CN112338580A - Variable-diameter three-point centering device - Google Patents
Variable-diameter three-point centering device Download PDFInfo
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- CN112338580A CN112338580A CN202011222776.XA CN202011222776A CN112338580A CN 112338580 A CN112338580 A CN 112338580A CN 202011222776 A CN202011222776 A CN 202011222776A CN 112338580 A CN112338580 A CN 112338580A
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- block
- guide
- wedge
- fixedly connected
- guide plate
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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
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Abstract
The invention discloses a diameter-variable three-point centering device in the technical field of lathe processing, which comprises an inner guide plate fixed on a machine tool, wherein the left end of the inner guide plate is connected with an outer baffle plate, the upper part and the lower part of the inner guide plate are respectively connected with an upper inclined wedge and a lower inclined wedge which can slide in the height direction and are oppositely arranged, the upper inclined wedge extending out of the outer baffle plate is connected with an upper clamping block, the lower inclined wedge extending out of the outer baffle plate is connected with a lower clamping block, the inner guide plate is slidably connected with a movable block and a middle transmission slide block which can move left and right, the middle transmission slide block extending out of the outer baffle plate is connected with a side clamping block, linear drivers are fixedly connected on the inner guide plate above the upper inclined wedge and below the lower inclined wedge, the linear drivers are connected with driving rods extending out in the direction far away from the outer baffle plate, the outer ends, one inward end of the push rod beam is connected with the moving block; the invention can realize automatic positioning and has high efficiency.
Description
Technical Field
The invention belongs to the technical field of lathe machining, and particularly relates to a three-point centering device with a variable diameter.
Background
The center frame is generally used as an auxiliary positioning and clamping tool and widely applied to lathes, when the lathes process some long shaft workpieces with weak rigidity, in order to avoid the vibration and deformation phenomena generated after the workpieces are influenced by cutting force and self gravity and improve the processing quality of the surfaces of the workpieces, the center frame is required to be used for auxiliary positioning and clamping, however, the positioning diameter of the traditional center frame is fixed at present, auxiliary positioning is difficult to perform on some bent levers or slender shafts with conicity, and when longer shaft workpieces are processed, the position of the center frame needs to be adjusted for many times and positioning and clamping are performed again, so that the processing efficiency is greatly influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problem of difficult positioning and clamping in the prior art, and provides a three-point centering device with a variable diameter.
The purpose of the invention is realized as follows: a three-point centering device with variable diameter comprises an inner guide plate fixed on a machine tool, wherein the left end of the inner guide plate is connected with an outer baffle plate, the upper part and the lower part of the inner guide plate are respectively connected with an upper inclined wedge and a lower inclined wedge which can slide in the height direction and are oppositely arranged, the upper inclined wedge extending out of the outer baffle plate is connected with an upper clamping block, the lower inclined wedge extending out of the outer baffle plate is connected with a lower clamping block, a movable block capable of moving left and right and a middle transmission slide block are slidably connected on the inner guide plate, a side clamping block is connected on the middle transmission slide block extending out of the outer baffle plate, linear drivers are fixedly connected on the inner guide plate above the upper inclined wedge and below the lower inclined wedge, the linear driver is connected with driving rods extending towards the direction far away from the outer baffle, the outer ends of the two driving rods are connected with push rod cross beams, and the inward ends of the push rod cross beams are connected with moving blocks.
In the invention, the upper part and the lower part of an outer baffle are respectively provided with an outer guide port, the outer baffle between the two outer guide ports is provided with a middle guide port, an upper inclined wedge and a lower inclined wedge respectively lift along the upper outer guide port and the lower outer guide port, and a side clamping block moves left and right along the middle guide port; the linear driver acts to enable the driving rod to move leftwards, the upper portion of the moving block pushes the upper inclined wedge to move upwards, the lower portion of the moving block pushes the lower inclined wedge to move downwards, the middle transmission sliding block moves rightwards under the action of the upper inclined wedge and the lower inclined wedge, and the upper clamping block moves upwards. The lower clamping block and the side clamping block are opened; when a workpiece needs to be clamped, the linear driver reversely acts, the driving rod moves rightwards, the driving rod pushes the push rod cross beam to move rightwards, the push rod cross beam drives the moving block to move rightwards, the moving block drives the upper wedge to move downwards and the lower wedge to move upwards, the middle transmission sliding block moves leftwards under the action of the upper wedge and the lower wedge until the workpiece is clamped by the upper clamping block, the lower clamping block and the side clamping blocks, and the linear driver stops acting; the invention has reliable structure, can automatically position and clamp the workpiece, does not need to clamp again in the working process, improves the processing efficiency, and can be applied to the positioning work when the rod piece is processed.
In order to further realize the lifting of the upper wedge and the lower wedge, one upward end of the moving block is fixedly connected with an upper inclined plane guide block, the upper inclined plane guide block is slidably connected with one downward end of the upper wedge, one downward end of the moving block is fixedly connected with a lower inclined plane guide block, the lower inclined plane guide block is slidably connected with one upward end of the lower wedge, the upper part of the middle transmission slide block is slidably connected with the other downward end of the upper wedge, and the lower part of the middle transmission slide block is slidably connected with the other upward end of the lower wedge.
In order to further realize the movement of the moving block, a sliding groove is formed in the push rod cross beam, a connecting groove is formed in one end, opposite to the push rod cross beam, of the moving block, the push rod cross beam can extend into the connecting groove, a connecting hole is formed in the moving block, and the connecting pin penetrates through the connecting hole and the sliding groove in sequence to connect the moving block and the push rod cross beam together.
In order to further improve the lifting reliability of the upper wedge and the lower wedge, the upper part and the upper part of one side of the moving block, which is arranged relative to the push rod beam, are respectively and fixedly connected with guide rod supporting blocks, guide rods which are horizontally arranged are connected onto the guide rod supporting blocks, a return spring is sleeved on each guide rod, two guide seats which are arranged at intervals in the height direction are fixedly connected onto the inner guide plate, guide holes are formed in the guide seats, the guide rods can horizontally slide along the guide seats through the guide holes, one end of the return spring is connected with the guide rod supporting blocks, and the other end of the return spring is connected with the guide seats.
In order to further improve the horizontal movement stability of the middle transmission sliding block, a moving groove is formed in one side, opposite to the outer baffle, of the moving block, the middle transmission block can be inserted into the moving groove, a horizontal sliding seat is fixedly connected to the inner guide plate, a horizontal sliding block is fixedly connected to the inward side of the middle transmission sliding block, and the horizontal sliding block is connected to the horizontal sliding block in a sliding mode.
In order to further improve the reliability that goes up the slide wedge and go up and down the slide wedge lift, the upper portion fixedly connected with of interior deflector goes up the fixing base, and the lower part fixedly connected with of interior deflector goes up the fixing base down, it has last lift groove to go up to open on the fixing base, it has lower lift groove to open on the fixing base down, goes up the fixing base and is connected with the top shoe through going up lift groove slidable, and lower fixing base is connected with down the slider through going up lift groove slidable, go up slide wedge and top shoe fixed connection, slide wedge and lower slider fixed connection down.
As a further improvement of the present invention, the upper wedge and the lower wedge are symmetrically disposed about the center of the moving block in the height direction, and the perpendicular bisectors of the upper clamping block, the lower clamping block, and the side clamping block always intersect at one point.
In order to further improve the reliability of the horizontal movement of the moving block, two horizontal guide rails which are arranged at intervals in the height direction are fixedly connected to the inner guide plate, and the moving block is slidably connected to the guide rails.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a first three-dimensional structure diagram of the three clamping blocks in an open state.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a second perspective view of the three clamping blocks in the open state of the invention.
Fig. 5 is a partially enlarged view of B in fig. 4.
Fig. 6 is a three-dimensional structure diagram of the three clamping blocks in the open state.
Fig. 7 is a perspective view showing a configuration of three holding blocks in the present invention when retracted.
The automatic feeding device comprises a moving block 1, a lower inclined plane guide block 2, a lower inclined plane wedge 3, a lower clamping block 4, a side clamping block 5, an upper clamping block 6, an upper inclined plane wedge 7, an intermediate transmission slide block 8, an upper inclined plane guide block 9, a linear driver 10, a driving rod 11, a guide seat 12, a push rod cross beam 13, an outer guide opening 14, an intermediate guide opening 15, a guide rod support block 16, a return spring 17, a guide rod 18, an outer baffle 19, an inner guide plate 20, a horizontal slide block 21, a horizontal slide block 22, a connecting pin 23, a sliding groove 24, a lower fixed seat 25, a lower slide block 26, an upper fixed seat 27 and an upper slide block 28.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 7, a variable diameter three-point centering device comprises an inner guide plate 20 fixed on a machine tool, an outer baffle plate 19 connected to the left end of the inner guide plate 20, an upper wedge 7 and a lower wedge 2 which are slidably disposed in the height direction and are opposite to each other, respectively connected to the upper portion and the lower portion of the inner guide plate 20, an upper clamping block 6 connected to the upper wedge 7 extending out of the outer baffle plate 19, a lower clamping block 4 connected to the lower wedge 2 extending out of the outer baffle plate 19, a movable block 1 and an intermediate transmission slide block 8 which are movable in the left-right direction and slidably connected to the inner guide plate 20, in order to further improve the reliability of the horizontal movement of the movable block 1, two horizontal guide rails which are disposed at intervals in the height direction are fixedly connected to the inner guide plate 20, the movable block 1 is slidably connected to the guide rails, a side clamping block 5 connected to the intermediate transmission slide block 8 extending out of the, the linear driver 10 is fixedly connected to the inner guide plate 20 above the upper inclined wedge 7 and below the lower inclined wedge 2, the driving rods 11 extending towards the direction away from the outer baffle plate 19 are connected to the linear driver 10, the outer ends of the two driving rods 11 are connected with the push rod cross beam 13, and one inward end of the push rod cross beam 13 is connected with the moving block 1.
In order to further realize the lifting of the upper inclined wedge 7 and the lower inclined wedge 2, one upward end of the moving block 1 is fixedly connected with an upper inclined plane guide block 9, the upper inclined plane guide block 9 is slidably connected with one downward end of the upper inclined wedge 7, one downward end of the moving block 1 is fixedly connected with a lower inclined plane guide block 2, the lower inclined plane guide block 2 is slidably connected with one upward end of the lower inclined wedge 2, the upper part of the middle transmission slide block 8 is slidably connected with the other downward end of the upper inclined wedge 7, and the lower part of the middle transmission slide block 8 is slidably connected with the other upward end of the lower inclined wedge 2; fixing base 27 on the upper portion fixedly connected with of interior deflector 20, fixing base 25 under the lower part fixedly connected with of interior deflector 20, it has last lift groove to go up to open on fixing base 27, and it has lower lift groove to open on lower fixing base 25, goes up fixing base 27 and is connected with upper sliding block 28 through going up lift groove slidable, and lower fixing base 25 is connected with lower slider 26 through going up lift groove slidable, goes up slide wedge 7 and upper slider 28 fixed connection, lower slide wedge 2 and lower slider 26 fixed connection.
In order to further realize the movement of the moving block 1, a sliding groove 24 is formed in the push rod beam 13, a connecting groove is formed in one end, opposite to the push rod beam 13, of the moving block 1, the push rod beam 13 can extend into the connecting groove, a connecting hole is formed in the moving block 1, the moving block 1 and the push rod beam 13 are connected together by using a connecting pin 23 to sequentially penetrate through the connecting hole and the sliding groove 24, a guide rod supporting block 16 is fixedly connected to the upper portion of one side, opposite to the push rod beam 13, of the moving block 1 respectively, a guide rod 18 horizontally arranged is connected to the guide rod supporting block 16, a return spring 17 is sleeved on the guide rod 18, two guide seats 12 arranged at intervals in the height direction are fixedly connected to the inner guide plate 20, a guide hole is formed in each guide seat 12, the guide rod 18 can horizontally slide along the guide seats 12 through the guide hole, one end of the return spring 17; the moving block 1 is provided with a moving groove at one side opposite to the outer baffle plate 19, the middle transmission block can be inserted into the moving groove, the inner guide plate 20 is fixedly connected with a horizontal sliding seat 22, the inward side of the middle transmission slide block 8 is fixedly connected with a horizontal slide block 21, and the horizontal slide block 21 is slidably connected on the horizontal slide block 21.
The inclined wedges and the lower inclined wedges 2 are symmetrically arranged relative to the center of the moving block 1 in the height direction, and the perpendicular bisectors of the upper clamping block 6, the lower clamping block 4 and the side clamping block 5 are always intersected at one point.
In the invention, the upper part and the lower part of an outer baffle plate 19 are respectively provided with an outer guide opening 14, the outer baffle plate 19 between the two outer guide openings 14 is provided with a middle guide opening 15, an upper inclined wedge 7 and a lower inclined wedge 2 respectively lift along the upper outer guide opening 14 and the lower outer guide opening 14, a side clamping block 5 moves left and right along the middle guide opening 15, and a linear driver 10 is an electric push rod; firstly, an inner guide plate 20 is installed and fixed on a machine tool guide rail and is matched with a tool changing frame at the same time, so that the inner guide plate can slide along the machine tool guide rail along with a turning tool, before the inner guide plate is used, a linear driver 10 acts to enable a driving rod 11 to move leftwards, when the rightmost end of a sliding chute 24 is contacted with a connecting pin 23, a push rod beam 13 pushes a moving block 1 to move leftwards, a reset spring 17 is in a stretching state, an upper inclined wedge 7 and a lower inclined wedge 2 respectively move upwards and downwards under the action of the moving block 1, an intermediate transmission block moves rightwards under the action of the upper inclined wedge 7 and the lower inclined wedge 2, and an upper clamping block 6, a lower clamping block 4; when a workpiece needs to be positioned and clamped, the linear driver 10 reversely acts, the driving rod 11 extends outwards, the moving block 1 is reset under the action of the reset spring 17, the moving block 1 moves rightwards, the upper wedge 7 moves downwards, the upper wedge 7 moves upwards, the intermediate transmission slide block 8 moves leftwards, if the reset spring 17 is reset or can clamp the workpiece, the position of the push rod cross beam 13 is adjusted, the leftmost end of the sliding groove 24 is contacted with the connecting pin 23, if the reset spring 17 cannot clamp the workpiece after being reset, the linear driver 10 continuously reversely acts, and when the leftmost end of the sliding groove 24 is contacted with the connecting pin 23, the push rod cross beam 13 pulls the moving block 1 to move rightwards, the reset spring 17 compresses, and when the workpiece is clamped, the linear driver 10 stops acting; in the machining process, if the contour radius of a workpiece is enlarged, the linear driver 10 acts to enable the driving rod 11 to move leftwards, the moving block 1 moves leftwards under the action of the return spring 17, the upper clamping block 6, the lower clamping block 4 and the side clamping block 5 automatically expand, the position of the driving rod 11 is controlled, and the three clamping blocks are always in a clamping state; if the contour radius of the workpiece is reduced, the linear driver 10 continues to act reversely, the driving rod 11 moves rightwards, the push rod cross beam 13 pulls the moving block 1 to move rightwards through the connecting pin 23, and when the workpiece is clamped, the linear driver 10 stops acting; the automatic clamping device is ingenious in structure, the actions of automatic positioning and clamping of the workpiece and external driving, positioning and clamping are combined, the process time of repeated clamping and positioning is saved, and the production efficiency is greatly improved; the method can be applied to the work of positioning the workpiece during machining.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts based on the disclosed technical solutions, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (8)
1. A three-point centering device with variable diameter is characterized by comprising an inner guide plate fixed on a machine tool, wherein the left end of the inner guide plate is connected with an outer baffle plate, the upper part and the lower part of the inner guide plate are respectively connected with an upper wedge and a lower wedge which can slide in the height direction and are oppositely arranged, the upper wedge extending out of the outer baffle plate is connected with an upper clamping block, the lower wedge extending out of the outer baffle plate is connected with a lower clamping block, the inner guide plate is slidably connected with a movable block and a middle transmission slide block which can move left and right, the middle transmission slide block extending out of the outer baffle plate is connected with a side clamping block, linear drivers are fixedly connected on the inner guide plate above the upper wedge and below the lower wedge, the linear drivers are connected with driving rods extending in the direction far away from the outer baffle plate, the outer ends of the two driving rods are connected with a push rod beam, and one inward end of the push rod cross beam is connected with the moving block.
2. The variable diameter three-point centering device according to claim 1, wherein an upper inclined guide block is fixedly connected to an upward end of the moving block, the upper inclined guide block is slidably connected to a downward end of the upper inclined wedge, a lower inclined guide block is fixedly connected to a downward end of the moving block, the lower inclined guide block is slidably connected to an upward end of the lower inclined wedge, an upper portion of the intermediate transmission slide block is slidably connected to a downward end of the upper inclined wedge, and a lower portion of the intermediate transmission slide block is slidably connected to an upward end of the lower inclined wedge.
3. The variable diameter three-point centering device as claimed in claim 2, wherein the push rod cross member is formed with a sliding groove, the moving block is formed with a connecting groove at an end thereof opposite to the push rod cross member, the push rod cross member is extendable into the connecting groove, the moving block is formed with a connecting hole, and the moving block and the push rod cross member are connected together by a connecting pin sequentially passing through the connecting hole and the sliding groove.
4. The variable-diameter three-point centering device according to claim 3, wherein a guide rod support block is fixedly connected to an upper portion and an upper portion of one side of the moving block, which is opposite to the push rod beam, respectively, the guide rod support block is connected with a horizontally arranged guide rod, a return spring is sleeved on the guide rod, two guide seats are fixedly connected to the inner guide plate, the two guide seats are arranged at intervals in the height direction, guide holes are formed in the guide seats, the guide rod can horizontally slide along the guide seats through the guide holes, one end of the return spring is connected with the guide rod support block, and the other end of the return spring is connected with the guide seats.
5. A variable diameter three-point centering device as claimed in claim 3, wherein the movable block has a moving groove formed on a side thereof opposite to the outer retainer, the intermediate transmission block is inserted into the moving groove, a horizontal sliding base is fixedly connected to the inner guide plate, and a horizontal sliding block is fixedly connected to an inward side of the intermediate transmission block and slidably connected to the horizontal sliding block.
6. A three-point centering device with variable diameter according to any of claims 1 to 5, wherein the upper portion of the inner guide plate is fixedly connected with an upper fixing base, the lower portion of the inner guide plate is fixedly connected with a lower fixing base, the upper fixing base is provided with an upper lifting groove, the lower fixing base is provided with a lower lifting groove, the upper fixing base is slidably connected with an upper sliding block through the upper lifting groove, the lower fixing base is slidably connected with a lower sliding block through the lower lifting groove, the upper wedge is fixedly connected with the upper sliding block, and the lower wedge is fixedly connected with the lower sliding block.
7. A three-point centering device with variable diameter according to any of claims 1 to 5, wherein said upper and lower wedges are symmetrically disposed about the center of the moving block in the height direction, and the perpendicular bisectors of the upper, lower and side blocks always intersect at a single point.
8. A three-point centering device with variable diameter according to any one of claims 1 to 5, wherein two horizontal guide rails are fixedly connected to the inner guide plate at intervals in the height direction, and the moving block is slidably connected to the guide rails.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011222776.XA CN112338580B (en) | 2020-11-05 | 2020-11-05 | Variable-diameter three-point centering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011222776.XA CN112338580B (en) | 2020-11-05 | 2020-11-05 | Variable-diameter three-point centering device |
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| Publication Number | Publication Date |
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| CN112338580A true CN112338580A (en) | 2021-02-09 |
| CN112338580B CN112338580B (en) | 2022-08-19 |
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| CN202011222776.XA Active CN112338580B (en) | 2020-11-05 | 2020-11-05 | Variable-diameter three-point centering device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292224A (en) * | 2021-04-19 | 2021-08-24 | 信义节能玻璃（芜湖）有限公司 | Glass processing melting system |
| CN114749545A (en) * | 2022-04-19 | 2022-07-15 | 温州华成封头制造有限公司 | Groove automatic machining auxiliary mechanism based on intelligent machining of elliptical seal head |
| CN115229538A (en) * | 2022-08-10 | 2022-10-25 | 衡阳市精峰机械有限公司 | Cast iron rocker arm seat double-sided double-positioning tool |
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| SU984798A1 (en) * | 1981-07-31 | 1982-12-30 | Специальное Конструкторское Бюро Агрегатных Станков | Wedge plunger power mechanism |
| CN101116954A (en) * | 2007-08-24 | 2008-02-06 | 湖南大学 | Autotracking centring clamping device for numerically controlled grinder |
| CN109176569A (en) * | 2018-10-10 | 2019-01-11 | 苏州经贸职业技术学院 | A kind of automatic aligning manipulator |
| CN109333572A (en) * | 2018-10-25 | 2019-02-15 | 台州市良曜成套设备有限公司 | A kind of manipulator |
| CN211841090U (en) * | 2020-04-08 | 2020-11-03 | 天津中德应用技术大学 | Clamp for bearing machining |
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2020
- 2020-11-05 CN CN202011222776.XA patent/CN112338580B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU984798A1 (en) * | 1981-07-31 | 1982-12-30 | Специальное Конструкторское Бюро Агрегатных Станков | Wedge plunger power mechanism |
| CN101116954A (en) * | 2007-08-24 | 2008-02-06 | 湖南大学 | Autotracking centring clamping device for numerically controlled grinder |
| CN109176569A (en) * | 2018-10-10 | 2019-01-11 | 苏州经贸职业技术学院 | A kind of automatic aligning manipulator |
| CN109333572A (en) * | 2018-10-25 | 2019-02-15 | 台州市良曜成套设备有限公司 | A kind of manipulator |
| CN211841090U (en) * | 2020-04-08 | 2020-11-03 | 天津中德应用技术大学 | Clamp for bearing machining |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292224A (en) * | 2021-04-19 | 2021-08-24 | 信义节能玻璃（芜湖）有限公司 | Glass processing melting system |
| CN114749545A (en) * | 2022-04-19 | 2022-07-15 | 温州华成封头制造有限公司 | Groove automatic machining auxiliary mechanism based on intelligent machining of elliptical seal head |
| CN114749545B (en) * | 2022-04-19 | 2022-09-16 | 温州华成封头制造有限公司 | Groove automatic processing auxiliary mechanism based on intelligent processing of elliptical seal head |
| CN115229538A (en) * | 2022-08-10 | 2022-10-25 | 衡阳市精峰机械有限公司 | Cast iron rocker arm seat double-sided double-positioning tool |
| CN115229538B (en) * | 2022-08-10 | 2023-08-29 | 衡阳市精峰机械有限公司 | Double-sided double-positioning tool for cast iron rocker arm seat |
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| CN112338580B (en) | 2022-08-19 |
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