CN112222883A - Shaft bracket device for milling large screw rotor - Google Patents

Shaft bracket device for milling large screw rotor Download PDF

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Publication number
CN112222883A
CN112222883A CN202011018470.2A CN202011018470A CN112222883A CN 112222883 A CN112222883 A CN 112222883A CN 202011018470 A CN202011018470 A CN 202011018470A CN 112222883 A CN112222883 A CN 112222883A
Authority
CN
China
Prior art keywords
bracket
ejector rod
shaft
clamping
arc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011018470.2A
Other languages
Chinese (zh)
Inventor
余云明
许星
柳缪佳
吴洁
石中玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Dalong Machinery Factory Co ltd
Original Assignee
Shanghai Dalong Machinery Factory Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Dalong Machinery Factory Co ltd filed Critical Shanghai Dalong Machinery Factory Co ltd
Priority to CN202011018470.2A priority Critical patent/CN112222883A/en
Publication of CN112222883A publication Critical patent/CN112222883A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06Work-clamping means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06Work-clamping means
    • B23Q3/062Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06Work-clamping means
    • B23Q3/062Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • B23Q3/064Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding elongated workpieces, e.g. pipes, bars or profiles

Abstract

The invention relates to a shaft bracket device for milling a large screw rotor, which comprises two shaft brackets and a working sliding table, wherein the length direction of the working sliding table is consistent with the axial direction of the screw rotor, the two shaft brackets are erected on the working sliding table side by side from left to right and can adjust the distance on the working sliding table, each shaft bracket comprises a base body matched with the working sliding table and a bracket body connected to the base body, each bracket body is provided with an arc-shaped bracket and a plurality of mechanical clamping ejector rods arranged along the circumferential direction of the arc-shaped bracket, and the plurality of mechanical clamping ejector rods can stretch along the radial direction of the arc-shaped bracket. Compared with the prior art, the invention adopts the mechanical clamping ejector rod, has good operability, high clamping stability and larger clamping force, can carry out pre-tightening, is suitable for clamping parts with different diameters and sizes, replaces a hydraulic shaft bracket and can greatly improve the processing efficiency of the rotor.

Description

Shaft bracket device for milling large screw rotor
Technical Field
The invention relates to the technical field of large screw rotor machining, in particular to a shaft bracket device for milling a large screw rotor.
Background
In the semi-finishing process of a large screw rotor (generally, rotors with outer circles phi 816 and phi 630), a shaft bracket is needed to support the large screw rotor, the cutting load is large, a hydraulic bracket matched with an original inlet is used, the integral rigidity is weak due to the inherent characteristics of hydraulic clamping, the clamping force of the hydraulic bracket can not meet the support requirement far away, in addition, a hydraulic ejector rod is clamped by a mechanical spring expansion sleeve, the clamping force can not maintain the impact of the large cutting force for a long time, and the pre-tightening force during tightening is almost zero. In nearly 4 years of introduction of the machine tool, the processing efficiency is extremely low, and the roughness cannot be guaranteed even in the finishing and finishing machining of a large screw rotor (the machine tool belongs to a novel machine tool of HOLROYD company in England, and only the first two machine tools are sold in far east). Therefore, a need exists for a shaft bracket having a strong clamping force. In addition, because the semi-finishing machining space of the large screw rotor is narrow, the high requirement is provided for the design of the novel shaft bracket, and the operability is ensured besides the function.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a shaft bracket device for milling a large screw rotor.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a large-scale screw rotor is axle bracket device for milling process, includes two axle brackets and a work slip table, the length direction of work slip table unanimous with screw rotor axial direction, two axle brackets a left side and a right side erect on the work slip table side by side to can adjust the distance on the work slip table, the axle bracket include with the pedestal of work slip table looks adaptation and connect the bracket body on the pedestal, the bracket body have the arc hold in the palm the groove and hold in the palm a plurality of mechanical type centre gripping ejector pins that groove circumference was arranged along the arc, a plurality of mechanical type centre gripping ejector pins can follow the arc and hold in the groove radial direction and stretch out and draw back.
Preferably, the opening of the arc-shaped bracket faces forwards, three mechanical clamping ejector rods are arranged along the circumferential direction of the arc-shaped bracket, namely an upper clamping ejector rod arranged at the top end of the arc-shaped bracket, a lower clamping ejector rod arranged at the bottom end of the arc-shaped bracket and a middle clamping ejector rod arranged between the upper clamping ejector rod and the lower clamping ejector rod, the lower clamping ejector rod is arranged along the vertical direction, the middle clamping ejector rod is arranged along the horizontal direction and faces the center of the opening of the arc-shaped bracket, and the included angle between the upper clamping ejector rod and the middle clamping ejector rod is larger than 90 degrees;
the upper clamping ejector rod, the middle clamping ejector rod and the lower clamping ejector rod are all composed of nut ejector rods which are arranged in the bracket body in a penetrating mode and can slide along the axial direction, and screw rods which are arranged in the nut ejector rods in a penetrating mode and are rotatably connected with the bracket body.
Preferably, the upper clamping ejector rod is connected with a first rotary driving mechanism, and the first rotary driving mechanism is a square pillow connected to the top end of the screw rod of the upper clamping ejector rod.
Preferably, the lower clamping ejector rod is connected with a second rotation driving mechanism, and the second rotation driving mechanism comprises a lower vertical rotating shaft, a square pillow and a gear set, wherein the lower vertical rotating shaft is arranged on one side of the bracket body and is rotatably connected with the seat body, the square pillow is connected to the top end of the lower vertical rotating shaft, and the gear set is used for connecting the lower vertical rotating shaft and a screw rod of the lower clamping ejector rod.
Preferably, the middle clamping ejector rod is connected with a third rotation driving mechanism, the third rotation driving mechanism comprises a middle vertical rotation shaft, a square pillow, a first bevel gear, a second bevel gear, a middle horizontal rotation shaft, a gear set and a screw rod, the middle vertical rotation shaft is arranged on one side of the bracket body and is rotatably connected with the base, the square pillow is connected to the top end of the middle vertical rotation shaft, the first bevel gear is sleeved on the middle vertical rotation shaft, the second bevel gear is perpendicular to the rotation shaft of the first bevel gear, the middle horizontal rotation shaft penetrates through the second bevel gear and is parallel to the screw rod of the middle clamping ejector rod.
Preferably, the end part of the nut ejector rod is connected with a replaceable copper pad, and the end part of the copper pad is provided with an arc groove matched with the shaft diameter of the large-scale screw rotor.
Preferably, the copper pad utilizes tang interference to connect, keyway rotational positioning to be connected with nut ejector pin with the form of hexagon socket head cap screw is fixed, the inside of copper pad has seted up the lubricated oil hole.
Preferably, the work sliding table is provided with a plurality of T-shaped guide grooves, and the base body of the shaft bracket is provided with a plurality of groups of T-shaped sliding blocks matched with the T-shaped guide grooves.
Preferably, the bottom of the seat body is further provided with a cushion block for supporting the shaft bracket in cooperation with the working sliding table.
Preferably, the diameter of the mechanical clamping ejector rod is 70 mm.
According to the invention, two shaft brackets are erected on the working sliding table, the rotation center is far away from the end surface of the working sliding table by a larger distance (for example, the distance can be 450mm, so that the processing of a large screw rotor can be met), and the shaft brackets can slide relative to the working sliding table, so that the distance between the two shaft brackets is adjusted. During operation, the two shaft brackets respectively clamp the shafts at the two ends of the large screw rotor.
The large screw rotor is clamped by the mechanical clamping ejector rod of the screw rod structure, the integral rigidity is effectively improved compared with a hydraulic shaft bracket, the shaft of the large screw rotor can be pre-tightened to a certain degree, and the pre-tightening is very helpful for improving the rough machining quality. Furthermore, the existing band-type brake (or band-type) mechanism or the self-locking screw rod can be adopted, so that the screw rod is prevented from being loosened by vibration during impact cutting processing.
According to the invention, the screw rod is rotated by adopting a manual pulling mode, and the space above the shaft bracket can ensure that the screw rod of the upper clamping mandril is directly rotated to rotate, so that the top end of the screw rod of the upper clamping mandril extends out of the top end of the bracket body of the shaft bracket and is directly connected with the square pillow (the square pillow is provided with the block bodies with four side surfaces, and is convenient to be matched with a manual pulling tool to be screwed). And the lower part of the lower clamping ejector rod (provided with a working sliding table) and the rear part of the middle clamping ejector rod (behind equipment) are not provided with operation spaces, so that for the lower clamping ejector rod, the rotary motion of the screw rod of the lower clamping ejector rod is converted into the rotary motion of a lower vertical rotating shaft positioned on one side of the bracket body through a gear set (such as a three-level gear), the lower clamping ejector rod is provided with the operation spaces, the top of the lower vertical rotating shaft is connected with the square pillow, and the rotary square pillow is driven through the gear set to rotate, so that the screw rod of the lower clamping ejector rod rotates. For the middle clamping ejector rod, the rotary motion of a screw rod (axially along the horizontal direction) of the middle clamping ejector rod is converted into the rotary motion of a middle vertical rotating shaft (axially along the vertical direction) positioned at one side of the bracket body through a gear set and two bevel gears which are vertical to each other. Thereby make the rotation of middle part centre gripping ejector pin possess operating space, through the top connection square pillow of the vertical axis of rotation in middle part, through rotating the square pillow and passing through bevel gear and gear train transmission to the lead screw that makes middle part centre gripping ejector pin takes place to rotate. Through the conversion of the transmission mechanism, the adjustment of the mechanical clamping ejector rod has an adjustment space. The second rotation driving mechanism and the third rotation driving mechanism which are positioned on the shaft bracket on the left side are arranged on the left side of the bracket body, and the second rotation driving mechanism and the third rotation driving mechanism which are positioned on the shaft bracket on the right side are arranged on the right side of the bracket body so as to facilitate operation.
In the invention, a method for replacing the copper pad is adopted, and the circular arc grooves meeting the requirements of different diameters are processed on the copper pad, so that the clamping sizes of various diameters can be met, and the stability and the reliability of clamping are ensured. Furthermore, the oil hole is formed in each copper pad, so that the lubrication can be kept for a long time during the machining of a machine tool, and the phenomenon of seizure is prevented.
In the invention, the diameter of the ejector rod is increased from the original 45mm to 70mm, so that the clamping rigidity is greatly increased, and the performance of the bracket is improved.
According to the invention, the cushion block is additionally arranged at the connecting part of the bracket and the rear part of the workpiece table, and a supporting point is additionally arranged during clamping, so that the supporting rigidity is more effectively improved.
Compared with the prior art, the invention adopts the mechanical clamping ejector rod, has good operability, high clamping stability and larger clamping force, can carry out pre-tightening, is suitable for clamping parts with different diameters and sizes, replaces a hydraulic shaft bracket and can greatly improve the processing efficiency of the rotor.
Drawings
FIG. 1 is a side view of a shaft bracket of the present invention;
FIG. 2 is a side cross-sectional view of the axle bracket of the present invention;
FIG. 3 is a front view of the axle bracket of the present invention;
FIG. 4 is an enlarged partial schematic view of the lower vertical pivot shaft of the second rotary drive mechanism of the present invention;
FIG. 5 is a schematic view of the connection of a second rotary drive mechanism of the present invention;
FIG. 6 is an enlarged, fragmentary schematic view of a third rotary drive mechanism of the present invention;
FIG. 7 is a schematic view of the third rotary drive mechanism of the present invention;
FIG. 8 is an enlarged partial schematic view of the pad segment of the present invention;
FIG. 9 is a schematic view of a work slide of the present invention;
fig. 10 is a schematic view showing the connection of the shaft bracket and the work slide table of the present invention.
In the drawing, 1 is a shaft bracket, 11 is a base body, 111 is a T-shaped slider, 112 is a cushion block, 12 is a bracket body, 1201 is a nut mandril, 1202 is a screw rod, 1203 is a copper pad, 121 is an upper clamping mandril, 122 is a lower clamping mandril, 123 is a middle clamping mandril, 124 is an arc-shaped bracket, 125 is a square pillow, 126 is a second rotary driving mechanism, 1261 is a lower vertical rotary shaft, 127 is a third rotary driving mechanism, 1271 is a middle vertical rotary shaft, 1272 is a first bevel gear, 1273 is a second bevel gear, 1274 is a middle horizontal rotary shaft, 128 is a gear set, 2 is a work sliding table, and 21 is a T-shaped guide groove.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
The utility model provides a large-scale screw rotor is axle bracket device for milling process, as shown in fig. 1 ~ 10, including two axle bracket 1 and a work slip table 2, the length direction of work slip table 2 is unanimous with screw rotor axial direction, two 1 left-right side of axle bracket set up on work slip table 2 side by side, and can adjust the distance on work slip table 2, axle bracket 1 includes the pedestal 11 with work slip table 2 looks adaptation and connects the bracket body 12 on pedestal 11, bracket body 12 has arc to hold in the palm groove 124 and follows a plurality of mechanical type centre gripping ejector pins that arc held in the palm groove 124 circumference and arranged, a plurality of mechanical type centre gripping ejector pins can follow arc and hold in the groove 124 radial direction flexible, as shown in fig. 1. In the embodiment, two shaft brackets 1 are erected on the working sliding table 2, the rotation center is away from the end face of the working sliding table by a large distance (for example, the distance can be 450mm, so that the requirement for processing a large screw rotor is met), and the shaft brackets 1 can slide relative to the working sliding table 2, so that the distance between the two shaft brackets 1 is adjusted. When the large-scale screw rotor clamping device works, the two shaft brackets 1 respectively clamp (support) shafts at two ends of the large-scale screw rotor.
In this embodiment, axle bracket 1 can slide and fasten in the optional position of work slip table 2 to be fit for processing the screw rotor work piece of different length, the accessible sets up rack mechanism, drives axle bracket 1 and slides on work slip table 2. The bracket body 12 may be an arcuate casting having a rectangular cross-section and a hollow interior, with the arcuate bracket 124 being located within the arcuate interior, and the arc center of the arcuate bracket 124 coinciding with the screw rotor shaft center during operation. In this embodiment, it is preferable that the opening of the arc bracket 124 faces forward, three mechanical clamping push rods are arranged along the circumference of the arc bracket 124, the centers of the shafts for adjusting the screw rotors are respectively an upper clamping mandril 121 arranged at the top end of an arc bracket 124, a lower clamping mandril 122 arranged at the bottom end of the arc bracket 124 and a middle clamping mandril 123 arranged between the upper clamping mandril 121 and the lower clamping mandril 122, the middle clamping mandril 123 is arranged along the horizontal direction, and towards the center of the opening of the arc bracket 124 (coinciding with the horizontal line passing through the center of the arc bracket 124), the included angle between the upper clamping mandril 121 and the middle clamping mandril 123 and the included angle between the lower clamping mandril 122 and the middle clamping mandril 123 are both larger than 90 degrees, the included angle between the upper clamping mandril 121 and the perpendicular line passing through the center of the arc-shaped bracket 124 is 4 degrees, and the included angle between the lower clamping mandril 122 and the perpendicular line passing through the center of the arc-shaped bracket 124 is 4 degrees; the upper clamping mandril 121, the middle clamping mandril 123 and the lower clamping mandril 122 are all composed of a nut mandril 1201 which is arranged in the bracket body 12 in a penetrating way and can slide along the axial direction and a screw rod 1202 which is arranged in the nut mandril 1201 in a penetrating way and is rotatably connected with the bracket body 12, as shown in fig. 2. This embodiment utilizes the mechanical type centre gripping ejector pin of lead screw structure to carry out the centre gripping to large-scale screw rotor, compares with hydraulic shaft bracket, and whole rigidity is effectively improved, can carry out certain pretension to the axle of large-scale screw rotor moreover, and the pretension is very helpful to the improvement of rough machining quality. Furthermore, the existing band-type brake (or band-type) mechanism or the self-locking screw rod can be adopted, so that the screw rod is prevented from being loosened by vibration during impact cutting processing. For example, in this embodiment, round holes perpendicular to the upper clamping ejector 121, the middle clamping ejector 123, and the lower clamping ejector 122 may be disposed beside the respective ejector, and a fastening and locking mechanism may be installed.
In this embodiment, because the working sliding table 2 and the operating space are limited, except that the upper clamping ejector rod 121 can directly rotate the screw rod to realize the extension and contraction of the ejector rod, the lower clamping ejector rod 122 and the middle clamping ejector rod 123 both drive the screw rod to rotate through the driving assembly formed by the transmission member to transmit the extension and contraction of the ejector rod. As shown in fig. 1 to 2, the upper pinching push-rod 121 is preferably connected to a first rotary drive mechanism, and the first rotary drive mechanism is preferably a square pillow 125 connected to the top end of a screw 1202 of the upper pinching push-rod 121. As shown in fig. 1, 2, 4 and 5 (fig. 5 is a front view perspective direction of the shaft bracket), the second rotation driving mechanism 126 is connected to the lower clamping push rod 122, and the second rotation driving mechanism 126 includes a lower vertical rotation shaft 1261 disposed at one side of the bracket body 12 and rotatably connected to the seat body 11, a square pillow 125 connected to a top end of the lower vertical rotation shaft 1261, and a gear set 128 for connecting the lower vertical rotation shaft 1261 and a screw 1202 of the lower clamping push rod 122. As shown in fig. 1, 2, 6 and 7 (fig. 7 is a view from above to below in fig. 1), the middle holding push rod 123 is connected with a third rotation driving mechanism 127, the third rotation driving mechanism 127 includes a middle vertical rotation shaft 1271 disposed at one side of the bracket body 12 and rotatably connected with the base body 11, a square pillow 125 connected to the top end of the middle vertical rotation shaft 1271, a first bevel gear 1272 sleeved on the middle vertical rotation shaft 1271, a second bevel gear 1273 perpendicular to the rotation shaft of the first bevel gear 1272, a middle horizontal rotation shaft 1274 penetrating through the second bevel gear 1273 and parallel to the screw rod 1202 of the middle holding push rod 123, and a gear set 128 for connecting the middle horizontal rotation shaft 1274 and the screw rod 1202 of the middle holding push rod 123. In this embodiment, the screw rod 1202 is rotated by a manual pulling method, and the space above the shaft bracket 1 enables the screw rod 1202 directly rotating the upper clamping mandril 121 to rotate, so that the top end of the screw rod 1202 of the upper clamping mandril 121 in this embodiment extends out from the top end of the bracket body of the shaft bracket 1 and is directly connected with a square pillow (a block with four side surfaces, which is convenient to be screwed by a manual pulling tool). And the lower part (with the work slipway) of the lower clamping mandril 122 and the rear part (behind the equipment) of the middle clamping mandril have no operation space, therefore, for the lower clamping mandril 122, the embodiment converts the rotary motion of the screw rod 1202 thereof into the rotary motion of the lower vertical rotating shaft 1261 positioned at one side of the bracket body 1 through a gear set (for example, a three-level gear) so as to enable the lower clamping mandril 122 to have the operation space, a square pillow is connected to the top part of the lower vertical rotating shaft 1261, and the rotary square pillow is transmitted through the gear set, so that the screw rod 1202 of the lower clamping mandril 122 rotates. For the middle clamping push rod 123, the present embodiment converts the rotation motion of the screw rod 1202 (axially along the horizontal direction) of the middle clamping push rod 123 into the rotation motion of the middle vertical rotation shaft 1271 (axially along the vertical direction) at one side of the bracket body 1 through a gear set and two bevel gears perpendicular to each other. Therefore, the rotation of the middle clamping ejector rod 123 has an operation space, the square pillow is connected to the top of the middle vertical rotating shaft 1271, and the square pillow is rotated to be transmitted through a bevel gear and a gear set, so that the screw rod 1202 of the middle clamping ejector rod 123 rotates. Through the conversion of the transmission mechanism, the adjustment of the mechanical clamping ejector rod of the embodiment has an adjustment space. The second rotary drive mechanism 126 and the third rotary drive mechanism 127 on the shaft bracket 1 on the left side are provided on the left side of the bracket body 12, and the second rotary drive mechanism 126 and the third rotary drive mechanism 127 on the shaft bracket 1 on the right side are provided on the right side of the bracket body 12 for easy operation. Further preferably, all the transmission components used in the present embodiment are provided with a lubricating oil passage, which facilitates subsequent maintenance.
As shown in fig. 2, a replaceable copper pad 1203 is preferably connected to an end of the nut stem 1201, and an end of the copper pad 1203 has an arc groove matching the shaft diameter of the large screw rotor. Further preferably, the copper pad 1203 is connected through a spigot interference fit, a key groove is rotationally positioned and is connected with the nut mandril 1201 in a mode of fixing through an inner hexagon screw, and a lubricating oil hole is formed in the copper pad 1203. In the embodiment, a method for replacing the copper pad is adopted, and the arc grooves meeting the requirements of different diameters are further processed on the copper pad, so that the clamping sizes of various diameters can be met, and the stability and the reliability of clamping are also ensured. Furthermore, the oil hole is formed in each copper pad, so that the lubrication can be kept for a long time during the machining of a machine tool, and the phenomenon of seizure is prevented. In this embodiment, a key slot is further formed on the outer circle of each ejector rod and is matched with a key arranged in a hole for accommodating the ejector rod to prevent the ejector rod from rotating.
In this embodiment, as shown in fig. 9, preferably, a plurality of T-shaped guide slots 21 are provided on the work slide table 2, and a plurality of sets of T-shaped sliders 111 matched with the T-shaped guide slots 21 are provided on the seat body 11 of the shaft bracket 1, and as shown in fig. 1 and 3, each set of T-shaped sliders 111 has two T-shaped sliders 111 (see fig. 3). Furthermore, in the embodiment, a cushion block is additionally arranged at the connecting position of the bracket and the rear part of the workpiece table, so that a supporting point is additionally arranged during clamping, and the supporting rigidity is more effectively improved. In practice, the bottom and back of the bracket body 12 and the joint surfaces of the sliding tables can be matched by scraping, the contact rate of the two parts can be ensured to be more than 90%, the two contact surfaces of the working sliding table 2 in the equipment ensure the linear consistency of the two parts, but the practice proves that the anti-seismic performance during powerful cutting cannot be completely ensured only by the joint of the two surfaces. Therefore, one binding surface is added at the bottom of the back binding surface to increase the rigidity of the whole bracket, and the bottom of the back binding surface is in a tapered iron structure in consideration of manufacturability while the contact rate of the bottom and the back of the bracket body 12 and the binding surface of the sliding table is ensured. In order to strengthen the weakest top end supporting part, a pressing point is additionally arranged at the root part of the arch rectangular column, through analysis of stress during rotor cutting, the bracket body 12 is most suitably pressed in the direction forming an included angle of 30 degrees with the horizontal plane at the point, meanwhile, the cantilever with the stressed top end is considered to be longer, the wall thickness is increased around the middle round hole, and the equal strength design is used for making up the stress. And the rest pressing points are all carried out according to the standard pressing positions of the sliding table.
In this embodiment, the diameter of ejector pin is improved to 70mm from original 45mm, greatly increased the centre gripping rigidity, improved bracket performance ability.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. The utility model provides a large-scale screw rod rotor milling is with axle bracket device, a serial communication port, including two axle bracket (1) and a work slip table (2), the length direction of work slip table (2) unanimous with screw rod rotor axial direction, two axle bracket (1) a left side and a right side erect on work slip table (2) side by side to can adjust the distance on work slip table (2), axle bracket (1) include pedestal (11) with work slip table (2) looks adaptation and connect bracket body (12) on pedestal (11), bracket body (12) have arc support groove (124) and along a plurality of mechanical type centre gripping ejector pins that arc support groove (124) circumference was arranged, a plurality of mechanical type centre gripping ejector pins can be followed arc support groove (124) radial direction and stretch out and draw back.
2. The shaft bracket device for milling large screw rotors according to claim 1,
the opening of the arc-shaped bracket (124) faces forwards, three mechanical clamping ejector rods are arranged along the circumferential direction of the arc-shaped bracket (124), namely an upper clamping ejector rod (121) arranged at the top end of the arc-shaped bracket (124), a lower clamping ejector rod (122) arranged at the bottom end of the arc-shaped bracket (124) and a middle clamping ejector rod (123) arranged between the upper clamping ejector rod (121) and the lower clamping ejector rod (122), the middle clamping ejector rod (123) is arranged along the horizontal direction and faces the center of the opening of the arc-shaped bracket (124), and the included angle between the upper clamping ejector rod (121) and the middle clamping ejector rod (123) and the included angle between the lower clamping ejector rod (122) and the middle clamping ejector rod (123) are both larger than 90 degrees;
the upper clamping ejector rod (121), the middle clamping ejector rod (123) and the lower clamping ejector rod (122) are respectively composed of a nut ejector rod (1201) which is arranged in the bracket body (12) in a penetrating way and can slide along the axial direction and a screw rod (1202) which is arranged in the nut ejector rod (1201) in a penetrating way and is rotatably connected with the bracket body (12).
3. The shaft bracket device for milling the large screw rotor according to claim 2, wherein the upper clamping mandril (121) is connected with a first rotary driving mechanism, and the first rotary driving mechanism is a square pillow (125) connected to the top end of a screw rod (1202) of the upper clamping mandril (121).
4. The spindle bracket device for milling large screw rotors according to claim 2, wherein the lower clamping mandril (122) is connected with a second rotary driving mechanism (126), and the second rotary driving mechanism (126) comprises a lower vertical rotating shaft (1261) which is arranged at one side of the bracket body (12) and is rotatably connected with the base body (11), a square pillow (125) which is connected with the top end of the lower vertical rotating shaft (1261), and a gear set (128) which is used for connecting the lower vertical rotating shaft (1261) and the screw rod (1202) of the lower clamping mandril (122).
5. The shaft bracket device for milling large screw rotors according to claim 2, it is characterized in that the middle clamping ejector rod (123) is connected with a third rotation driving mechanism (127), the third rotation driving mechanism (127) comprises a middle vertical rotating shaft (1271) which is arranged on one side of the bracket body (12) and is rotatably connected with the base body (11), a square pillow (125) which is connected with the top end of the middle vertical rotating shaft (1271), a first bevel gear (1272) which is sleeved on the middle vertical rotating shaft (1271), a second bevel gear (1273) which is vertical to the rotating shaft of the first bevel gear (1272), a middle horizontal rotating shaft (1274) which is arranged on the second bevel gear (1273) in a penetrating way and is parallel to a screw rod (1202) of the middle clamping ejector rod (123), and a gear set (128) which is used for connecting the middle horizontal rotating shaft (1274) and the screw rod (1202) of the middle clamping ejector rod (123).
6. The shaft bracket device for milling the large screw rotor as recited in claim 2, wherein the end of the nut mandril (1201) is connected with a replaceable copper pad (1203), and the end of the copper pad (1203) is provided with an arc groove matched with the shaft diameter of the large screw rotor.
7. The shaft bracket device for milling the large screw rotor as claimed in claim 6, wherein the copper pad (1203) is in interference fit connection with a spigot, a key groove is rotationally positioned and is connected with the nut mandril (1201) in a mode of being fixed by a hexagon socket head cap screw, and a lubricating oil hole is formed in the copper pad (1203).
8. The shaft bracket device for milling the large-scale screw rotor according to claim 1, wherein a plurality of T-shaped guide grooves (21) are arranged on the work sliding table (2), and a plurality of groups of T-shaped sliding blocks (111) matched with the T-shaped guide grooves (21) are arranged on the seat body (11) of the shaft bracket (1).
9. The shaft bracket device for milling of the large screw rotor according to claim 1, characterized in that a cushion block (112) is further arranged at the bottom of the seat body (11) and used for matching with the work sliding table (2) to support the shaft bracket (1).
10. The shaft bracket device for milling the large screw rotor according to claim 1, wherein the diameter of the mechanical clamping ejector rod is 70 mm.
CN202011018470.2A 2020-09-24 2020-09-24 Shaft bracket device for milling large screw rotor Pending CN112222883A (en)

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CN210633059U (en) * 2019-08-20 2020-05-29 南京康尼机电股份有限公司 Numerical control machine tool for machining double-lead special-shaped screw rod and automatically changing tool
CN211387712U (en) * 2019-08-21 2020-09-01 无锡恒信北石科技有限公司 Bracket for processing rotor of all-metal conical screw pump
CN210756456U (en) * 2019-11-04 2020-06-16 苏州市吴中喷丝板有限公司 Spinneret processing and positioning device
CN110935905A (en) * 2019-12-01 2020-03-31 江苏刘一刀精密机械有限公司 Drilling equipment for pipeline machining
CN111002083A (en) * 2020-01-08 2020-04-14 台州椒江云瑞机械设备技术开发有限公司 Turning follow tool rest capable of changing tools

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