CN114559278A - Hydraulic automatic centering positioning and clamping device - Google Patents
Hydraulic automatic centering positioning and clamping device Download PDFInfo
- Publication number
- CN114559278A CN114559278A CN202210133708.9A CN202210133708A CN114559278A CN 114559278 A CN114559278 A CN 114559278A CN 202210133708 A CN202210133708 A CN 202210133708A CN 114559278 A CN114559278 A CN 114559278A
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- positioning
- bevel gear
- push rod
- centering
- shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices 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
- B23Q3/06—Work-clamping means
- B23Q3/08—Work-clamping means other than mechanically-actuated
- B23Q3/082—Work-clamping means other than mechanically-actuated hydraulically actuated
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a hydraulic automatic centering positioning and clamping device which comprises a bottom plate, a driving mechanism, a centering positioning mechanism and a jacking mechanism, wherein the driving mechanism comprises a hydraulic motor, an input shaft and a first bevel gear, two ends of the input shaft are respectively and coaxially and fixedly connected with an output end of the hydraulic motor and the first bevel gear, the centering positioning mechanism comprises a second bevel gear and two centering positioning units, the second bevel gear is meshed with the first bevel gear, each centering positioning unit comprises an output shaft, the output shafts of the two centering positioning units are symmetrically arranged and coaxially fixed on two sides of the second bevel gear, each output shaft is provided with a threaded section, the thread directions of the threaded sections on the two output shafts are opposite, the jacking mechanism comprises two jacking units, and each jacking unit comprises a push rod, a push rod and a guide seat. The device uses hydraulic pressure as power, and a hydraulic motor as an execution element, can realize centering, positioning and clamping of workpieces, is time-saving and labor-saving, and is convenient for realizing automation of workpiece clamping.
Description
Technical Field
The invention relates to a part positioning and clamping device in machining, in particular to a hydraulic automatic centering positioning and clamping device.
Background
The parts are basic elements of mechanical equipment, metal cutting is not required for machining of the mechanical parts, and the tool clamp is one of the technological equipment with important guarantee of machining efficiency and machining quality. In machining, aiming at clamping of a part needing to be centered and positioned, a traditional tool clamp needs to be manually aligned and clamped, time and labor are wasted, and automation is difficult to realize. Especially, blank parts, because of its structure is irregular, the machining allowance is inhomogeneous, if alignment, clamping are improper, arouse the part offset very easily, increase the cutter loss, influence machining efficiency, can lead to the part unilateral machining allowance not enough when serious, cause the part to scrap.
Disclosure of Invention
The invention aims to solve the technical problem that in order to overcome the defects of the prior art, the hydraulic automatic centering, positioning and clamping device is provided, hydraulic is used as power, a hydraulic motor is used as an execution element, centering, positioning and clamping of workpieces can be realized, time and labor are saved, and workpiece clamping automation is facilitated.
The technical scheme adopted by the invention for solving the technical problems is as follows: a hydraulic automatic centering positioning and clamping device comprises a bottom plate, a driving mechanism, a centering positioning mechanism and a jacking mechanism, wherein the driving mechanism comprises a hydraulic motor, an input shaft and a first bevel gear, two ends of the input shaft are respectively coaxially and fixedly connected with an output end of the hydraulic motor and the first bevel gear, the centering positioning mechanism comprises a second bevel gear and two centering positioning units, the second bevel gear is meshed with the first bevel gear, each centering positioning unit comprises an output shaft, the output shafts of the two centering positioning units are symmetrically arranged and coaxially fixed on two sides of the second bevel gear, each output shaft is provided with a threaded section, the thread directions of the threaded sections on the two output shafts are opposite, the jacking mechanism comprises two jacking units, and each centering positioning unit is correspondingly provided with one jacking unit, each jacking unit comprises a push rod, ejector rods and a guide seat, the guide seats are fixed on the bottom plate, one end of each push rod is in threaded connection with a corresponding threaded section on one output shaft, the other end of each push rod is rotatably connected with one end of each ejector rod, the other end of each ejector rod penetrates through the guide seats in an inclined mode, and the other ends of the ejector rods of the two jacking units are used for jacking a workpiece to be machined from the inner side to the outer side.
The hydraulic automatic centering, positioning and clamping device takes hydraulic pressure as power and a hydraulic motor as an execution element, has the advantages of large clamping force, adjustable clamping force, capability of automatically controlling loosening and clamping actions, stable and reliable transmission and the like, can realize centering, positioning and clamping of workpieces, is time-saving and labor-saving, is convenient to realize automation of workpiece clamping, and can be used on machine tool equipment such as a horizontal machining center, a vertical machining center, a gantry machining center and the like.
When the hydraulic automatic centering and positioning clamping device is used, a plurality of supporting blocks for supporting a workpiece to be machined are fixed in the middle of a workbench of a machine tool, then a tool leaning block is fixed on one side of the workbench for side leaning guiding of the workpiece to be machined, and then a plurality of sets of the hydraulic automatic centering and positioning clamping device are fixed at positions of the workbench, which are located on the inner sides of the supporting blocks; after the hydraulic automatic centering and positioning clamping device is installed in place, finding the symmetric centers of the two ejector rods, and setting the symmetric centers as the origin of X-axis coordinates; the workpiece to be machined is stably hoisted to the supporting blocks, after the position of the workpiece is adjusted, the hydraulic motor works, the input shaft drives the first bevel gear and the second bevel gear to rotate, the two output shafts are further driven to rotate synchronously, the two output shafts move outwards synchronously, two sides of the two push rods are pushed out, and finally the workpiece is spread and clamped through the two push rods, so that the central line of the workpiece coincides with the origin of coordinates of the X axis, and the thrust force exerted on the two sides of the workpiece is consistent, so that the workpiece is automatically centered, positioned and clamped. After the machine tool finishes processing the workpiece, the hydraulic motor rotates reversely, the two ejector rods retract, and the workpiece is loosened.
Preferably, the output end of the hydraulic motor is connected with a first shaft sleeve through a flat key, one end of the input shaft is connected with the first shaft sleeve through a flat key, the other end of the input shaft is connected with the first bevel gear through a flat key, the input shaft is installed on two conical roller bearings which are installed in opposite directions, first bearing sleeves are installed on the outer sides of the two conical roller bearings, the first bearing sleeves are fixed on a gear box, and the gear box is fixed on the bottom plate.
Preferably, each output shaft is mounted on a single-direction thrust ball bearing and two angular contact ball bearings, a second bearing sleeve is mounted on the outer sides of the single-direction thrust ball bearing and the two angular contact ball bearings, the second bearing sleeve is fixed on the bottom plate, a loose ring of the single-direction thrust ball bearing is tightly matched with the second bearing sleeve, and a tight ring of the single-direction thrust ball bearing is tightly matched with the output shaft.
Preferably, the push rod is provided with a guide groove, the second bearing sleeve is fixed with a guide pin, and the end part of the guide pin extends into the guide groove. The guide pin is matched with the guide groove, so that a good guiding effect is achieved on the reciprocating movement of the push rod, and the reliability of the device can be further improved on the basis of the guide seat.
Preferably, the other end of the push rod is rotatably connected with one end of the ejector rod through a connecting mechanism, the connecting mechanism comprises a connecting shaft and a self-lubricating bearing, the ejector rod is provided with a waist-shaped hole, the connecting shaft penetrates through the waist-shaped hole and is fixed to the other end of the push rod through a nut and a thin nut, and the self-lubricating bearing is sleeved on the connecting shaft and is located on the inner side of the waist-shaped hole. The connecting mechanism is simple and reliable in structure, a certain moving space is reserved for the relative movement of the push rod and the ejector rod due to the design of the waist-shaped hole, the ejector rod is prevented from being clamped in the extending process, and the connecting mechanism is safe and reliable. The connecting shaft is fixed through double nuts consisting of the nuts and the thin nuts, and good mechanical fastening and anti-loosening effects are achieved.
Preferably, two ends of the first bevel gear are respectively provided with an elastic collar for a shaft and an adjusting pad, outer rings of the two tapered roller bearings are respectively fixed by a pressing ring and a pressing cover, inner rings of the two tapered roller bearings are respectively pressed by a spacing ring and the adjusting pad, and the spacing ring is locked and fixed by a locking nut. The thickness of the adjusting pad can be changed to adjust the meshing clearance between the first bevel gear and the second bevel gear, and the transmission precision is guaranteed.
Preferably, the thread of the thread section is a trapezoidal thread with a lead angle smaller than a friction angle, so that mechanical self-locking can be realized, the connection precision and reliability of the output shaft and the push rod are ensured, loosening is prevented, and the accuracy and reliability of centering positioning are ensured.
Compared with the prior art, the invention has the following advantages: the hydraulic automatic centering, positioning and clamping device solves the problems of automatic centering, positioning and clamping of workpiece clamping, has the advantages of large clamping force, adjustable clamping force, capability of automatically controlling loosening action, stable and reliable transmission and the like, is time-saving and labor-saving, can realize the automation of workpiece clamping, can realize the production and processing automation of workpieces by matching with a numerical control machine and a feeding and discharging mechanism, and can be used on machine tool equipment such as a horizontal processing center, a vertical processing center, a gantry processing center and the like. In addition, the hydraulic automatic centering and positioning clamping device is strong in universality, the number of the hydraulic automatic centering and positioning clamping devices can be flexibly selected and determined according to parts with different structures and different sizes, the jacking mechanism can be replaced to realize adaptation, and the pressure of a hydraulic system connected with a hydraulic motor can be adjusted according to different clamping force requirements.
Drawings
FIG. 1 is an external view of a hydraulic automatic centering and positioning clamping device in an embodiment;
FIG. 2 is a cross sectional schematic view of the hydraulic automatic centering and positioning clamping device in the embodiment;
FIG. 3 is an enlarged view taken at A in FIG. 2;
FIG. 4 is an enlarged view of FIG. 2 at B;
FIG. 5 is a cross-sectional view taken at C-C of FIG. 2;
FIG. 6 is an effect diagram of the hydraulic automatic centering, positioning and clamping device in the two embodiments after being fixed on the worktable of the machine tool;
FIG. 7 is a state diagram of a workpiece clamped by the hydraulic automatic centering and positioning clamping device in two embodiments.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The hydraulic automatic centering and positioning clamping device of the embodiment comprises a bottom plate 1, a driving mechanism, a centering and positioning mechanism and a jacking mechanism, wherein the driving mechanism comprises a hydraulic motor 21, an input shaft 22 and a first bevel gear 23, two ends of the input shaft 22 are respectively coaxially and fixedly connected with an output end of the hydraulic motor 21 and the first bevel gear 23, the centering and positioning mechanism comprises a second bevel gear 31 and two centering and positioning units, the second bevel gear 31 is meshed with the first bevel gear 23, each centering and positioning unit comprises an output shaft 32, the output shafts 32 of the two centering and positioning units are symmetrically arranged and coaxially fixed on two sides of the second bevel gear 31 through flat keys, each output shaft 32 is provided with a threaded section 33, in the embodiment, threads of the threaded sections 33 are trapezoidal threads with a thread lead angle smaller than a friction angle, and the thread directions of the threaded sections 33 on the two output shafts 32 are opposite, the tight mechanism in top includes two tight units in top, the locating unit correspondence is furnished with a tight unit in top in every branch, every tight unit in top includes push rod 41, ejector pin 42 and guide holder 43, guide holder 43 passes through the fix with screw on bottom plate 1, the one end of push rod 41 and the screw thread section 33 threaded connection on the output shaft 32 that corresponds, the other end of push rod 41 rotates through coupling mechanism and ejector pin 42's one end and is connected, the guide holder 43 is worn to the other end of ejector pin 42 to one side, the other end of the ejector pin 42 of two tight units in top is used for pushing up the work piece of treating the processing from inboard outside.
In this embodiment, the output end of the hydraulic motor 21 is connected with a first shaft sleeve 24 through a flat key, one end of the input shaft 22 is connected with the first shaft sleeve 24 through a flat key, the other end of the input shaft 22 is connected with a first bevel gear 23 through a flat key, the input shaft 22 is installed on two tapered roller bearings 25 which are installed in opposite directions, a first bearing sleeve 26 is installed on the outer sides of the two tapered roller bearings 25, the first bearing sleeve 26 is fixed on the gear box 11 through a screw, and the gear box 11 is fixed on the bottom plate 1 through a screw. Two ends of the first bevel gear 23 are respectively provided with a shaft circlip 27 and an adjusting pad 28, outer rings of the two tapered roller bearings 25 are respectively fixed by a pressing ring 29 and a gland 20, inner rings of the two tapered roller bearings 25 are respectively pressed by a space ring 51 and the adjusting pad 28, and the space ring 51 is locked and fixed by a locking nut 52.
In this embodiment, each output shaft 32 is installed in one single-direction thrust ball bearing 34 and two angular contact ball bearings 35, a second bearing sleeve 36 is installed on the outer sides of the single-direction thrust ball bearing 34 and the two angular contact ball bearings 35, the second bearing sleeve 36 is fixed on the base plate 1 through a screw, a loose ring of the single-direction thrust ball bearing 34 is tightly matched with the second bearing sleeve 36, and a tight ring of the single-direction thrust ball bearing 34 is tightly matched with the output shaft 32.
In this embodiment, the push rod 41 is provided with a guide groove 44, the second bearing sleeve 36 is fixed with a guide pin 37, and an end of the guide pin 37 extends into the guide groove 44.
In this embodiment, the connecting mechanism includes a connecting shaft 61 and a self-lubricating bearing 62, a waist-shaped hole 45 is provided on the ejector rod 42, the connecting shaft 61 penetrates through the waist-shaped hole 45 and is fixed at the other end of the push rod 41 through a nut 63 and a thin nut 64, and the self-lubricating bearing sleeve 62 is provided on the connecting shaft 61 and is located inside the waist-shaped hole 45.
Taking the workpiece 71 shown in fig. 7 as an example, when the hydraulic automatic centering and positioning and clamping device is used, firstly four support blocks 73 for supporting the workpiece 71 to be machined are fixed in the middle of a workbench 72 of a machine tool, then a tool rest block 74 is fixed on one side of the workbench 72 for side-leaning guiding the workpiece 71 to be machined, and then two sets of the hydraulic automatic centering and positioning and clamping devices (the bottom plate 1 is fixed on the workbench 72) are fixed at positions of the workbench 72, which are located inside the four support blocks 73, as shown in fig. 6; after the hydraulic automatic centering, positioning and clamping device is installed in place, finding the symmetric centers of the two ejector rods 42, and setting the symmetric centers as the origin of X-axis coordinates; the workpiece 71 to be machined is stably hoisted to the supporting blocks 73, after the position of the workpiece 71 is adjusted, the hydraulic motor 21 works, the input shaft 22 drives the first bevel gear 23 and the second bevel gear 31 to rotate, the two output shafts 32 are further driven to synchronously rotate, the two output shafts 32 synchronously move outwards, the two sides of the two push rods 41 are pushed out, and finally the workpiece 71 is spread and clamped through the two push rods 42, the state diagram at the moment is shown in fig. 7, so far, the central line of the workpiece 71 is superposed with the origin of coordinates of an X axis, and the thrust forces on the two sides of the workpiece 71 are consistent, and therefore, the workpiece 71 is automatically centered, positioned and clamped. After the machine tool finishes processing the workpiece 71, the hydraulic motor 21 rotates reversely, the two ejector rods 42 retract, and the workpiece 71 is loosened.
Claims (7)
1. A hydraulic automatic centering positioning and clamping device is characterized by comprising a bottom plate, a driving mechanism, a centering positioning mechanism and a jacking mechanism, wherein the driving mechanism comprises a hydraulic motor, an input shaft and a first bevel gear, two ends of the input shaft are respectively coaxially and fixedly connected with the output end of the hydraulic motor and the first bevel gear, the centering positioning mechanism comprises a second bevel gear and two centering positioning units, the second bevel gear is meshed with the first bevel gear, each centering positioning unit comprises an output shaft, the output shafts of the two centering positioning units are symmetrically arranged and coaxially fixed on two sides of the second bevel gear, each output shaft is provided with a threaded section, the thread directions of the threaded sections on the two output shafts are opposite, the jacking mechanism comprises two jacking units, each center-dividing positioning unit is correspondingly provided with one jacking unit, each jacking unit comprises a push rod, a push rod and a guide seat, the guide seat is fixed on the bottom plate, one end of the push rod is in threaded connection with a corresponding threaded section on an output shaft, the other end of the push rod is rotatably connected with one end of the push rod, the other end of the push rod penetrates through the guide seat in an inclined mode, and the other ends of the push rods of the two jacking units are used for jacking a workpiece to be machined from the inner side to the outer side.
2. The hydraulic automatic centering, positioning and clamping device according to claim 1, wherein the output end of the hydraulic motor is connected with a first shaft sleeve through a flat key, one end of the input shaft is connected with the first shaft sleeve through a flat key, the other end of the input shaft is connected with the first bevel gear through a flat key, the input shaft is mounted on two reversely mounted tapered roller bearings, a first bearing sleeve is mounted on the outer sides of the two tapered roller bearings, the first bearing sleeve is fixed on a gear box, and the gear box is fixed on the bottom plate.
3. The hydraulic automatic centering, positioning and clamping device according to claim 1, wherein each output shaft is mounted on a one-way thrust ball bearing and two angular contact ball bearings, a second bearing sleeve is mounted on the outer sides of the one-way thrust ball bearing and the two angular contact ball bearings, the second bearing sleeve is fixed on the base plate, a loose ring of the one-way thrust ball bearing is tightly matched with the second bearing sleeve, and a tight ring of the one-way thrust ball bearing is tightly matched with the output shaft.
4. The hydraulic automatic centering, positioning and clamping device as claimed in claim 3, wherein a guide groove is formed in the push rod, a guide pin is fixed on the second bearing sleeve, and an end of the guide pin extends into the guide groove.
5. The hydraulic automatic centering, positioning and clamping device according to claim 1, wherein the other end of the push rod is rotatably connected with one end of the push rod through a connecting mechanism, the connecting mechanism comprises a connecting shaft and a self-lubricating bearing, the push rod is provided with a waist-shaped hole, the connecting shaft is arranged in the waist-shaped hole in a penetrating manner and fixed at the other end of the push rod through a nut and a thin nut, and the self-lubricating bearing is sleeved on the connecting shaft and positioned inside the waist-shaped hole.
6. The hydraulic automatic centering, positioning and clamping device according to claim 1, wherein two ends of the first bevel gear are respectively provided with an elastic collar for a shaft and an adjusting pad, outer rings of the two tapered roller bearings are respectively fixed by a pressing ring and a pressing cover, inner rings of the two tapered roller bearings are respectively pressed by a spacer ring and the adjusting pad, and the spacer ring is locked and fixed by a lock nut.
7. The hydraulic automatic centering and positioning clamp device according to claim 1, wherein the thread of the thread section is a trapezoidal thread with a lead angle smaller than a friction angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210133708.9A CN114559278B (en) | 2022-02-14 | 2022-02-14 | Hydraulic automatic centering positioning and clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210133708.9A CN114559278B (en) | 2022-02-14 | 2022-02-14 | Hydraulic automatic centering positioning and clamping device |
Publications (2)
| Publication Number | Publication Date |
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| CN114559278A true CN114559278A (en) | 2022-05-31 |
| CN114559278B CN114559278B (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210133708.9A Active CN114559278B (en) | 2022-02-14 | 2022-02-14 | Hydraulic automatic centering positioning and clamping device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012196738A (en) * | 2011-03-22 | 2012-10-18 | Star Techno Co Ltd | Workpiece supporting device |
| CN203751367U (en) * | 2014-03-17 | 2014-08-06 | 江西奈尔斯西蒙斯赫根赛特中机有限公司 | Hydraulic automatic centering chuck with three claws |
| CN212351937U (en) * | 2020-06-06 | 2021-01-15 | 深圳市天阳谷科技发展有限公司 | Automatic centering device for processing aspheric lens |
| CN213531681U (en) * | 2020-09-28 | 2021-06-25 | 广东科杰机械自动化有限公司 | Automatic centering clamp |
| CN113649838A (en) * | 2021-09-24 | 2021-11-16 | 武汉联塑精密模具有限公司 | Anchor clamps and clamping system in batches are divided on four sides |
-
2022
- 2022-02-14 CN CN202210133708.9A patent/CN114559278B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012196738A (en) * | 2011-03-22 | 2012-10-18 | Star Techno Co Ltd | Workpiece supporting device |
| CN203751367U (en) * | 2014-03-17 | 2014-08-06 | 江西奈尔斯西蒙斯赫根赛特中机有限公司 | Hydraulic automatic centering chuck with three claws |
| CN212351937U (en) * | 2020-06-06 | 2021-01-15 | 深圳市天阳谷科技发展有限公司 | Automatic centering device for processing aspheric lens |
| CN213531681U (en) * | 2020-09-28 | 2021-06-25 | 广东科杰机械自动化有限公司 | Automatic centering clamp |
| CN113649838A (en) * | 2021-09-24 | 2021-11-16 | 武汉联塑精密模具有限公司 | Anchor clamps and clamping system in batches are divided on four sides |
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| Publication number | Publication date |
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| CN114559278B (en) | 2023-02-24 |
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