front end of the base with the flat shaft and used for anti-rotation positioning of the measuring head connected in the hole, and the adjusting nut is connected to the upper face of the measuring head through threads. The adjusting nut is connected with the flat shaft seat to adjust the vertical position of the measuring head. The problems that tool setting of a machine tool is not accurate due to thermal deformation of the spindle box or manual tool setting is tedious and time-consuming are solved, the requirements for precision and efficiency of tool setting in a large-scale high-precision horizontal machining machine can be met, the structure is simple and accurate, and installation is convenient. The method has the characteristics of practicability, creativity, convenient and fast operation and the like.

Description

Technical Field

[0001] The invention relates to a stable large-scale high-precision horizontal machining center built-in tool setting device, belonging to the technical field of mechanical machining. Background Art

[0002] With the rapid development of the machinery manufacturing industry, especially the large-scale precision machining industry, the requirements for "industrial mother machines" for processing large high-precision parts are becoming increasingly complex and intelligent. "Industrial mother machines" not only need to have higher processing accuracy and stability, but also meet the requirements of diversified, small batch, multi-variety and high-efficiency processing. For this reason, the built-in "tool setting device" that directly affects the processing quality, efficiency and reliability has become a necessary configuration for large high-precision industrial mother machines. The tool setting device is an important component for accurately measuring the relative position of the tool and the workpiece. Its structural stability is the key to ensuring the processing accuracy and improving the processing efficiency of the industrial mother machine. In the past, the built-in tool setting device of the horizontal machining center was directly or indirectly attached to the outer surface of the spindle box. During processing, the spindle box produced thermal deformation, which changed the position accuracy of the tool setting device, resulting in frequent inaccurate tool setting. Manual tool setting is very cumbersome and time-consuming, which seriously affects the processing accuracy and efficiency. In order to solve this problem, it is urgent to develop a stable built-in tool setting device for large high-precision horizontal machining centers, which has important functions and significance in improving the processing accuracy of large high-precision parts, improving processing efficiency, enhancing machine tool stability, and reducing production costs. Summary of the invention

[0003] In order to solve the deficiencies in the above-mentioned prior art, the present invention provides a stable large-scale high-precision horizontal machining center with built-in tool setting device. The tool setting device is placed on the side of the spindle box parallel to the spindle axis and close to the tool holder. The tool setting device consists of a supporting mechanism and a measuring mechanism. The measuring mechanism is placed on the supporting mechanism, and the supporting mechanism is fixed on the spindle box by adopting technical means and measures of isolating thermal deformation, thereby greatly reducing or even eliminating the influence of thermal deformation of the spindle box on the measuring mechanism, and can effectively solve the problem of inaccurate tool setting of machine tools affected by temperature changes or cumbersome and time-consuming manual tool setting, and can meet the accuracy and efficiency requirements of tool setting in large-scale high-precision horizontal machining centers, and has a simple and accurate structure and is easy to install.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a stable large-scale high-precision horizontal machining center built-in tool setting device, which also includes a specific adjustment method, and is composed 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 is composed of a carriage and a support shaft assembly; the carriage is arranged on the side of the spindle box, and two circular holes are arranged on the upper and lower parts of the carriage for respectively passing through the upper and lower support shaft assemblies, and the support shaft assembly is connected to the spindle box. The support shaft assembly is composed of a nut, a pad, a support shaft, an end cover, a linear bearing, a sleeve, a screw, and an end cover. The expansion sleeve is installed on the right end of the support shaft, and the outer periphery is connected to the thermal symmetric balance zero point of the spindle box, that is, the vertical center line of the spindle. The end cover is installed on the right side of the expansion sleeve and supported and guided by the support shaft. The screw rod is installed inside the support shaft, connected to the end cover at the right end of the expansion sleeve and fixed by the saddle screw. The left end of the screw rod fixes the drag plate to the left shoulder of the support shaft through a nut and a pad. The two support shafts are symmetrically arranged at the upper and lower ends of the horizontal center line of the spindle of the spindle box. The right end root is set on the vertical center line of the thermal symmetric spindle and is consistent with the thermal symmetric balance center controlled by the thermal symmetric key on the spindle box base. The left end of the upper support shaft is connected to the spindle box through a linear bearing that can support the linear motion of the support shaft forward and backward. The left end of the support shaft extends out of the through hole of the spindle box and is provided with a protective end cover. The linear bearing of the lower support shaft is fixed in the spindle box through a transition sleeve, and the end cover is connected to the left end hole of the transition sleeve. The measuring mechanism is composed of a reference block, a flat shaft seat, a positioning key, a probe, and an adjustment nut. The reference block is fixed on the horizontal center line of the carriage, and the flat shaft seat is fixed on the carriage. A positioning key is provided in the front through hole of the flat shaft seat for anti-rotation positioning of the probe connected in the hole. An adjusting nut is connected to the probe through a thread, and the adjusting nut is connected to the flat shaft seat for adjusting the upper and lower positions of the probe. The carriage is a long strip plate that is insensitive to temperature changes. The support shaft is a long shaft that is insensitive to temperature changes. Specific adjustment method: install the reference block on the carriage, use a micrometer and a flat gauge seat to control the front plane of the reference block and the side elevation of the reference block to be parallel to the front and side of the carriage respectively, with an allowable error of no more than 0.005mm, and tighten with screws and pins after passing. Install the flat shaft seat on the carriage, insert a detection rod into the probe mounting hole on the flat shaft seat, adjust the upper side busbar of the detection rod to be parallel to the front plane of the carriage and the side elevation of the carriage respectively, with an allowable error of no more than 0.005mm, and tighten with screws and pins after passing, withdraw the detection rod, and install the probe. 2. Install the screw rod in the center hole of the support shaft, install the expansion sleeve on the right side of the support shaft, and put the end cover on the round shaft on the right side of the support shaft. The screw rod and the end cover are connected together by threads and fixed with saddle screws. Install the transition sleeve at the lower end of the spindle box, and install the assembled support shaft in the upper and lower positioning holes of the spindle box. The root of the right end of the support shaft is set on the vertical center line of the spindle thermal balance of the spindle box, and is consistent with the thermal symmetry balance center controlled by the thermal symmetry key at the lower end.Install the linear bearing on the left end of the support shaft, close the end cover protection at the front end, control the upper and lower support shafts to extend to the same length, install the slide 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 with the left shoulder of the support shaft, and the preliminary assembly is completed. Then fit the front plane of the slide and the side elevation of the slide respectively on the level meter, adjust the verticality tolerance of the slide to no more than 0.01 / 500mm, symmetrically rotate the nut on the left end of the support shaft to rotate the end cover and move it to the left until the left end of the expansion sleeve is fixed on the right shoulder of the support sleeve to tighten the expansion sleeve, and complete the adjustment of the built-in tool setting device.

[0005] The invention has the beneficial effects of solving the problem of inaccurate tool setting of machine tools due to thermal deformation of the spindle box, or the problem of cumbersome and time-consuming manual tool setting, and can meet the accuracy and efficiency requirements of tool setting in large-scale high-precision horizontal machining centers, and has a simple and accurate structure and is easy to install. It can also be used for the design, installation and adjustment of other structures with the same or similar thermal deformation, and has the characteristics of practicality, creativity, and convenient and quick operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0007] Figure 1 It is a schematic diagram of the structure of the present invention after partial section.

[0008] Figure 2 for Figure 1 A schematic diagram of the structure from the front.

[0009] Figure 3 for Figure 2 Schematic diagram of the structure from a top view.

[0010] Figure 4 This is a schematic diagram of installing the measuring mechanism of the present invention to measure the upper busbar.

[0011] Figure 5 Schematic diagram of the measurement side busbar installed in the measurement mechanism of the present invention.

[0012] Numbers in the figure: 1. Nut, 2. Pad, 3. Drag plate, 4. Support shaft, 5. Cover plate, 6. Linear bearing, 7. Expanding sleeve, 8. Screw rod, 9. End cover, 10. Spindle box, 11. Saddle screw, 12. Reference block, 13. Flat shaft seat, 14. Positioning key, 15. Probe, 16. Adjusting nut, 17. Transition sleeve, 18. Thermal symmetry key, 19. Level, 20. Micrometer, 21. Flat seat, 22. Detection rod, 301. Front plane of the carriage, 302. Side plane of the carriage, 401, left shoulder of the support shaft, 402, right shoulder of the support shaft, 1001, horizontal centerline of the spindle, 1002, vertical centerline of the spindle, 1201. The front plane of the reference block. 1202. The side plane of the reference block. DETAILED DESCRIPTION

[0013] like Figures 1 to 3 As shown, a stable large-scale high-precision horizontal machining center built-in tool setting device is composed 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 10. The support mechanism is composed of a carriage 3 and a support shaft assembly. The carriage 3 is arranged on the side of the spindle box 10. The carriage 3 is provided with two circular holes on the upper and lower sides for respectively passing through the upper and lower support shaft assemblies, and the support shaft assembly is connected to the spindle box 10. The support shaft assembly is composed of a nut 1, a pad 2, a support shaft 4, an end cover 5, a linear bearing 6, a sleeve 7, a screw 8, and an end cover 9. The sleeve 7 is installed on the right end of the support shaft 4, and the outer periphery is connected to the thermally symmetrical balance zero point of the spindle box 10, that is, the vertical center line of the spindle. The end cover 9 is installed on the right side of the sleeve 7 and supported and guided by the support shaft 4. The screw 8 is passed through the inside of the support shaft 4, connected to the end cover 9 at the right end of the sleeve 7 and fixed by a saddle screw 11. The left end of the screw 8 fixes the slide plate 3 to the left shoulder 401 of the support shaft through the nut 1 and the pad 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, and the root of the right end 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 motion of the support shaft 4 forward and backward. 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 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 end cover 5 is connected to the left end hole of the transition sleeve 17. The measuring mechanism is composed 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 carriage 3. The flat shaft seat 13 is fixed on the carriage 3. The positioning key 14 is provided in the front through hole of the flat shaft seat 13 for anti-rotation positioning of the probe 15 connected in the hole. The probe 15 is connected with an adjusting nut 16 by threading. The adjusting nut 16 is connected to the flat shaft seat 13 for adjusting the up and down position of the probe 15. The carriage 3 is a long strip plate that is insensitive to temperature changes, and the material is 4j32 expansion alloy. The support shaft 4 is a long shaft that is insensitive to temperature changes, and the material is 4j32 expansion alloy. The carriage 3 is provided with a front plane 301 of the measuring reference carriage and a side elevation 302 of the carriage, which are perpendicular to each other, for alignment and calibration of the pull gauge during installation. The reference block 12 is provided with a front plane 1201 of the measuring reference block and a side elevation 1202 of the reference block, which are perpendicular to each other, for alignment and calibration of the pull gauge during installation.

[0014] Specific adjustment methods: 1. Figure 4 , Figure 5 As shown, install the reference block 12 on the carriage 3, use the micrometer 20 and the flat gauge seat 21 to control the front plane 1201 of the reference block and the side elevation 1202 of the reference block to be parallel to the front 301 and the side 302 of the carriage respectively, with a tolerance of no more than 0.005mm. After passing the test, tighten with screws and pins. Install the flat shaft seat 13 on the carriage 3, insert the detection rod 22 into the mounting hole of the probe 15 on the flat shaft seat 13, adjust the upper side busbar of the detection rod 22 to be parallel to the front plane 301 and the side elevation 302 of the carriage respectively, with a tolerance of no more than 0.005mm. After passing the test, tighten with screws and pins, remove the detection rod 22, and install the probe 15. 2. Figure 1 As shown, the screw rod 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, the end cover 9 is sleeved on the right circular shaft of the support shaft 4, the screw rod 8 and the end cover 9 are connected together by threads and fixed with a 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 thermal balance of the spindle of the spindle box 10, and is consistent with the thermal symmetry balance center controlled by the thermal symmetry key 18 at the lower end. Install the linear bearing 6 on the left end of the support shaft 4, and close the end cover 9 at the front end for protection, control the upper and lower support shafts 4 to have the same extension length, install the slide assembly on the upper and lower support shafts 4, install the pad 2 and the nut 1 on the left end of the support shaft 4, tighten the nut 1 to fit the slide 3 with the left shoulder 401 of the support shaft, and the preliminary assembly is completed. Then fit the front plane 301 of the slide and the side elevation 302 of the slide respectively with the level 17 (as shown in Figure 3 Dotted line), adjust the verticality tolerance of the carriage 3 to no more than 0.01 / 500mm, symmetrically rotate the nut 1 at the left end of the support shaft 4 to rotate the 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 sleeve to tighten the expansion sleeve 7, and complete the adjustment of the built-in tool setting device.

[0015] Working principle: Through the combined use of the thermal symmetric balance zero point and material properties, the influence of thermal deformation caused by the temperature change of the spindle box carrying the device on the position accuracy of the tool setting device can be effectively isolated and reduced. Specifically: when the spindle box 10 is deformed by heat, the thermal symmetric balance zero point, i.e., the position of the vertical center line of the spindle, will not change due to the constraint of the thermal symmetry key 18. Since the root of the support shaft 4 is tightened at the thermal symmetric balance zero point, i.e., the vertical center line of the spindle, and the support shaft 4 is insensitive to temperature changes, its position and accuracy will not change. At this time, only the screw rod 8 in the center of the support shaft will extend and contract to the left with the tightening position of the right end expansion sleeve 7 as the base point, which will not affect the position and accuracy of the slide plate 3, thereby ensuring the stability and reliability of the accuracy of the tool setting device itself, and thus ensuring the accuracy of the machine tool tool setting.

Claims

1. A stable large-scale high-precision horizontal machining center built-in tool setting device, consisting of a support mechanism and a measuring mechanism, characterized in that: The measuring mechanism is placed in front of the supporting mechanism, and the supporting mechanism is connected to the spindle box (10); the supporting mechanism is composed of a carriage (3) and a supporting shaft assembly; the carriage (3) is arranged on the side of the spindle box (10), and two circular holes are arranged on the upper and lower parts of the carriage (3) for respectively passing through the upper and lower supporting shaft assemblies, and the supporting shaft assembly is connected to the spindle box (10); the supporting shaft assembly is composed of a nut (1), a pad (2), a supporting shaft (4), an end cover (5), a linear bearing (6), an expansion sleeve (7), a screw rod (8), and an end cover (9); the expansion sleeve (7) is installed on the right end of the supporting shaft (4), and the outer The circumference of the main shaft box (10) is connected to the thermal symmetrical balance zero point, that is, the vertical center line of the main shaft. The end cover (9) is installed on the right side of the expansion sleeve (7) and is supported and guided by the support shaft (4). The screw rod (8) is installed inside the support shaft (4) and is connected to the end cover (9) at the right end of the expansion sleeve (7) and is connected and fixed by a saddle screw (11). The left end of the screw rod (8) fixes the carriage (3) on the left shoulder (401) of the support shaft through a nut (1) and a pad (2). The two support shafts (4) are symmetrically arranged at the upper and lower ends of the horizontal center line (1001) of the main shaft of the main shaft box (10). The root of the right end is The support shaft (4) is arranged on the vertical center line (1002) of the thermal symmetry spindle and is consistent with the thermal symmetry balance center controlled by the thermal symmetry 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 support shaft (4) to move forward and backward in a straight line. 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 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 end cover (5) is connected to the outside of the left end hole of the transition sleeve (17). ); the measuring mechanism is composed 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 carriage (3); the flat shaft seat (13) is fixed on the carriage (3); a positioning key (14) is provided in the front end through hole of the flat shaft seat (13) for anti-rotation positioning of the probe (15) connected in the hole; an adjusting nut (16) is connected to the probe (15) through a thread; the adjusting nut (16) is connected to the flat shaft seat (13) for adjusting the upper and lower positions of the probe (15).

2. According to the stable large-scale high-precision horizontal machining center built-in tool setting device described in claim 1, the carriage (3) is a long strip plate that is insensitive to temperature changes.

3. According to the stable large-scale high-precision horizontal machining center built-in tool setting device described in claim 1, the support shaft (4) is a long shaft that is insensitive to temperature changes.

4. A stable large-scale high-precision horizontal machining center built-in tool setting device, characterized by: Specific adjustment method:

1. Install the reference block (12) on the carriage (3), use the micrometer (20) and the flat gauge seat (21) to control the front plane (1201) of the reference block and the side elevation (1202) of the reference block to be parallel to the front face (301) of the carriage and the side elevation (302) of the carriage respectively, with a tolerance of no more than 0.005mm. After passing the test, tighten the screws and pins, install the flat shaft seat (13) on the carriage (3), insert the detection rod (22) into the mounting hole of the probe (15) on the flat shaft seat (13), and adjust the detection rod (22) The side busbar is parallel to the front plane (301) of the carriage and the side elevation (302) of the carriage respectively, and the tolerance is not greater than 0.005mm. After passing the test, the screws and pins are tightened, the detection rod (22) is withdrawn, and the probe (15) is installed; second, the screw rod (8) is inserted into the central hole of the support shaft (4), the expansion sleeve (7) is installed on the right side of the support shaft (4), the end cover (9) is sleeved on the right side of the support shaft (4), the screw rod (8) and the end cover (9) are connected together by threads, fixed with the saddle screw (11), and the lower end transition sleeve (15) of the main shaft box (10) is installed. 17), install 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 thermal symmetry key (18) at the lower end, install the linear bearing (6) on the left end of the support shaft (4), close the end cover (9) at the front end for protection, control the upper and lower support shafts (4) to have the same extension length, install the carriage assembly on the upper and lower support shafts (4), install the pad (2) and the nut (1) on the support shaft ( 4) At the left end, tighten the nut (1) to fit the carriage (3) with the left shoulder (401) of the support shaft. The preliminary assembly is completed. Then, fit the front plane (301) of the carriage and the side elevation (302) of the carriage respectively with the level gauge (17). Adjust the verticality of the carriage (3) to a tolerance of no more than 0.01 / 500mm. Rotate the nut (1) at the left end of the support shaft (4) symmetrically to rotate the end cover (9) and move it to the left until the left end of the expansion sleeve (7) is fixed on the right shoulder (402) of the support sleeve to tighten the expansion sleeve (7). This completes the adjustment and installation of the built-in tool setting device.

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