A torque increasing device for machine tool milling head

Abstract

The present invention discloses a torque increasing device for a milling head of a machine tool, comprising a ram, a ram mounting platform is arranged at the bottom of the ram, a first milling cutter head is detachably connected to the bottom of the ram mounting platform, a first input spindle is fixedly connected to the top of the first milling cutter head, a first milling head automatic magazine changing assembly is arranged below the first milling cutter head, a second milling head automatic magazine changing assembly is arranged below the first milling head automatic magazine changing assembly, the first milling head automatic magazine changing assembly and the second milling head automatic magazine changing assembly are respectively slidably connected to a fixed plate, a milling head torque increasing gear box is arranged inside the second milling head automatic magazine changing assembly, the output end of the milling head torque increasing gear box is transmission-connected to the second milling cutter head, the top of the milling head torque increasing gear box is detachably connected to the ram mounting platform, and has the advantages of increasing the output torque of the spindle, increasing the milling amount of the workpiece each time, increasing the processing feed rate, saving the time required for manual replacement of the cutter head, and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool equipment, and in particular to a torque increasing device for a machine tool milling head. Background Art

[0002] A milling cutter is a rotary tool with one or more teeth used for milling. When working, each tooth cuts off the workpiece's excess in sequence and intermittently. The milling cutter is mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines, and plays an important role in the processing of mechanical equipment. In the actual tool selection and use process, one of the important factors that determine the milling quality and processing efficiency of the milling cutter is the torque of the milling cutter. The milling torque of the tool refers to the rotational torque of the milling cutter on the workpiece during the milling process. It can affect the size and direction of the cutting force, and then affect the quality and accuracy of the machined surface. At the same time, the milling torque of the tool will also affect the dynamic response and cutting stability during processing.

[0003] In the actual parts processing process in this field, small-batch production with high efficiency and high precision is usually taken as a production requirement. That is to say, strong material removal capability is required for rough processing of parts, while high surface quality is required for fine processing. Moreover, if the minimum processing path spacing is required within a certain processing time, the machine tool needs to have a sufficiently large processing feed rate.

[0004] However, the existing machine tool milling cutter head spindle adopts a direct-connected motor and an ordinary reducer to enable the milling cutter head to process the workpiece. When the specifications of the direct-connected motor and the ordinary reducer remain unchanged, this method will cause the spindle output torque to be small. Therefore, it is necessary to reduce the amount of cutting by the milling cutter, so that the amount of milling for the workpiece each time is reduced, causing the machine tool processing speed to slow down and the processing feed rate to decrease.

[0005] In addition, the existing machine tool milling cutter head needs to be stopped and replaced manually, which not only takes a long time to replace, but also consumes manpower. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The purpose of the present invention is to provide a torque increasing device for a machine tool milling head, so as to solve the problems in the prior art that the spindle output torque is small, resulting in reduced cutting depth of the milling cutter, reduced milling amount of the workpiece, low processing feed rate, and time-consuming and labor-intensive manual replacement of the milling cutter head. (II) Summary of the invention

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a torque increasing device for a milling head of a machine tool, comprising a ram, a ram mounting platform is arranged at the bottom of the ram, a fixed plate is arranged below the ram, a first milling cutter head is detachably connected to the bottom of the ram mounting platform, a first input spindle is fixedly connected to the top of the first milling cutter head, a first milling head automatic magazine changing assembly is arranged below the first milling cutter head, a second milling head automatic magazine changing assembly is arranged below the first milling head automatic magazine changing assembly, the first milling head automatic magazine changing assembly and the second milling head automatic magazine changing assembly are respectively slidably connected to the fixed plate, a milling head torque increasing gear box is arranged inside the second milling head automatic magazine changing assembly, the output end of the milling head torque increasing gear box is transmission-connected to the second milling cutter head, and the top of the milling head torque increasing gear box is detachably connected to the ram mounting platform;

[0010] The milling head torque increasing gearbox includes a gear box body, a second input main shaft is arranged on the inner top of the gear box body, and the bottom of the second input main shaft is fixedly connected to the center gear shaft through a coupling, two first bearings are arranged between the center gear shaft and the gear box body, so that the center gear shaft can rotate in the gear box body, a first center support frame and a second center support frame are arranged on the outer side of the center gear shaft, a second bearing is arranged between the first center support frame and the second center support frame, a first peripheral gear is arranged on the bottom of the first center support frame, and a second peripheral gear is arranged on the bottom of the second center support frame, a first straight tooth is integrated on the inner wall of the gear box body, and two rows of second straight teeth are integrated on the inner wall of the center gear shaft, the first peripheral gear is meshed with the first straight tooth and the second straight tooth located in the upper row, the second peripheral gear is meshed with the second straight tooth located in the lower row, and the output main shaft is meshed at the center position of multiple second peripheral gears.

[0011] Preferably, a plurality of positioning pins are respectively provided on the top of the first milling cutter head and the top of the milling head torque amplification gear box, positioning holes matching the positioning pins are provided on the bottom of the slide mounting platform, and a hydraulic tensioning mechanism is also provided on the slide mounting platform.

[0012] Preferably, the first milling head automatic magazine changing assembly and the second milling head automatic magazine changing assembly respectively include a sliding displacement mechanism, the sliding displacement mechanism includes a fixed seat, the fixed seat is fixedly connected to the fixed plate, a guide rail is arranged between the fixed seats, a driving motor is arranged at one end of the fixed seat, a reducer is arranged at the output end of the driving motor, the output end of the reducer is transmission-connected to a lead screw through the side wall of the fixed seat, and the end of the lead screw away from the driving motor is rotatably connected to the fixed seat.

[0013] Preferably, the first milling head automatic magazine changing assembly also includes a first milling head magazine, the first milling head magazine is threadedly connected to the screw, the first milling head magazine is slidingly connected to the guide rail, and the first milling head magazine is internally provided with a first placement groove that can accommodate and support the first milling head.

[0014] Preferably, the second milling head automatic magazine changing assembly also includes a second milling head magazine, the second milling head magazine is threadedly connected to the lead screw, the second milling head magazine is slidingly connected to the guide rail, and the second milling head magazine is provided with a second placement groove that can accommodate and support the milling head torque increasing gear box.

[0015] Preferably, the milling head torque increasing gear box includes a gear box body, a second input spindle is provided at the inner top of the gear box body, and the bottom of the second input spindle is fixedly connected to the center gear shaft through a coupling, and two first bearings are provided between the center gear shaft and the gear box body, so that the center gear shaft can rotate in the gear box body, a first center support frame and a second center support frame are provided on the outer side of the center gear shaft, a second bearing is provided between the first center support frame and the second center support frame, a first peripheral gear is provided at the bottom of the first center support frame, and a second peripheral gear is provided at the bottom of the second center support frame, a first straight tooth is integrated on the inner wall of the gear box body, and two rows of second straight teeth are integrated on the inner wall of the center gear shaft, the first peripheral gear is meshed with the first straight tooth and the second straight teeth located in the upper row, the second peripheral gear is meshed with the second straight teeth located in the lower row, and the output spindle is meshed at the center position of multiple second peripheral gears.

[0016] (III) Beneficial effects

[0017] The torque increasing device for a machine tool milling head provided by the present invention has the following advantages:

[0018] 1. By setting a gearbox for increasing the torque of the milling head, a central gear shaft is set between the input spindle and the output spindle, and a central support frame is set outside the central gear shaft to provide support for the peripheral gear set. Through the engagement of the peripheral gear set with the central gear shaft and the spur teeth on the gear box body, the output spindle has a large number of meshing teeth and a large overlap coefficient, which increases the output torque of the output spindle, effectively deepens the cutting amount of the milling cutter on the workpiece, increases the milling amount of the workpiece each time, greatly improves the processing speed of the machine tool, and significantly improves the processing feed rate, thereby upgrading the processing efficiency.

[0019] 2. By setting multiple positioning pins on the ram mounting table and the milling head gear box, accurate positioning can be achieved. When the ram mounting table and the milling head gear box are automatically installed, multiple positioning grooves and positioning pins are clamped with each other, so that the ram and the milling cutter head are accurately matched to prevent gaps and looseness, thereby improving the processing accuracy of the milling head and achieving high production accuracy of the equipment.

[0020] 3. By setting a sliding connection between the first milling head automatic magazine changing assembly and the fixed plate and the second milling head automatic magazine changing assembly and the fixed plate, the first milling head magazine and the second milling head magazine can slide along the screw independently by driving the motor to control the rotation of the lead screw. When the torque of the milling head needs to be increased, the first milling head magazine is moved to the bottom of the left ram. After the ram moves into place, the first milling head is released by the hydraulic tensioning mechanism, and the milling head is embedded in the placement groove. Then the ram leaves the first milling head magazine, and the first milling head magazine is moved to the right side of the fixed plate, and then the second The milling head warehouse is moved under the ram, and the hydraulic tensioning mechanism is used to assemble the ram and the milling head torque increasing gearbox. When the first milling head in the first milling head warehouse needs to be replaced, it can be replaced after the first milling head warehouse is moved to the right side of the fixed plate. The new first milling head is placed in the placement slot for the next assembly, so that the milling head can be replaced without stopping the machine. In addition, the cooperation of the automatic warehouse changing assembly of the first milling head and the automatic warehouse changing assembly of the second milling head with the hydraulic tensioning mechanism further saves manpower, shortens the tool changing time, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the plane structure of the present invention;

[0023] Figure 2 Schematic diagram of the position relationship of the positioning pins in the present invention;

[0024] Figure 3 A schematic diagram of the positional relationship of the positioning holes in the present invention;

[0025] Figure 4 It is a schematic diagram of the planar structure of the sliding displacement mechanism in the present invention;

[0026] Figure 5 It is a schematic diagram of the internal planar structure of the milling head torque amplification gear box in the present invention.

[0027] Explanation of the reference numerals in the figure: 1. ram; 2. ram mounting table; 3. fixing plate; 4. first milling cutter head; 5. first input spindle; 6. hydraulic tensioning mechanism; 7. first milling head automatic magazine changing assembly; 71. first milling cutter head magazine; 8. second milling head automatic magazine changing assembly; 81. second milling cutter head magazine; 9. milling head torque amplification gear box; 91. gear box body; 92. second input spindle; 93. center gear shaft; 94. first bearing; 95. first center support frame; 96. second center support frame; 97. second bearing; 98. first peripheral gear; 99. second peripheral gear; 910. first straight tooth; 911. second straight tooth; 912. output spindle; 10. second milling cutter head; 11. positioning pin; 12. positioning hole; 13. sliding displacement mechanism; 131. fixing seat; 132. guide rail; 133. driving motor; 134. screw. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figure 1-Figure 5A torque increasing device for a milling head of a machine tool comprises a ram 1, a ram mounting platform 2 is arranged at the bottom of the ram 1, the ram 1 can move horizontally and vertically to the horizontal direction, driving a first milling cutter head 4 or a second milling cutter head 10 to process a workpiece, a fixed plate 3 is arranged at the bottom of the ram mounting platform 2, the first milling cutter head 4 is detachably connected to the bottom, the first input spindle 5 is fixedly connected to the top of the first milling cutter head 4, a first milling head automatic magazine changing assembly 7 is arranged below the first milling cutter head 4, a second milling head automatic magazine changing assembly 8 is arranged below the first milling head automatic magazine changing assembly 7, the first milling head automatic magazine changing assembly 7 and the second milling head automatic magazine changing assembly 8 are respectively slidably connected to the fixed plate 3, a milling head torque increasing gear box 9 is arranged inside the second milling head automatic magazine changing assembly 8, the output end of the milling head torque increasing gear box 9 is transmission-connected to the second milling cutter head 10, and the top of the milling head torque increasing gear box 9 is detachably connected to the ram mounting platform 2.

[0031] Furthermore, in order to realize a detachable connection between the slide mounting platform 2 and the first milling cutter head 4 and the milling head torque increasing gear box 9 respectively, a plurality of positioning pins 11 are respectively arranged on the top of the first milling cutter head 4 and the top of the milling head torque increasing gear box 9, and a positioning hole 12 adapted to the positioning pin is opened at the bottom of the slide mounting platform 2. A hydraulic tensioning mechanism 6 is also arranged on the slide mounting platform 2. When the slide 1 falls, the positioning pin 11 enters into the positioning hole 12, and the two are fixed by using the hydraulic tensioning mechanism 6, thereby realizing the fixation of the first milling cutter head 4 and the milling head torque increasing gear box 9, and then realizing the subsequent use.

[0032] Furthermore, the first milling head automatic magazine changing assembly 7 and the second milling head automatic magazine changing assembly 8 respectively include a sliding displacement mechanism 13, the sliding displacement mechanism 13 includes a fixed seat 131, the fixed seat 131 is fixedly connected to the fixed plate 3, a guide rail 132 is arranged between the fixed seats 131, a driving motor 133 is arranged at one end of the fixed seat 131, a reducer is arranged at the output end of the driving motor 133, and a lead screw 134 is connected to the fixed seat 131 through the side wall of the fixed seat for transmission. The end of the lead screw 134 away from the driving motor 133 is rotatably connected to the fixed seat 131, and the lead screw 134 is driven to rotate by the driving motor 133, so that the first milling head automatic magazine changing assembly 7 and the second milling head automatic magazine changing assembly 8 can be driven to move horizontally along the guide rail 132.

[0033] The first milling head automatic magazine changing assembly 7 also includes a first milling head magazine 71, the first milling head magazine 71 is threadedly connected to the lead screw 134, the first milling head magazine 71 is slidably connected to the guide rail 132, and the first milling head magazine 71 is provided with a first placement groove capable of accommodating and supporting the first milling head 4.

[0034] The second milling head automatic magazine changing assembly 8 also includes a second milling head magazine 81, which is threadedly connected to the lead screw 134, and slidably connected to the guide rail 132. The second milling head magazine 81 is provided with a second placement groove that can accommodate and support the milling head torque increasing gear box 9. According to usage requirements, the first milling head 4 or the milling head torque increasing gear box 9 to be used is moved to the bottom of the slide 1, ready to be fixedly installed with the slide mounting table 2, and then the first milling head 4 or the second milling head 10 fixedly connected to the milling head torque increasing gear box 9 is used.

[0035] Furthermore, the milling head torque amplification gearbox 9 includes a gearbox body 91, a second input spindle 92 is provided at the inner top of the gearbox body 91, and a central gear shaft 93 is fixedly connected to the bottom of the second input spindle 92 through a coupling, so that the central gear shaft 93 can rotate simultaneously with the second input spindle 92, and two first bearings 94 are provided between the central gear shaft 93 and the gearbox body 91, so that the central gear shaft 93 can rotate in the gearbox body 91, and a first central support frame 95 and a second central support frame 96 are distributed on the outer side of the central gear shaft 93, a second bearing 97 is provided between the first central support frame 95 and the second central support frame 96, and a first central bearing 98 is provided at the bottom of the first central support frame 95. A peripheral gear 98, a second peripheral gear 99 is arranged at the bottom of the second center support frame 96, a first straight tooth 910 is integrated on the inner wall of the gear box body 91, and two rows of second straight teeth 911 are integrated on the outer wall of the center gear shaft 93. The first peripheral gear 98 is meshed with the first straight tooth 910 and the second straight teeth 911 located in the upper row, and the second peripheral gear 99 is meshed with the second straight teeth 911 located in the lower row. An output spindle 912 is meshed at the center position of multiple second peripheral gears 99. The second peripheral gear 99 drives the central output spindle 912 to rotate, and the output spindle 912 drives the second milling cutter head 10 to rotate, thereby realizing milling processing of the workpiece.

[0036] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torque increasing device for a milling head of a machine tool, comprising a ram (1), a ram mounting platform (2) being arranged at the bottom of the ram (1), and a fixing plate (3) being arranged below the ram (1), characterized in that: The bottom of the ram mounting platform (2) is detachably connected to a first milling cutter head (4), the top of the first milling cutter head (4) is fixedly connected to a first input spindle (5), a first milling head automatic magazine change assembly (7) is arranged below the first milling head (4), a second milling head automatic magazine change assembly (8) is arranged below the first milling head automatic magazine change assembly (7), the first milling head automatic magazine change assembly (7) and the second milling head automatic magazine change assembly (8) are respectively slidably connected to the fixed plate (3), a milling head torque amplification gear box (9) is arranged inside the second milling head automatic magazine change assembly (8), the output end of the milling head torque amplification gear box (9) is transmission-connected to the second milling cutter head (10), and the top of the milling head torque amplification gear box (9) is detachably connected to the ram mounting platform (2); The milling head torque amplifying gearbox (9) comprises a gearbox body (91), a second input spindle (92) is arranged at the inner top of the gearbox body (91), a center gear shaft (93) is fixedly connected to the bottom of the second input spindle (92) via a coupling, two first bearings (94) are arranged between the center gear shaft (93) and the gearbox body (91) so as to enable the center gear shaft (93) to rotate in the gearbox body (91), a first center support frame (95) and a second center support frame (96) are arranged on the outer side of the center gear shaft (93), a second bearing (97) is arranged between the first center support frame (95) and the second center support frame (96), and the A first peripheral gear (98) is provided at the bottom of the first central support frame (95), a second peripheral gear (99) is provided at the bottom of the second central support frame (96), a first straight tooth (910) is integrally provided on the inner wall of the gear housing (91), two rows of second straight teeth (911) are integrally provided on the inner wall of the central gear shaft (93), the first peripheral gear (98) is meshed with the first straight tooth (910) and the second straight teeth (911) located in the upper row, the second peripheral gear (99) is meshed with the second straight teeth (911) located in the lower row, and an output main shaft (912) is meshed at the center position of the plurality of second peripheral gears (99).

2. A torque increasing device for a machine tool milling head according to claim 1, characterized in that: A plurality of positioning pins (11) are respectively arranged at the top of the first milling cutter head (4) and the top of the milling head torque amplification gear box (9); a positioning hole (12) matching the positioning pins (11) is provided at the bottom of the ram mounting platform (2); and a hydraulic tensioning mechanism (6) is also arranged on the ram mounting platform (2).

3. The torque increasing device for a machine tool milling head according to claim 1, characterized in that: The first milling head automatic magazine changing assembly (7) and the second milling head automatic magazine changing assembly (8) respectively comprise a sliding displacement mechanism (13), the sliding displacement mechanism (13) comprising a fixed seat (131), the fixed seat (131) being fixedly connected to the fixed plate (3), a guide rail (132) being arranged between the fixed seats (131), a driving motor (133) being arranged at one end of the fixed seat (131), a reducer being arranged at the output end of the driving motor (133), the output end of the reducer passing through the side wall of the fixed seat (131) being transmission-connected to a lead screw (134), and one end of the lead screw (134) away from the driving motor (133) being rotationally connected to the fixed seat (131).

4. A torque increasing device for a machine tool milling head according to claim 3, characterized in that: The first milling head automatic magazine changing assembly (7) further comprises a first milling head magazine (71), the first milling head magazine (71) being threadedly connected to the lead screw (134), the first milling head magazine (71) being slidably connected to the guide rail (132), and a first placement groove capable of accommodating and supporting the first milling head (4) being provided inside the first milling head magazine (71).

5. The torque increasing device for a machine tool milling head according to claim 3, characterized in that: The second milling head automatic magazine changing assembly (8) further comprises a second milling head magazine (81), the second milling head magazine (81) being threadedly connected to the lead screw (134), the second milling head magazine (81) being slidably connected to the guide rail (132), and a second placement groove capable of accommodating and supporting the milling head torque amplification gear box (9) being provided in the second milling head magazine (81).

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