Curve follow-up machine tool

Abstract

The invention relates to a curve follow-up machine tool, and belongs to the field of machine tools. The machine head comprises a machine head frame base, a self-aligning bearing, a hollow shaft, a balance arm device, a hoop device, a speed reduction motor lathe bed and a sliding saddle, the hollow shaft is installed on the machine head frame base through the self-aligning bearing, a speed reduction motor is installed at one end of the hollow shaft, and the sliding saddle is installed on the lathe bed. The device is structurally characterized by further comprising a swing angle device, a fan-shaped table device and a machine head device, the swing angle device is installed on the gear motor, the machine head device is installed at the other end of the hollow shaft, the machine head frame base is installed on the fan-shaped table device, the fan-shaped table device is installed on the sliding saddle, and the sliding saddle is installed on the machine head frame base. The hollow shaft is sleeved with the balance arm device and the hoop device, the balance arm device is connected with the machine head frame base, and the hoop device is installed on the machine head frame base.

Description

Technical Field

[0001] The present invention relates to a curve follower machine tool, belonging to the field of machine tools. Background Art

[0002] A milling machine mainly refers to a machine tool that processes various surfaces of a workpiece with a milling cutter. Usually, the rotational movement of the milling cutter is the main movement, and the movement of the workpiece and the milling cutter is the feed movement; a grinding machine is a machine tool that grinds the surface of a workpiece with a grinding tool. Most grinding machines use a high-speed rotating grinding wheel for grinding.

[0003] The tool is installed on the headstock assembly. When the tool is a grinding wheel, the machine tool is a grinding machine. When the tool is a milling cutter head, the machine tool is a milling machine. When using a grinding machine or a milling machine to process a workpiece, it is necessary to realize the sector movement of the headstock assembly and the linear movement in two perpendicular directions. At the same time, it is also necessary to realize the angle and position adjustment of the headstock assembly so that the workpiece can be processed by the tool. In the prior art, when realizing the sector movement, the frictional force is large and it is easy to get stuck. After adjusting the angle and position of the headstock assembly, its position cannot be fixed, resulting in poor stability of the headstock assembly during operation. Due to structural limitations in the prior art, the coordination of actions in each dimension is not good. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies existing in the prior art, and to provide a curve follower machine tool with a reasonable structural design.

[0005] The technical solution adopted by the present invention to solve the above problems is: the curve follower machine tool includes a headstock seat, a self-aligning bearing, a hollow shaft, a reduction motor bed and a saddle. The hollow shaft is installed on the headstock seat through the self-aligning bearing. The reduction motor is installed at one end of the hollow shaft. The saddle is installed on the bed. Its structural feature is that it further includes a swing angle device, a sector table device and a headstock device. The swing angle device is installed on the reduction motor. The headstock device is installed at the other end of the hollow shaft. The headstock seat is installed on the sector table device. The sector table device is installed on the saddle.

[0006] Furthermore, the curve follower machine tool further includes a balance arm device. The balance arm device is sleeved outside the hollow shaft and is connected to the headstock seat. The balance arm device includes a balance arm and a tension spring. The balance arm is sleeved and fixed outside the hollow shaft. One end of the tension spring is connected to the balance arm, and the other end of the tension spring is connected to the headstock seat.

[0007] Furthermore, the curve-driven machine tool further includes a hoop device, which is sleeved outside the hollow shaft and installed on the headstock seat; the hoop device includes a tightening screw, a hoop body, a locking buckle and a locking oil cylinder. The tightening screw is installed on the headstock seat, the hoop body is sleeved outside the hollow shaft, the lower end of the hoop body contacts the tightening screw, and the upper end of the hoop body is locked by the locking buckle and the locking oil cylinder.

[0008] Furthermore, the locking buckle is arranged in a U-shaped structure, and a circular hole and a waist-shaped hole are arranged on the locking buckle. A locking pin shaft is installed at the upper end of each of the two hoop bodies, and the two locking pin shafts are respectively located in the circular hole and the waist-shaped hole. The cylinder barrel of the locking oil cylinder is installed in the locking buckle, and the piston rod of the locking oil cylinder abuts against the locking pin shaft located in the waist-shaped hole. An arc-shaped convex structure is arranged on the hoop body, and this arc-shaped convex structure contacts the tightening screw.

[0009] Furthermore, the swing angle device includes a swing angle seat and a swing angle driving mechanism. The swing angle seat is installed on the reduction motor, and the swing angle driving mechanism is matched with the swing angle seat; a swing angle seat cavity is arranged on the swing angle seat. The swing angle driving mechanism includes a swing angle driving motor, a swing angle driving belt pulley, an eccentric shaft and a swing angle driving slider. The swing angle driving belt pulley and the swing angle driving slider are both installed on the eccentric shaft. The swing angle driving slider is located in the swing angle seat cavity. The swing angle driving belt pulley is in belt transmission with the swing angle driving motor, and the swing angle driving motor and the eccentric shaft are both installed on the headstock seat.

[0010] Furthermore, the swing angle device further includes a swing angle positioning mechanism, which is installed on the swing angle seat and is located below the swing angle seat cavity; the swing angle positioning mechanism includes a swing angle positioning bottom plate, a swing angle positioning oil cylinder and a swing angle positioning top plate. The swing angle positioning bottom plate is installed on the swing angle seat and is located below the swing angle seat cavity. The cylinder barrel of the swing angle positioning oil cylinder is installed on the swing angle positioning bottom plate. The piston rod of the swing angle positioning oil cylinder is connected to the swing angle positioning top plate, and the swing angle positioning top plate is matched with the swing angle driving slider.

[0011] Furthermore, the sector table device includes a sector table, an oil sump pressing plate, a hydrostatic driving mechanism and a sector rotary center shaft. The headstock seat is installed on the sector table through the sector rotary center shaft, and the headstock seat is driven by the hydrostatic driving mechanism to perform a sector movement along the sector rotary center shaft. The oil sump pressing plate is installed at the bottom of the headstock seat, and the oil sump pressing plate is matched with the sector table.

[0012] Further, an oil storage partition strip in a ring structure is provided on the lower side of the oil storage pressing plate. The inner side of the oil storage partition strip is an oil injection chamber, and the outer side of the oil storage partition strip is an oil return groove. An oil injection hole is provided on the oil storage pressing plate, and the oil injection hole communicates with the oil injection chamber. An oil discharge hole is provided on the sector table, and the oil discharge hole communicates with the oil return groove.

[0013] Further, the hydrostatic driving mechanism includes a hydrostatic driving motor, a hydrostatic driving synchronous pulley, a hydrostatic driving synchronous belt, hydrostatic guide pulleys, hydrostatic limit pulleys, and a hydrostatic limit frame. The hydrostatic limit frame is installed on the headstock seat, the hydrostatic limit pulleys are installed on the hydrostatic limit frame, and the hydrostatic limit pulleys are in contact with the sector table.

[0014] Further, both the hydrostatic driving motor and the hydrostatic guide pulleys are installed on the headstock seat. The hydrostatic driving synchronous pulley is installed on the motor shaft of the hydrostatic driving motor. Both ends of the hydrostatic driving synchronous belt are installed at both ends of the sector table, and the hydrostatic driving synchronous pulley is in cooperation with the inner side of the hydrostatic driving synchronous belt, and the hydrostatic guide pulleys are in cooperation with the outer side of the hydrostatic driving synchronous belt.

[0015] Further, the number of the hydrostatic guide pulleys is two, both of the two hydrostatic guide pulleys are in contact with the outer side of the hydrostatic driving synchronous belt, the number of the hydrostatic driving synchronous pulleys is one, one hydrostatic driving synchronous pulley is meshed with the inner side of the hydrostatic driving synchronous belt, and the two hydrostatic guide pulleys and the one hydrostatic driving synchronous pulley are arranged in a triangular structure.

[0016] Further, the headstock device includes a headstock adjusting seat, an electric spindle, a cutter, an electric spindle clamp, a compensation mechanism, and a clamp positioning oil cylinder. The headstock adjusting seat is installed at the other end of the hollow shaft. The cutter is installed on the electric spindle. The electric spindle is installed on the electric spindle clamp. Both the electric spindle clamp and the compensation mechanism are installed on the headstock adjusting seat, and the electric spindle clamp is connected to the compensation mechanism. The electric spindle clamp is positioned by the clamp positioning oil cylinder.

[0017] Further, a preset offset angle α exists on the headstock adjusting seat, and the value range of the preset offset angle α is 0 - 30°.

[0018] Further, the electric spindle clamp includes a first clamp and a second clamp. The first clamp is connected to the second clamp. The compensation mechanism is installed on the second clamp. The cylinder barrel of the clamp positioning oil cylinder is installed on the headstock adjusting seat. The piston rod of the clamp positioning oil cylinder is in contact with the upper wedge, the upper wedge is in contact with the upper side of the second clamp, the lower side of the second clamp is in contact with the lower wedge, and the lower wedge is in contact with the headstock adjusting seat.

[0019] Furthermore, the compensation mechanism includes a compensation motor, a coupling, a ball screw, and a nut seat. The compensation motor is installed on the headstock seat. The motor shaft of the compensation motor is connected to the coupling. The coupling is connected to the ball screw. The ball screw penetrates through and is threadedly connected to the nut seat. The nut seat is connected to the second hoop.

[0020] Compared with the prior art, the present invention has the following advantages: The curve follower machine tool can enable the saddle to move along the lower guide rail by setting the lower guide rail, enable the sector table device to move along the upper guide rail by setting the upper guide rail, drive the headstock seat to perform a sector motion along the sector rotation center axis through the hydrostatic drive mechanism, realize the adjustment of the rotation angle of the headstock device by driving the hollow shaft to rotate through the reduction motor, and realize the adjustment of the upper and lower positions of the headstock device by driving the hollow shaft to swing up and down through the swing angle device provided, so as to realize the multi-dimensional adjustment of the headstock device; Keep the hollow shaft balanced by setting the balance arm, and fix the position of the hollow shaft through the hoop device provided to ensure the stability of the operation of the headstock assembly.

[0021] The sector table device realizes a sector motion relative to the sector through the oil sump pressing plate and the headstock seat. When performing the sector motion, a hydrostatic oil film is formed between the oil sump pressing plate and the sector, which can reduce the friction force and avoid jamming during the sector motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view structural schematic diagram of the curve follower machine tool according to the embodiment of the present invention.

[0023] Figure 2 is the left view structural schematic diagram of the curve follower machine tool according to the embodiment of the present invention.

[0024] Figure 3 is the front view structural schematic diagram of the headstock assembly according to the embodiment of the present invention.

[0025] Figure 4 is the left view structural schematic diagram of the headstock assembly according to the embodiment of the present invention.

[0026] Figure 5 is the left view structural schematic diagram of the balance arm device according to the embodiment of the present invention.

[0027] Figure 6 is the left view structural schematic diagram of the hoop device according to the embodiment of the present invention.

[0028] Figure 7 is the left view structural schematic diagram of the locking buckle according to the embodiment of the present invention.

[0029] Figure 8 is the top view structural schematic diagram of the locking buckle according to the embodiment of the present invention.

[0030] Figure 9 It is a left - view structural schematic diagram of the swing - angle device according to an embodiment of the present invention.

[0031] Figure 10 It is a top - view structural schematic diagram of the swing - angle driving mechanism according to an embodiment of the present invention.

[0032] Figure 11 It is a left - view structural schematic diagram of the nose - frame assembly according to an embodiment of the present invention.

[0033] Figure 12 It is a top - view structural schematic diagram of the sector - table device according to an embodiment of the present invention.

[0034] Figure 13 It is a top - view structural schematic diagram of the oil - tank pressing plate according to an embodiment of the present invention.

[0035] Figure 14 It is a left - view structural schematic diagram of the oil - tank pressing plate according to an embodiment of the present invention.

[0036] Figure 15 It is a top - view structural schematic diagram of the sector - table device according to an embodiment of the present invention.

[0037] Figure 16 It is a front - view structural schematic diagram of the sector - table device according to an embodiment of the present invention.

[0038] Figure 17 It is a front - view structural schematic diagram of the nose device according to an embodiment of the present invention.

[0039] Figure 18 It is a left - view structural schematic diagram of the nose device according to an embodiment of the present invention.

[0040] Figure 19 It is a front - view structural schematic diagram of the nose device according to an embodiment of the present invention.

[0041] In the figure: nose - frame seat 1, self - aligning bearing 2, hollow shaft 3, balance - arm device 4, hoop device 5, reduction motor 6, swing - angle device 7, sector - table device 8, nose device 9, bed 10, saddle 101, outer cover 102, upper guide rail 103, lower guide rail 104, balance arm 41, tension spring 42, tightening screw 51, hoop body 52, locking buckle 53, locking oil cylinder 54, locking pin 55, circular hole 56, waist - shaped hole 57, swing - angle seat 71, swing - angle driving mechanism 72, swing - angle positioning mechanism 73, swing - angle seat cavity 711, swing - angle driving motor 721, swing - angle driving pulley 722, eccentric shaft 723, swing - angle driving slider 724, swing - angle positioning bottom plate 731, swing - angle positioning oil cylinder 732, swing - angle positioning top plate 733, sector table 81, oil storage press plate 82, hydrostatic drive mechanism 83, sector rotary center shaft 84, oil drain hole 811, oil storage partition strip 821, oil injection chamber 822, oil injection hole 823, oil return groove 824, hydrostatic drive motor 831, hydrostatic drive synchronous pulley 832, hydrostatic drive synchronous belt 833, hydrostatic guide pulley 834, hydrostatic limit pulley 835, hydrostatic limit bracket 836, machine head adjustment seat 91, electric spindle 92, cutting tool 93, electric spindle clamp 94, compensation mechanism 95, clamp positioning oil cylinder 96, upper gib 97, lower gib 98, first clamp 941, second clamp 942, compensation motor 951, coupling 952, ball screw 953, nut seat 954. Specific embodiments

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, and the present invention is not limited to the following embodiments.

[0043] Embodiment

[0044] See Figures 1 to 19 As shown, it should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, if terms such as "upper", "lower", "left", "right", "middle" and "one" are used in this specification, they are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0045] The curve follower machine tool in this embodiment includes a machine head frame seat 1, an aligning bearing 2, a hollow shaft 3, a balance arm device 4, a clamp device 5, a reduction motor 6, a swing angle device 7, a sector table device 8, a machine head device 9, a bed 10 and a saddle 101. Among them, the machine head frame seat 1, the aligning bearing 2, the hollow shaft 3, the balance arm device 4, the clamp device 5, the reduction motor 6 and the swing angle device 7 constitute a machine head frame assembly. The machine head device 9 is installed on the machine head frame assembly, the machine head frame assembly is installed on the sector table device 8, the sector table device 8 is installed on the saddle 101, the saddle 101 is installed on the bed 10, and an outer cover 102 is installed on the bed 10.

[0046] The hollow shaft 3 in the headstock assembly is installed on the headstock seat 1 through a self-aligning bearing 2. The headstock seat 1 is installed on the sector table device 8. The swing angle device 7 is installed on the reduction motor 6. The reduction motor 6 is installed at one end of the hollow shaft 3. The headstock device 9 is installed at the other end of the hollow shaft 3. Both the balance arm device 4 and the hoop device 5 are sleeved outside the hollow shaft 3. The balance arm device 4 is connected to the headstock seat 1, and the hoop device 5 is installed on the headstock seat 1.

[0047] Upper guide rails 103 and lower guide rails 104 are respectively arranged on the upper and lower sides of the saddle 101. The upper guide rails 103 and the lower guide rails 104 are vertically arranged. The upper guide rails 103 are arranged between the sector table device 8 and the saddle 101 and are used to enable the sector table device 8 to move along the upper guide rails 103. The lower guide rails 104 are arranged between the saddle 101 and the bed 10 and are used to enable the saddle 101 to move along the lower guide rails 104.

[0048] The balance arm device 4 in this embodiment includes a balance arm 41 and a tension spring 42. The balance arm 41 is sleeved and fixed outside the hollow shaft 3. One end of the tension spring 42 is connected to the balance arm 41, and the other end of the tension spring 42 is connected to the headstock seat 1.

[0049] The hoop device 5 in this embodiment includes a top screw 51, a hoop body 52, a locking buckle 53, and a locking oil cylinder 54. The top screw 51 is installed on the headstock seat 1. The hoop body 52 is sleeved outside the hollow shaft 3. The lower end of the hoop body 52 contacts the top screw 51. The upper end of the hoop body 52 is locked through the locking buckle 53 and the locking oil cylinder 54.

[0050] The locking buckle 53 in this embodiment is arranged in a U-shaped structure. A circular hole 56 and a waist-shaped hole 57 are arranged on the locking buckle 53. A locking pin 55 is installed at the upper end of each of the two hoop bodies 52. The two locking pins 55 are respectively located in the circular hole 56 and the waist-shaped hole 57. The cylinder barrel of the locking oil cylinder 54 is installed in the locking buckle 53. The piston rod of the locking oil cylinder 54 abuts against the locking pin 55 located in the waist-shaped hole 57. An arc-shaped convex structure is arranged on the hoop body 52, and this arc-shaped convex structure contacts the top screw 51.

[0051] The swing angle device 7 in this embodiment includes a swing angle seat 71, a swing angle driving mechanism 72, and a swing angle positioning mechanism 73. The swing angle seat 71 is installed on the reduction motor 6. The swing angle driving mechanism 72 cooperates with the swing angle seat 71. The swing angle positioning mechanism 73 is installed on the swing angle seat 71, and the swing angle positioning mechanism 73 is located below the swing angle seat cavity 711 arranged on the swing angle seat 71.

[0052] In the swing angle seat 71 of this embodiment, a swing angle seat cavity 711 is provided. The swing angle driving mechanism 72 includes a swing angle driving motor 721, a swing angle driving pulley 722, an eccentric shaft 723, and a swing angle driving slider 724. The swing angle driving pulley 722 and the swing angle driving slider 724 are both installed on the eccentric shaft 723. The swing angle driving slider 724 is located inside the swing angle seat cavity 711. The swing angle driving pulley 722 is driven by a belt in cooperation with the swing angle driving motor 721. The swing angle driving motor 721 and the eccentric shaft 723 are both installed on the machine head frame base 1.

[0053] The swing angle positioning mechanism 73 in this embodiment includes a swing angle positioning bottom plate 731, a swing angle positioning oil cylinder 732, and a swing angle positioning top plate 733. The swing angle positioning bottom plate 731 is installed on the swing angle seat 71, and the swing angle positioning bottom plate 731 is located below the swing angle seat cavity 711. The cylinder barrel of the swing angle positioning oil cylinder 732 is installed on the swing angle positioning bottom plate 731. The piston rod of the swing angle positioning oil cylinder 732 is connected to the swing angle positioning top plate 733. The swing angle positioning top plate 733 cooperates with the swing angle driving slider 724.

[0054] The sector table device 8 in this embodiment includes a sector table 81, an oil sump pressing plate 82, a hydrostatic driving mechanism 83, and a sector rotary center shaft 84. The machine head frame base 1 is installed on the sector table 81 through the sector rotary center shaft 84, and the machine head frame base 1 is driven by the hydrostatic driving mechanism 83 to perform a sector motion along the sector rotary center shaft 84. The oil sump pressing plate 82 is installed at the bottom of the machine head frame base 1. The oil sump pressing plate 82 cooperates with the sector table 81.

[0055] On the lower side of the oil sump pressing plate 82 in this embodiment, an annular oil sump partition strip 821 is provided. The inner side of the oil sump partition strip 821 is an oil injection sump 822, and the outer side of the oil sump partition strip 821 is an oil return groove 824. An oil injection hole 823 is provided on the oil sump pressing plate 82, and the oil injection hole 823 communicates with the oil injection sump 822. A drain hole 811 is provided on the sector table 81, and the drain hole 811 communicates with the oil return groove 824.

[0056] The hydrostatic driving mechanism 83 in this embodiment includes a hydrostatic driving motor 831, a hydrostatic driving synchronous pulley 832, a hydrostatic driving synchronous belt 833, a hydrostatic guide pulley 834, a hydrostatic limit pulley 835, and a hydrostatic limit frame 836. The hydrostatic limit frame 836 is installed on the machine head frame base 1. The hydrostatic limit pulley 835 is installed on the hydrostatic limit frame 836, and the hydrostatic limit pulley 835 is in contact with the sector table 81.

[0057] In this embodiment, the hydrostatic pressure drive motor 831 and the hydrostatic pressure guide pulley 834 are both installed on the headstock base 1. The hydrostatic pressure drive synchronous pulley 832 is installed on the motor shaft of the hydrostatic pressure drive motor 831. Both ends of the hydrostatic pressure drive synchronous belt 833 are respectively installed at both ends of the sector table 81, and the hydrostatic pressure drive synchronous pulley 832 is engaged with the inner side of the hydrostatic pressure drive synchronous belt 833, and the hydrostatic pressure guide pulley 834 is engaged with the outer side of the hydrostatic pressure drive synchronous belt 833.

[0058] In this embodiment, the number of the hydrostatic pressure guide pulleys 834 is two, and both of the two hydrostatic pressure guide pulleys 834 are in contact with the outer side of the hydrostatic pressure drive synchronous belt 833. The number of the hydrostatic pressure drive synchronous pulleys 832 is one, and one hydrostatic pressure drive synchronous pulley 832 is meshed with the inner side of the hydrostatic pressure drive synchronous belt 833. The two hydrostatic pressure guide pulleys 834 and the one hydrostatic pressure drive synchronous pulley 832 are arranged in a triangular structure.

[0059] In this embodiment, the headstock device 9 includes a headstock adjusting seat 91, an electric spindle 92, a tool 93, an electric spindle clamp 94, a compensation mechanism 95 and a clamp positioning oil cylinder 96. The headstock adjusting seat 91 is installed at the other end of the hollow shaft 3. The tool 93 is installed on the electric spindle 92. The electric spindle 92 is installed on the electric spindle clamp 94. Both the electric spindle clamp 94 and the compensation mechanism 95 are installed on the headstock adjusting seat 91, and the electric spindle clamp 94 is connected with the compensation mechanism 95. The electric spindle clamp 94 is positioned by the clamp positioning oil cylinder 96.

[0060] In this embodiment, the electric spindle clamp 94 includes a first clamp 941 and a second clamp 942. The first clamp 941 is connected with the second clamp 942. The compensation mechanism 95 is installed on the second clamp 942. The cylinder barrel of the clamp positioning oil cylinder 96 is installed on the headstock adjusting seat 91. The piston rod of the clamp positioning oil cylinder 96 contacts the upper wedge 97. The upper wedge 97 contacts the upper side of the second clamp 942. The lower side of the second clamp 942 contacts the lower wedge 98. The lower wedge 98 contacts the headstock adjusting seat 91.

[0061] In this embodiment, the compensation mechanism 95 includes a compensation motor 951, a coupling 952, a ball screw 953 and a nut seat 954. The compensation motor 951 is installed on the headstock base 1. The motor shaft of the compensation motor 951 is connected with the coupling 952. The coupling 952 is connected with the ball screw 953. The ball screw 953 penetrates through and is threadedly connected with the nut seat 954. The nut seat 954 is connected with the second clamp 942.

[0062] Specifically, for the curve-following machine tool, the saddle 101 can be moved along the lower guide rail 104 by setting the lower guide rail 104, the sector table device 8 can be moved along the upper guide rail 103 by setting the upper guide rail 103, the headstock seat 1 can be driven to perform a sector motion along the sector rotation center axis 84 by the hydrostatic drive mechanism 83, the rotation angle of the headstock device 9 can be adjusted by driving the hollow shaft 3 to rotate through the reduction motor 6, and the upper and lower positions of the headstock device 9 can be adjusted by driving the hollow shaft 3 to swing up and down with the alignment bearing 2 as the lever fulcrum through the swing angle device 7 provided, so as to realize the multi-dimensional adjustment of the headstock device 9.

[0063] Under normal circumstances, when machining a workpiece, the workpiece makes a circular motion, and the headstock assembly moves linearly along the upper guide rail 103 and the lower guide rail 104 and makes a sector motion along the sector rotation center axis 84. The above three motion directions (the upper guide rail 103, the lower guide rail 104, and the sector rotation center axis 84) are carried out synchronously, or the rotation of the hollow shaft 3 and the position adjustment of the headstock device 9 can be linked with the actions of the upper guide rail 103, the lower guide rail 104, and the sector rotation center axis 84.

[0064] The curve-following machine tool can also realize the machining of curves and surfaces of different workpieces through the expansion of the tool dresser.

[0065] There is a preset offset angle α on the headstock adjustment seat 91. The preset offset angle α is the angle formed between the perpendicular line of the hollow shaft 3 and the axis of the motorized spindle 92. The value range of the preset offset angle α is 0 - 30°, and usually the preset offset angle α is 20°. The purpose of setting the preset offset angle α is to counteract the machining angle of the helical thread when machining workpieces such as screws and worms, so as to expand the machining range of the workpiece.

[0066] The sector table device 8 can be used to realize the sector motion of the machine tool. When realizing the sector motion through the sector table device 8, oil is injected into the oil injection hole 823 to make the oil injection chamber 822 full of oil. Then, a hydrostatic oil film is generated between the upper surface of the sector table 81 and the lower surface of the oil chamber pressing plate 82. The hydrostatic drive motor 831 drives the hydrostatic drive synchronous pulley 832 to rotate. Since the hydrostatic drive synchronous pulley 832 meshes with the hydrostatic drive synchronous belt 833, and the headstock seat 1 is installed on the sector table 81 through the sector rotation center axis 84, the headstock seat 1 and the oil chamber pressing plate 82 can be made to perform a sector motion along the sector rotation center axis 84 on the sector table 81. When performing the sector motion, the hydrostatic limit wheel 835 provided can play a limiting role on the headstock seat 1; when no oil is injected into the oil injection hole 823, the oil chamber partition strip 821 will contact the upper surface of the sector table 81, causing the oil to flow into the oil return groove 824 and be discharged through the oil drain hole 811.

[0067] The headstock frame assembly can adjust the position and angle of the headstock device 9. The headstock device 9 is installed at the other end of the hollow shaft 3. By driving the hollow shaft 3 to rotate through the reduction motor 6, the angle adjustment of the headstock device 9 along the hollow shaft 3 can be realized.

[0068] The swing angle driving motor 721 drives the swing angle driving pulley 722 to rotate. The swing angle driving pulley 722 drives the eccentric shaft 723 to rotate. The eccentric shaft 723 drives the swing angle driving slider 724 to perform eccentric motion and at the same time makes the swing angle driving slider 724 slide in the swing angle seat cavity 711. Furthermore, the swing angle seat 71 drives the reduction motor 6 and the hollow shaft 3 to swing and adjust on the headstock frame base 1. After the adjustment is completed, the swing angle driving motor 721 stops rotating. The swing angle positioning oil cylinder 732 presses against the swing angle positioning top plate 733, so that the swing angle positioning top plate 733 abuts against the swing angle driving slider 724 to realize the positioning of the swing angle driving slider 724.

[0069] When adjusting the hollow shaft 3, the balanced arm device 4 provided can play a balancing role to prevent the hollow shaft 3 from losing balance due to the overweight of the headstock device 9. After the adjustment is completed, the position of the hollow shaft 3 is fixed by the hoop device 5 provided, that is, the locking oil cylinder 54 presses against the locking pin shaft 55 located in the waist-shaped hole 57 so that the two hoop bodies 52 are clamped on the outer wall of the hollow shaft 3. In the initial state, the distance between the two hoop bodies 52 can be adjusted by screwing the two tightening screws 51 according to the outer diameter of the hollow shaft 3.

[0070] As the tool 93 grinds the workpiece, the outer diameter and width of the tool 93 will decrease. The compensation mechanism 95 provided can adjust the position of the tool 93 so that the tool 93 can contact the workpiece and grind the workpiece. When adjusting the position of the tool 93, the compensation motor 951 drives the coupling 952 to rotate. The coupling 952 drives the ball screw 953 to rotate. Since the ball screw 953 is threadedly connected to the nut seat 954 and the nut seat 954 is connected to the motor spindle hoop 94, the motor spindle hoop 94 can be made to move along the axis direction of the motor spindle 92 on the headstock adjustment seat 91 to realize the position adjustment and compensation of the tool 93. After the adjustment is completed, the upper wedge 97 is pushed by the hoop positioning oil cylinder 96 so that the second hoop 942 is clamped between the upper wedge 97 and the lower wedge 98 to realize the position fixation of the motor spindle hoop 94.

[0071] In addition, it should be noted that for the specific embodiments described in this specification, the shapes and names of the components can be different. The above content described in this specification is only an example of the structure of the present invention. Any equivalent changes or simple changes made according to the structure, features and principles conceived in the present invention are included in the protection scope of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications, supplements or use similar ways of substitution to the specific embodiments described, as long as they do not deviate from the structure of the present invention or exceed the scope defined by this claim book, they shall fall within the protection scope of the present invention.

Claims

1. A curve following machine tool, comprising a machine head frame (1), a self-aligning bearing (2), a hollow shaft (3), a reduction motor (6), a bed (10) and a saddle (101), wherein the hollow shaft (3) is mounted on the machine head frame (1) via the self-aligning bearing (2), the reduction motor (6) is mounted on one end of the hollow shaft (3), and the saddle (101) is mounted on the bed (10), characterized in that: It also includes a balancing arm device (4), a clamping hoop device (5), a swing angle device (7), a fan-shaped table device (8) and a head device (9), wherein the swing angle device (7) is mounted on the reduction motor (6), the head device (9) is mounted on the other end of the hollow shaft (3), the head frame (1) is mounted on the fan-shaped table device (8), the fan-shaped table device (8) is mounted on the saddle (101), the balancing arm device (4) and the clamping hoop device (5) are both sleeved outside the hollow shaft (3), the balancing arm device (4) is connected to the head frame (1), and the clamping hoop device (5) is mounted on the head frame (1).

2. The curve following machine tool according to claim 1, characterized in that: The balancing arm device (4) comprises a balancing arm (41) and a tension spring (42); the balancing arm (41) is sleeved and fixed outside the hollow shaft (3); one end of the tension spring (42) is connected to the balancing arm (41); and the other end of the tension spring (42) is connected to the machine head frame (1).

3. The curve following machine tool according to claim 1, characterized in that: The clamp device (5) comprises a tightening screw (51), a clamp body (52), a locking buckle (53) and a locking cylinder (54); the tightening screw (51) is mounted on the machine head frame (1); the clamp body (52) is sleeved outside the hollow shaft (3); the lower end of the clamp body (52) is in contact with the tightening screw (51); and the upper end of the clamp body (52) is locked by the locking buckle (53) and the locking cylinder (54).

4. The curve following machine tool according to claim 3, characterized in that: The locking buckle (53) is arranged in a U-shaped structure. A circular hole (56) and a waist-shaped hole (57) are arranged on the locking buckle (53). A locking pin (55) is respectively installed at the upper end of the two clamp bodies (52). The two locking pins (55) are respectively located in the circular hole (56) and the waist-shaped hole (57). The cylinder barrel of the locking oil cylinder (54) is installed in the locking buckle (53). The piston rod of the locking oil cylinder (54) abuts against the locking pin (55) located in the waist-shaped hole (57). The clamp body (52) is provided with an arc-shaped protrusion structure, and the arc-shaped protrusion structure contacts the tightening screw (51).

5. The curve following machine tool according to claim 1, characterized in that: The swing angle device (7) comprises a swing angle seat (71) and a swing angle driving mechanism (72), wherein the swing angle seat (71) is mounted on the reduction motor (6), and the swing angle driving mechanism (72) cooperates with the swing angle seat (71); And / or; a swing angle seat cavity (711) is provided on the swing angle seat (71); the swing angle driving mechanism (72) comprises a swing angle driving motor (721), a swing angle driving pulley (722), an eccentric shaft (723) and a swing angle driving slider (724); the swing angle driving pulley (722) and the swing angle driving slider (724) are both mounted on the eccentric shaft (723); the swing angle driving slider (724) is located in the swing angle seat cavity (711); the swing angle driving pulley (722) and the swing angle driving motor (721) are driven by a belt; and the swing angle driving motor (721) and the eccentric shaft (723) are both mounted on the machine head frame (1).

6. The curve following machine tool according to claim 5, characterized in that: The swing angle device (7) further comprises a swing angle positioning mechanism (73), wherein the swing angle positioning mechanism (73) is mounted on the swing angle seat (71), and the swing angle positioning mechanism (73) is located below the swing angle seat cavity (711); And / or; the swing angle positioning mechanism (73) comprises a swing angle positioning base plate (731), a swing angle positioning oil cylinder (732) and a swing angle positioning top plate (733); the swing angle positioning base plate (731) is mounted on the swing angle seat (71), and the swing angle positioning base plate (731) is located below the swing angle seat cavity (711); the cylinder barrel of the swing angle positioning oil cylinder (732) is mounted on the swing angle positioning base plate (731); the piston rod of the swing angle positioning oil cylinder (732) is connected to the swing angle positioning top plate (733); and the swing angle positioning top plate (733) cooperates with the swing angle driving slider (724).

7. The curve following machine tool according to claim 1, characterized in that: The fan-shaped table device (8) comprises a fan-shaped table (81), an oil bin pressure plate (82), a static pressure driving mechanism (83) and a fan-shaped rotating center axis (84); the machine head frame (1) is mounted on the fan-shaped table (81) via the fan-shaped rotating center axis (84); the machine head frame (1) is driven by the static pressure driving mechanism (83) to perform fan-shaped motion along the fan-shaped rotating center axis (84); the oil bin pressure plate (82) is mounted at the bottom of the machine head frame (1); and the oil bin pressure plate (82) cooperates with the fan-shaped table (81).

8. The curve following machine tool according to claim 7, characterized in that: An oil bin spacer (821) having a ring-shaped structure is arranged at the lower side of the oil bin pressure plate (82); the inner side of the oil bin spacer (821) is an oil filling bin (822); the outer side of the oil bin spacer (821) is an oil return groove (824); an oil filling hole (823) is arranged on the oil bin pressure plate (82); the oil filling hole (823) is connected to the oil filling bin (822); an oil discharge hole (811) is arranged on the fan-shaped platform (81); the oil discharge hole (811) is connected to the oil return groove (824); and / or; the static pressure driving mechanism (83) comprises a static pressure driving motor (831), a static pressure driving synchronous pulley (832), a static pressure driving synchronous belt (833), a static pressure guide wheel (834), a static pressure limiting wheel (835) and a static pressure limiting frame (836), the static pressure limiting frame (836) being mounted on the machine head frame (1), the static pressure limiting wheel (835) being mounted on the static pressure limiting frame (836), and the static pressure limiting wheel (835) being in contact with the fan-shaped table (81); and / or; the hydrostatic drive motor (831) and the hydrostatic guide wheel (834) are both mounted on the machine head frame (1), the hydrostatic drive synchronous pulley (832) is mounted on the motor shaft of the hydrostatic drive motor (831), the two ends of the hydrostatic drive synchronous belt (833) are respectively mounted on the two ends of the fan-shaped table (81), and the hydrostatic drive synchronous pulley (832) cooperates with the inner side of the hydrostatic drive synchronous belt (833), and the hydrostatic guide wheel (834) cooperates with the outer side of the hydrostatic drive synchronous belt (833); And / or; the number of the hydrostatic guide wheels (834) is two, the two hydrostatic guide wheels (834) are in contact with the outer side of the hydrostatic drive synchronous belt (833), the number of the hydrostatic drive synchronous pulley (832) is one, the one hydrostatic drive synchronous pulley (832) is meshed with the inner side of the hydrostatic drive synchronous belt (833), and the two hydrostatic guide wheels (834) and the one hydrostatic drive synchronous pulley (832) are arranged in a triangular structure.

9. The curve following machine tool according to claim 1, characterized in that: The machine head device (9) comprises a machine head adjustment seat (91), an electric spindle (92), a tool (93), an electric spindle clamp (94), a compensation mechanism (95) and a clamp positioning cylinder (96); the machine head adjustment seat (91) is mounted on the other end of the hollow shaft (3); the tool (93) is mounted on the electric spindle (92); the electric spindle (92) is mounted on the electric spindle clamp (94); the electric spindle clamp (94) and the compensation mechanism (95) are both mounted on the machine head adjustment seat (91); the electric spindle clamp (94) is connected to the compensation mechanism (95); the electric spindle clamp (94) is positioned by the clamp positioning cylinder (96); and / or; a preset offset angle α is present on the machine head adjustment seat (91); the preset offset angle α has a value range of 0-30°.

10. The curve following machine tool according to claim 9, characterized in that: The electric spindle clamp (94) comprises a first clamp (941) and a second clamp (942), the first clamp (941) is connected to the second clamp (942), the compensation mechanism (95) is mounted on the second clamp (942), the cylinder barrel of the clamp positioning oil cylinder (96) is mounted on the machine head adjustment seat (91), the piston rod of the clamp positioning oil cylinder (96) is in contact with an upper plug (97), the upper plug (97) is in contact with the upper side of the second clamp (942), the lower side of the second clamp (942) is in contact with a lower plug (98), and the lower plug (98) is in contact with the machine head adjustment seat (91); And / or; the compensation mechanism (95) comprises a compensation motor (951), a coupling (952), a ball screw (953) and a nut seat (954); the compensation motor (951) is mounted on the machine head frame (1); the motor shaft of the compensation motor (951) is connected to the coupling (952); the coupling (952) is connected to the ball screw (953); the ball screw (953) and the nut seat (954) penetrate and are threadedly connected; the nut seat (954) is connected to the second clamp (942).

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