CN114559273B - Automatic clamping mechanism for heavy cylindrical workpiece - Google Patents

Abstract

The invention provides an automatic clamping mechanism for a heavy cylindrical workpiece, which comprises the following components: the middle of the rack is provided with a clamping component; a workpiece; the clamping assembly comprises a lateral clamping piece and a longitudinal clamping piece; the invention provides a lateral clamping piece and a longitudinal clamping piece, wherein the lateral clamping piece comprises a turntable with a spiral groove on the upper surface, a plurality of clamping pieces embedded into the spiral groove, and a first motor with a bevel gear for driving the turntable to rotate.

Description

Automatic clamping mechanism for heavy cylindrical workpiece

Technical Field

The invention belongs to the field of clamps, and particularly relates to an automatic clamping mechanism for a heavy cylindrical workpiece.

Background

In equipment manufacturing enterprises, two types of equipment processing equipment are required: a machine part or a workblank is manufactured by adopting a mechanical manufacturing method, and the machine part or the workblank comprises a machine body and process equipment: the product is manufactured by matching with the tools used by the processing equipment, mainly comprises a cutter, a clamp, a die, a measuring tool and the like, and is a material technical guarantee for ensuring the quality of the product, implementing the technical rules and improving the productivity, so that the design and the adoption of advanced technical equipment are necessary routes for upgrading the production technology, and one of the key common structure and the transmission problem is the design and the manufacture of large-scale cylindrical parts and transmission pairs for the equipment manufacturing industry.

Based on the above description, the inventor finds that the existing automatic clamping mechanism for heavy cylindrical workpieces mainly has the following defects:

circular knitting machines are the core technical equipment of the modern textile industry, in which the needle cylinder is a critical component, which is not only bulky and heavy, but also requires high machining precision and productivity. In actual production, the device is usually placed on a rotary workbench in a way of lifting by people, a crown block and the like, and is aligned and clamped by a plurality of pressing plates by means of a dial indicator, and the device has the outstanding problems that:

the clamping in the needle cylinder processing process in the existing circular knitting machine usually adopts a manual positioning mode to calibrate and clamp, if the clamping mode is adopted, positioning and alignment are time-consuming and labor-consuming, positioning accuracy consistency is poor, positioning accuracy depends on the technical level of operators, and therefore machining efficiency is limited.

Disclosure of Invention

In order to solve the technical problems, the invention provides an automatic clamping mechanism for a heavy cylindrical workpiece, which aims to solve the existing problems.

Aiming at the defects of the prior art, the invention discloses a heavy cylindrical workpiece automatic clamping mechanism, which aims at achieving the purposes and effects by the following specific technical means: an automatic clamping mechanism for a heavy cylindrical workpiece, comprising: the middle of the rack is provided with a clamping component;

a workpiece;

the clamping assembly comprises a lateral clamping piece and a longitudinal clamping piece;

the lateral clamping piece comprises a rotary table with a spiral groove on the upper surface, a plurality of clamping pieces embedded in the spiral groove, a fixed ring with a plurality of guide grooves and a first motor with a bevel gear, wherein the first motor drives the rotary table to rotate;

the longitudinal clamping piece comprises a clamping rod with a clamping plate and a second motor with a round table roller, the second motor drives the clamping rod and is provided with a spiral groove, a transverse guide groove is formed at the joint of the frame and the clamping rod, and the round table roller is driven to enable the clamping rod inserted into the spiral groove to move obliquely left and right along the transverse guide groove so as to longitudinally position and clamp the workpiece;

the controller is electrically connected with the lateral clamping piece and the longitudinal clamping piece, and controls the lateral clamping piece to clamp the workpiece and then controls the longitudinal clamping piece to clamp the workpiece.

Preferably, the inner side surface of the clamping piece and the lower part of the clamping plate are respectively provided with a sinking groove, and a pressure sensor is embedded in the sinking groove and used for keeping the optimal pressing of the workpiece.

Preferably, a spring is arranged in the thread groove in the turntable, and the spring in the contact area of the turntable and the clamping piece abuts against the clamping piece.

Preferably, a follower bracket is arranged below the workpiece, a groove matched with the follower bracket is formed in the fixing ring, and the groove is used for assisting the follower bracket to yield so as to maximize the contact surface between the workpiece and the clamping piece.

Preferably, a supporting disc is arranged in the middle of the fixed ring, and a hydraulic telescopic assembly is arranged below the supporting disc and used for lifting the following bracket, so that a workpiece can enter the clamping area.

Preferably, the rack is further provided with a first rocker pushing mechanism and a third motor for driving the first rocker pushing mechanism at two sides of the clamping assembly, the first rocker pushing mechanism comprises rockers and bearings arranged above the rockers, the two rockers are connected through telescopic sleeves, the bearings are used for assisting the rockers to make unidirectional abdications on the pallet, the rockers are used for pushing the pallet to perform transposition, and two sides of the third motor are provided with rotating shafts for synchronously controlling the two rockers.

Preferably, the following bracket comprises a bottom frame, side plates and V-shaped clamping pieces, wherein the side plates are fixedly arranged on the side surfaces of the bottom frame, the V-shaped clamping pieces are fixedly arranged on one sides of the side plates, close to the bottom frame, of the side plates, the V-shaped clamping pieces are installed in a staggered mode with the bottom frame, and arc-shaped grooves corresponding to the bearings are formed in one sides, away from the V-shaped clamping pieces, of the side plates.

Preferably, the lateral clamping piece further comprises an inner ring positioning piece arranged on the fixing ring, and the inner ring positioning piece comprises three positioning blocks distributed in a Y shape and used for performing auxiliary positioning on the workpiece.

Preferably, the rack is symmetrically provided with guide mechanisms, each guide mechanism comprises a guide frame, and a fixed guide plate and a movable guide plate which are arranged on one side of the guide frame, the fixed guide plate and the movable guide plate are connected through a shaft rod, the shaft rod is controlled to rotate by a micro motor, and the micro motor is arranged in the fixed guide plate.

Preferably, a controller is arranged on the frame and is electrically connected with the first motor, the second motor, the third motor and the hydraulic telescopic assembly, and the controller is used for controlling clamping and positioning of the workpiece.

Compared with the prior art, the invention has the following beneficial effects:

the invention is provided with the lateral clamping piece and the longitudinal clamping piece which can be controlled by the Archimedean spiral groove, a plurality of clamping pieces in the lateral clamping piece can be used for laterally and accurately centering and laterally clamping a laterally moving workpiece, a clamping plate in the longitudinal clamping piece can be used for obliquely lifting and longitudinally pressurizing the workpiece, the workpiece is limited in full freedom degree by the position positioning of the two clamping pieces and the clamping pressure thereof, and the positioning precision is high and the positioning is stable by combining an automatic positioning and aligning mode, so that the machining efficiency can be effectively improved.

Drawings

Fig. 1 is a schematic top view of an automatic clamping mechanism for heavy cylindrical workpieces.

Fig. 2 is a schematic diagram of a detailed structure of the lateral clamping member.

Fig. 3 is a schematic diagram of the back structure of the turntable.

Fig. 4 is a schematic diagram of the front structure of the turntable.

Fig. 5 is a schematic view of a partial sectional structure of a connection position of a turntable and a bevel gear.

Fig. 6 is a schematic top view of the retaining ring.

Fig. 7 is a schematic side view of a longitudinal clamp.

Fig. 8 is a schematic view of a pallet configuration.

Fig. 9 is a side view schematic of a first rocker push-out mechanism.

Fig. 10 is a schematic side view of a second rocker ejecting mechanism.

Fig. 11 is a side view of the temporary storage rack.

Fig. 12 is a schematic side view of a first hydraulic telescoping assembly.

Fig. 13 is a schematic side sectional structure of the guide mechanism.

Fig. 14 is a schematic cross-sectional view of a part of the connection between the clamping rod and the circular table roller.

In the figure: a frame-1;

the device comprises a lateral clamping piece-2, a clamping piece-21, a fixed ring-22, a turntable-23, a first motor-24, a bevel gear-25 and a first pressure sensor-26;

a positioning block-221;

spring plate-231;

the device comprises a longitudinal clamping piece-3, a clamping plate-31, a clamping rod-32, a round table roller-33, a second motor-34 and a second pressure sensor-35;

the following bracket-4, the underframe-41, the V-shaped clamping piece-42 and the side plate-43;

a workpiece-5;

the device comprises a guide frame-6, a fixed guide plate-61, a movable guide plate-62, a shaft lever-63, a miniature motor-64, a spring-65, a guide sleeve-66, a guide post-67 and an anti-rotation key-68;

the hydraulic machine comprises a first hydraulic telescopic component-7, a supporting disc-71, a telescopic rod-72 and a hydraulic machine-73;

the first rocker pushing mechanism-8, the rocker-81, the bearing-82 and the third motor-83;

a second hydraulic telescopic assembly-9;

the second rocker pushing mechanism-10, the push rod-101 and the fourth motor-102;

temporary storage rack-11.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.

In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Examples

As shown in fig. 1 to 13:

the invention provides an automatic clamping mechanism for a heavy cylindrical workpiece, which comprises a frame 1, wherein a clamping assembly is arranged in the middle of the frame 1; a workpiece 5; the clamping assembly comprises a lateral clamping member 2 and a longitudinal clamping member 3; the lateral clamping piece 2 comprises a turntable 23 with a spiral groove on the upper surface, a plurality of clamping pieces 21 embedded in the spiral groove, a fixed ring 22 with a plurality of guide grooves and a first motor 24 with a bevel gear 25, wherein the fixed ring 22 is arranged above the turntable 23, the first motor 24 drives the turntable 23 to rotate, the bevel gear 25 is meshed with an annular bevel tooth surface protruding from the lower surface of the turntable 23, the clamping pieces 21 penetrate through the fixed ring 22 and are embedded in the turntable 23, the turntable 23 is driven to rotate, and the clamping pieces 21 can transversely move in the spiral groove along the guide grooves of the fixed ring 22 to laterally position and clamp the workpiece 5;

the longitudinal clamping piece 3 comprises a clamping rod 32 with a clamping plate 31 and a second motor 34 with a round table roller 33 for driving the clamping rod 32, a spiral groove is formed in the round table roller 33, a transverse guide groove is formed at the joint of the frame 1 and the clamping rod 32, and the round table roller 33 is driven to enable the clamping rod 32 inserted into the spiral groove to move left and right obliquely along the transverse guide groove so as to longitudinally position and clamp the workpiece 5;

and the controller (not shown in the figure) is electrically connected with the lateral clamping piece 2 and the longitudinal clamping piece 3, and controls the lateral clamping piece 2 to clamp the workpiece 5 and controls the longitudinal clamping piece 3 to clamp the workpiece 5.

As a further improvement, the frame 1 is provided with a to-be-processed area, a processing area and a processing completion area from right to left, and the clamping assembly is arranged in the processing area.

The existing needle cylinder in the circular knitting machine is usually calibrated and clamped by adopting a manual positioning mode, if the clamping mode is adopted, positioning and alignment are time-consuming and labor-consuming, positioning accuracy consistency is poor, positioning accuracy depends on the technical level of an operator, and machining efficiency is limited, so that the lateral clamping piece 2 and the longitudinal clamping piece 3 are arranged to simultaneously position and clamp the workpiece 5;

specifically, the first motor 24 is activated by the controller to drive the turntable 23 to rotate, the archimedes spiral groove above the turntable 23 can enable the clamp 21 to move towards the workpiece 5 through the change of the size of the contact groove ring of the clamp 21 during rotation, the first pressure sensors 26 on the inner sides of the clamp 21 are triggered when the clamp 21 contacts the workpiece 5, and when all the first pressure sensors 26 in the sinking grooves on the inner sides of all the clamp 21 are triggered simultaneously, the pressure value difference value ranges from 0.1 Pa to 0.2Pa, the controller controls the first motor 24 with the bevel gear 25 to stop rotating, so that all the clamp 21 stops moving, the side clamping state of the workpiece 5 is kept, and simultaneously the controller drives the second motor 34 with the round table roller 33.

Specifically, when the second motor 34 is started, the clamping rod 32 is movably inserted above the round table with the archimedes spiral groove, and the clamping rod 32 moves towards the workpiece 5 through the change of the groove ring of the clamping rod 32 on the round table; the clamping plate 31 moves obliquely along with the clamping rod 32, and gradually presses the workpiece 5 longitudinally, and when the second pressure sensor 35 in the sinking groove below the clamping plate 31 is triggered and the pressure value reaches a preset value, the controller controls the second motor 34 to stop rotating, so that all the clamping plates 31 stop pressing down, and the state of longitudinally pressing the workpiece 5 is maintained. In this embodiment, the preset value is 100Pa, and in other embodiments, the preset value can be adjusted according to different materials and thicknesses.

It should be emphasized that the elastic piece 231 is disposed in the thread groove of the turntable 23, and the elastic piece 231 in the contact area of the turntable 23 and the clamping piece 21 abuts against the clamping piece 21, so that the elastic piece 231 can eliminate the gap between the clamping piece 21 and the thread groove of the turntable 23 during the movement of the clamping piece 21, and the alignment of the clamping piece 21 to the workpiece 5 is in a low error state.

When the workpiece 5 is processed, the controller drives the first motor 24 and the second motor 34 to rotate reversely, and simultaneously enables the lateral clamping piece 2 and the longitudinal clamping piece 3 to release the clamping state of the workpiece 5 and enables the lateral clamping piece 2 and the longitudinal clamping piece 3 to reset.

In addition, after the lateral clamping member 2 is triggered and the positioning and clamping are completed, the longitudinal clamping member 3 is clamped, wherein when all the clamping members 21 in the lateral clamping member 2 are not in contact with the workpiece 5, the clamping members 21 in contact with the workpiece 5 can push the workpiece 5 to move towards a preset positioning point, the direction of the clamping members 21 not in contact with the workpiece 5 is prescribed, and when all the clamping members 21 are in contact with the workpiece 5 and the pressure on the workpiece 5 reaches a basically isobaric state, the workpiece 5 is positioned by default and the lateral clamping is completed.

Meanwhile, in order to improve efficiency, a temporary storage frame 11, a guiding mechanism and a second hydraulic telescopic assembly 9 are further arranged on the frame 1, the frame 1 is provided with the temporary storage frame 11 in a to-be-processed area, a plurality of follower brackets 4 with workpieces 5 can be stacked, a second rocker pushing mechanism 10 with a push rod 101 is arranged on the frame 1 on the right side of the temporary storage frame 11, the second rocker pushing mechanism 10 is driven by a fourth motor 102 arranged below the to-be-processed area, and two sides of the fourth motor 102 are provided with rotating shafts for synchronously controlling two rockers 81; the machine frame 1 is characterized in that a to-be-machined area and a machining area are symmetrically provided with a guide mechanism, the guide mechanism comprises a guide frame 6, a fixed guide plate 61 and a movable guide plate 62 which are arranged on one side of the guide frame 6, the fixed guide plate 61 and the movable guide plate 62 are connected through a shaft rod 63, the shaft rod 63 is controlled to rotate by a micro motor 64, the micro motor 64 is arranged in the fixed guide plate 61, the fixed guide plate 61 and a guide sleeve 66 arranged on the side face of the fixed guide plate 61 are of an integrated structure, a guide pillar 67 is sleeved inside the guide sleeve 66, an anti-rotation key 68 is arranged between the guide sleeve 66 and the guide pillar 67, the telescopic guide pillar 67 is fixed on the machine frame 1, a second hydraulic telescopic assembly 9 for lifting the following bracket 4 is arranged in the machine frame 1 in the to-be-machined area, the following bracket 4 with a workpiece 5 can be ejected out of the temporary storage frame 11, and the following bracket 4 with the workpiece 5 can be pushed out from the to-be-machined area under the guide of the fixed guide plate 61 of the guide mechanism through the second rocker pushing mechanism 10.

The end of the push rod 101 of the second rocker pushing mechanism 10 is provided with a second bearing 82, the height of the push rod 101 is kept at the height of an arc groove of a follower bracket 4 above the temporary storage frame 11, and a spring 65 can be arranged between the side surface of the movable guide plate 62 and the guide frame 6 for assisting the reset of the movable guide plate 62 and strengthening the pressure of the movable guide plate 62 during fastening. The movable guide plate 62 is used for being opened when the pallet 4 is placed or taken out, and can be opened and closed through the micro motor 64, and the micro motor 64 is electrically connected with the controller and can be controlled through the controller.

Meanwhile, in order to match the follower bracket 4 with the workpiece 5 to enter the processing area from the area to be processed, a first hydraulic telescopic assembly 7 is further arranged in the processing area of the frame 1, a supporting disc 71 is arranged above the first hydraulic telescopic assembly 7, and the supporting disc 71 can be embedded into the fixed ring 22; the support disc 71 in the lifted state is in contact with the bottom of the pallet 4, the pallet 4 with the workpiece 5 is brought into a processing area by descending at a constant speed of the first hydraulic telescopic assembly 7, wherein the hydraulic telescopic assembly comprises a hydraulic press 73 and a telescopic rod 72, and the support disc 71 is fixed above the telescopic rod 72.

It should be emphasized that the pallet 4 is completely offset from the lateral clamps 2 and the course of action in the processing zone, and that the fixed ring 22 is provided with grooves corresponding to the pallet 4, and that the support plate 71 controlled by the first hydraulic telescopic assembly 7 is embedded in the fixed ring 22, and that the upper surface of the chassis 41 of the pallet 4 is at the same level as the upper surface of the fixed ring 22, and that the grooves are used to assist the pallet 4 in yielding, so that the contact surface between the workpiece 5 and the clamp 21 is maximized.

Meanwhile, after the machining of the machining area is completed for matching with the workpiece 5, the workpiece is moved to the machining completion area, a first rocker pushing mechanism 8 and a third motor 83 for driving the rocker pushing mechanism are arranged on two sides of the machining area of the frame 1, the first rocker pushing mechanism 8 comprises a rocker 81 and a bearing 82 arranged above the rocker 81, the two sections of the rocker 81 are connected through a telescopic sleeve, the bearing 82 is used for assisting the rocker 81 to perform unidirectional abdication on the pallet 4, and the rocker 81 is used for pushing the pallet 4 to perform transposition.

It should be emphasized that the first rocker pushing mechanism 8 differs from the second rocker pushing mechanism 10 in that the first rocker pushing mechanism 8 is not provided with a push rod 101, when the first hydraulic telescopic assembly 7 controls the support disc 71 to lift the pallet 4 with the workpiece 5 onto the guiding mechanism, the bearing 82 above the rocker 81 is inserted into the arc groove on the side of the pallet 4, and two sides of the third motor 83 are provided with rotating shafts for synchronously controlling the two rockers 81 in the first rocker pushing mechanism 8 to push the workpiece 5 from the processing area to the processing completion area.

As a further improvement, the follower bracket 4 comprises a bottom frame 41, side plates 43 and V-shaped clamping pieces 42, wherein the side plates 43 are fixedly arranged on the side surfaces of the bottom frame 41, the V-shaped clamping pieces 42 are fixedly arranged on one side, close to the bottom frame 41, of the side plates 43, the V-shaped clamping pieces 42 are installed in a staggered manner with the bottom frame 41, and arc-shaped grooves corresponding to the bearings 82 are formed in one side, far away from the V-shaped clamping pieces 42, of the side plates 43. The V-shaped clamping piece 42 can constrain the center line of the workpiece 5, so that the center line of the workpiece 5 and the center line of the pallet 4 can be easily overlapped.

As a further development, the lateral clamping element 2 further comprises an inner ring positioning element arranged on the fixing ring 22, wherein the inner ring positioning element comprises three positioning blocks 221 distributed in a Y shape for assisting in positioning the workpiece 5. Wherein, the setting direction of the inner ring locating piece and the clamping piece 21 in the lateral clamping piece 2 is consistent, and the inner ring locating piece and the clamping piece are completely staggered with the following bracket 4.

As a further development, the securing ring 22 is a positioning element:

(a) Selecting and designing: spheroidal graphite cast iron or 40Cr+IT5 grade mirror polishing; flatness of 0.1 μm

(b) And (3) processing and installing: polishing a workpiece on a high-precision plane grinding machine to position a large plane, so as to realize dimension precision IT5 and surface roughness of 2 mu m to 0.05 mu m;

(c) Ultra-precise machining of the matching part of the positioning working surface, namely, installing a polishing head on a machine tool for actually machining the needle cylinder, and carrying out secondary polishing on a positioning large plane, wherein the flatness error is further close to zero;

(d) Cleaning and clamping a workpiece positioning surface: cleaning the workpiece positioning surface and the positioning element working surface by using high-pressure cold sensing air before each installation;

(e) Sensing on-line detection and grinding finishing: and detecting and polishing the working surface of the positioning element on line by taking the self-reference principle.

The application method of the automatic clamping system for the heavy cylindrical workpieces comprises the following steps:

s1, the workpiece conveying module comprises a first workpiece conveying module and a second workpiece conveying module, wherein the first workpiece conveying module lifts a workpiece from a to-be-processed area and pushes the workpiece into the to-be-processed area, and the second workpiece conveying module descends the workpiece to a clamping plane to obtain the to-be-processed workpiece to be clamped;

s2, clamping a workpiece to be machined, which enters a clamping area, from the side face through a first clamping module by taking an Archimedes spiral plane wire slot as a guide, gradually limiting four degrees of freedom of the workpiece in the X, Y axis direction under the assistance of an induction module, and simultaneously positioning the circle center of the workpiece to obtain a workpiece to be machined with a reset circle center and a first-stage limit;

s3, the second clamping module is used for longitudinally clamping the workpiece by taking the Archimedes spiral inclined plane wire slot as a guide, and the freedom degree of the workpiece moving in the Z-axis direction is gradually limited under the assistance of the induction module, so that the completely clamped workpiece to be machined is obtained;

s4, machining the workpiece to be machined, and after machining, simultaneously releasing the first clamping module and the second clamping module, and sending out the machined workpiece through the second workpiece sending module.

In the step S1, the first feeding assembly includes:

the first lifter is used for lifting the workpiece, the first rocker pushing mechanism is used for pushing the workpiece into the processing area and pushing the workpiece into the push rod of the processing area, the second workpiece conveying assembly comprises a second lifter used for lifting the workpiece and a second rocker pushing mechanism used for pushing the workpiece to leave the processing area, the first lifter is used for lifting the workpiece to the guide height of the guide assembly, and the workpiece can be pushed to the position right above the second lifter under the guide of the guide assembly through the first pushing mechanism.

In the step S2, the first clamping module includes:

the disc is rotated, the clamping blocks are controlled to move at the same speed under the guidance of the Archimedean spiral groove, when the clamping blocks are gradually folded, the side faces of the workpieces are clamped, when the clamping blocks are gradually dispersed, the clamped workpieces are released, and meanwhile, the elastic sheets which are embedded into the inner side of the disc groove and are in contact with the clamping blocks are used for pressing the clamping blocks so as to fill the gaps of the clamping blocks in the groove, so that the clamping state is more stable.

In the step S3, the second clamping module includes:

and the round table is rotated, the clamping piece perpendicular to the axis of the round table is controlled, the Archimedean spiral bevel wire slot extending the outer ring surface of the round table moves, when the clamping piece moves inwards, the clamping piece gradually descends to clamp the upper surface of the workpiece, and when the clamping piece moves outwards, the clamping piece gradually ascends to release the clamped workpiece.

It should be emphasized that the circular truncated cone should be disposed laterally with the large diameter facing outward and the small diameter facing inward.

In the step S4, the second feeding assembly includes:

the second lifter is used for descending the workpiece entering the processing area to the clamping plane, and the second rocker pushing mechanism is used for pushing the workpiece, the second lifter is used for lifting the workpiece to the guide height of the guide assembly after the workpiece is processed, and the second rocker pushing mechanism is used for pushing the workpiece to the processing completion area from the processing area.

As a further supplement, the clamping system can be suitable for cylindrical workpieces with various sizes, and the automatic centering clamping fixture system is flexible: if the single-side claw can effectively adjust delta R in the radial direction, and the average processing needle cylinder diameter is delta, the diameter range of the clamp adapting to the needle cylinder is delta=da+/-2 delta R.

The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (3)

1. Automatic clamping mechanism of heavy cylinder work piece, characterized by, include:

the device comprises a frame (1), wherein a clamping assembly is arranged in the middle of the frame (1), a region to be processed, a processing region and a processing completion region are sequentially arranged on the frame (1) from right to left, and the clamping assembly is arranged in the processing region;

a workpiece (5);

the clamping assembly comprises a lateral clamping piece (2) and a longitudinal clamping piece (3);

the lateral clamping piece (2) comprises a rotary table (23) with a spiral groove on the upper surface, a plurality of clamping pieces (21) embedded in the spiral groove, a fixed ring (22) with a plurality of guide grooves and a first motor (24) with a bevel gear (25) are arranged above the rotary table (23), the bevel gear (25) is meshed with an annular bevel tooth surface protruding from the lower surface of the rotary table (23), the clamping pieces (21) penetrate through the fixed ring (22) and are embedded in the rotary table (23), the rotary table (23) is driven to rotate, the clamping pieces (21) can transversely move along the guide grooves of the fixed ring (22) in the spiral groove, and the workpiece (5) is laterally positioned and clamped;

the longitudinal clamping piece (3) comprises a clamping rod (32) with a clamping plate (31) and a second motor (34) with a round table roller (33) for driving the clamping rod (32), a spiral groove is formed in the round table roller (33), a transverse guide groove is formed in the joint of the frame (1) and the clamping rod (32), the round table roller (33) is driven, and the clamping rod (32) inserted into the spiral groove can move obliquely left and right along the transverse guide groove to longitudinally position and clamp the workpiece (5);

a follower bracket (4) is arranged below the workpiece (5), and a groove matched with the follower bracket (4) is arranged on the fixed ring (22);

the following bracket (4) comprises a bottom frame (41), side plates (43) and V-shaped clamping pieces (42), wherein the side plates (43) are fixedly arranged on the side surfaces of the bottom frame (41), the V-shaped clamping pieces (42) are fixedly arranged on one side, close to the bottom frame (41), of the side plates (43), the V-shaped clamping pieces (42) are installed in a dislocation mode with the bottom frame (41), and arc-shaped grooves corresponding to bearings are formed in one side, far away from the V-shaped clamping pieces (42), of the side plates (43); the controller is electrically connected with the lateral clamping piece (2) and the longitudinal clamping piece (3), and controls the lateral clamping piece (2) to clamp the workpiece (5) and controls the longitudinal clamping piece (3) to clamp the workpiece (5);

a second pressure sensor (35) is arranged in the sinking groove below the clamping plate (31), and when the pressure value of the second pressure sensor (35) reaches a preset value, the controller controls the second motor (34) to stop rotating;

the machining area both sides of frame (1) are equipped with first rocker ejecting mechanism (8) to and drive third motor (83) of first rocker ejecting mechanism (8), first rocker ejecting mechanism (8) include rocker (81) and set up bearing (82) in rocker (81) top, two sections connect through the telescopic sleeve between rocker (81), bearing (82) are used for assisting rocker (81) to carry out unilateral abdication to pallet (4), rocker (81) are used for promoting pallet (4) to replace, third motor (83) both sides are equipped with the pivot for two rockers of synchronous control (81).

2. The automatic clamping mechanism for heavy cylindrical workpieces according to claim 1, wherein: elastic pieces (231) are arranged in the thread grooves in the rotary table (23), and the elastic pieces (231) in the contact area of the rotary table (23) and the clamping pieces (21) are propped against the clamping pieces (21).

3. The automatic clamping mechanism for heavy cylindrical workpieces according to claim 1, wherein: a supporting disc is arranged in the middle of the fixed ring (22), and a hydraulic telescopic component is arranged below the supporting disc (71) and used for lifting the following bracket (4).

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