CN110524068B

CN110524068B - Bar feeding device

Info

Publication number: CN110524068B
Application number: CN201910877144.8A
Authority: CN
Inventors: 郑金良
Original assignee: HANGZHOU ZHENGCHIDA PRECISION MACHINERY CO Ltd
Current assignee: HANGZHOU ZHENGCHIDA PRECISION MACHINERY CO Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2024-02-09
Anticipated expiration: 2039-09-17
Also published as: CN110524068A

Abstract

The invention relates to a production device of watch parts. The bar feeding device has the characteristics of high automation degree, reliable operation and high production efficiency. The technical proposal is as follows: bar loading attachment, its characterized in that: the device comprises a bar pushing mechanism and a bar adding mechanism; the bar pushing mechanism comprises a frame, a guide mechanism, a pushing frame, a advancing mechanism, a retreating mechanism and a docking mechanism, wherein the guide mechanism is arranged on the frame and used for guiding bars and the pushing frame to move; the guide mechanism comprises a first chute, a second chute, a fixed baffle, a movable baffle and an opening and closing cylinder, wherein the first chute and the second chute are horizontally fixed on the frame, the fixed baffle and the movable baffle are arranged on the notch of the second chute, and the opening and closing cylinder is used for driving the movable baffle to horizontally move.

Description

Bar feeding device

Technical Field

The invention relates to production equipment of watch parts, in particular to a bar stock feeding device.

Background

The parts inside the mechanical watch are all fastened together through small screws, and the screws are mainly processed by bar materials (such as SK 4F), and the specific processing steps are as follows: firstly, pushing the bar 50 horizontally into a machine tool 70, and processing the end of the bar into a screw by a machine tool cutting blade; every time after the machine tool finishes machining one screw (the machined screw falls into the material box after being cut off from the bar stock), the rest bar stock is required to be continuously horizontally pushed into the machine tool chuck for a certain distance to machine the next screw, the process is repeated until the whole bar stock is shortened to a certain length, the old bar stock is required to be pulled out, and a new bar stock is required to be replaced for continuous production. The process is currently mainly dependent on the cooperation of a semi-automatic machine and manual operation, and a full-automatic device capable of continuously realizing bar installation, pushing, backing and replacement is not yet available, so that further research and development are required.

Disclosure of Invention

The invention aims to overcome the defects in the background technology and provide a bar stock feeding device which has the characteristics of high automation degree, reliable operation and high production efficiency.

The technical scheme of the invention is as follows:

bar loading attachment, its characterized in that: the device comprises a bar pushing mechanism and a bar adding mechanism;

the bar pushing mechanism comprises a frame, a guide mechanism, a pushing frame, a advancing mechanism, a retreating mechanism and a docking mechanism, wherein the guide mechanism is arranged on the frame and used for guiding bars and the pushing frame to move;

the guide mechanism comprises a first chute, a second chute, a fixed baffle, a movable baffle and an opening and closing cylinder, wherein the first chute and the second chute are horizontally fixed on the frame, the fixed baffle and the movable baffle are arranged at the notch of the second chute, and the opening and closing cylinder is used for driving the movable baffle to horizontally move;

the backing mechanism comprises a backing motor, a driving wheel arranged on a rotating shaft of the backing motor, a pulley block arranged on the frame, a first connecting rope encircling the driving wheel and the pulley block, and a limiting block fixed with the first connecting rope;

the advancing mechanism comprises a reel rotatably positioned at the left end of the frame, a counterweight arranged below the frame, a second connecting rope wound on the reel rim and connected with the pushing frame, and a third connecting rope wound on the reel rim and connected with the counterweight;

the pushing frame comprises a pushing block which is slidably positioned on the first connecting rope and is fixed with the second connecting rope, a pushing plate vertically fixed at the bottom of the pushing block, and a sleeve which is fixed with the pushing plate through a pushing rod and can slide along the sliding chute; the front end of the sleeve is provided with a jack for inserting bar stock;

the butt joint mechanism comprises a pair of first air cylinders and a pair of second air cylinders which are sequentially arranged between the first sliding chute and the second sliding chute and are horizontally arranged, the first air cylinders are symmetrically fixed on two sides of the frame, the second air cylinders can be axially and slidably symmetrically positioned on two sides of the frame through the connecting frame, the third air cylinders are fixed at the bottom of the frame, piston rods of the third air cylinders are fixed with the connecting frame, and clamping blocks for clamping bars or sleeves are arranged on the first air cylinders and the second air cylinders;

the bar adding mechanism is arranged on the side surface of the frame and comprises a ratchet mechanism, a plurality of belt wheel mechanisms which are arranged in parallel with the length direction of the frame, a transmission shaft which is rotatably positioned on the first mounting plate and transmits power between the belt wheel mechanisms and the ratchet mechanism, and a release cylinder which drives the belt wheel mechanisms to move through the ratchet mechanism and the transmission shaft;

the belt wheel mechanism comprises a first mounting plate fixed with the side surface of the frame, a driving gear fixed on the transmission shaft, two belt wheels rotatably positioned on the first mounting plate, and a transmission belt sleeved on the two belt wheels; the conveyor belt is provided with single-sided teeth, and the driving gear is arranged below the conveyor belt and meshed with the single-sided teeth;

the release cylinder is fixed with the frame through a second mounting plate; the ratchet mechanism comprises a ratchet fixed on the transmission shaft, a cylinder push plate with one end rotatably positioned on the transmission shaft and the other end pushed by the release cylinder, a pawl rotatably positioned on the cylinder push plate and matched with the ratchet, and a tension spring with two ends respectively applying tension to the second mounting plate and the pawl.

The clamping blocks are provided with a plurality of clamping jaws which are arranged in a staggered mode up and down, and the clamping jaws of the two clamping blocks which are symmetrically arranged are also arranged in a staggered mode.

A material box for placing the residual stub bar is arranged below the frame and the butt joint mechanism; the right end of the first chute is provided with a first sensor, the left end of the second chute is provided with a second sensor, the material box is provided with a third sensor, and the fixed baffle is provided with a fourth sensor.

The docking mechanism further comprises a fourth cylinder which is positioned between the second cylinder and the second sliding groove and is horizontally arranged.

The pulley block comprises two first guide wheels and two second guide wheels, the first guide wheels can be rotatably positioned at two ends of the frame around a vertical axis, and the second guide wheels are arranged above the driving wheels and can be rotatably positioned at the side surface of the frame around a horizontal axis; the first connecting rope surrounds the first guide wheel, the second guide wheel and the driving wheel.

The advancing mechanism further comprises two third guide wheels which can be positioned on the side face of the frame in a rotating mode around the horizontal axis, one end of each third connecting rope is wound on the corresponding winding wheel rim, the other end of each third connecting rope is connected with the corresponding counterweight after bypassing the corresponding third guide wheel, and accordingly thrust is provided for the pushing frame for pushing the bar through the second connecting rope wound on the corresponding winding wheel rim.

A positioning plate for keeping the bar position is arranged above the right belt wheel of the belt wheel mechanism, and a guide plate for guiding the bar rolling position is arranged below the right belt wheel of the belt wheel mechanism; the positioning plate is in a circular arc shape which is matched with the shape of the belt wheel; the guide plates are arranged obliquely.

The axis of the belt wheel is parallel to the length direction of the frame.

The cylinder push plate is provided with a sliding groove, a cylinder push rod penetrating through the sliding groove is fixed on a piston rod of the release cylinder, and a pair of clamping blocks for pushing and pulling the push plate are arranged on the push rod.

A baffle plate is arranged between the belt wheel mechanism and the ratchet mechanism; the baffle is fixed with the frame through a third mounting plate.

The beneficial effects of the invention are as follows:

according to the invention, actions such as feeding the bar into the machine tool, pulling out the machine tool and the like can be sequentially realized through the bar pushing mechanism, and then automatic loading of the bar is realized through the bar releasing structure, so that continuous production of bar processing is realized, the automation degree of the device is improved, the running reliability is ensured, the production efficiency is improved, and the production cost is reduced.

Drawings

Fig. 1 is a schematic diagram of a front view of a bar stock pushing mechanism.

Fig. 2 is a schematic rear view of the bar pushing mechanism.

Fig. 3 is one of schematic top plan views of the bar stock pushing mechanism (also schematic top plan views of the present invention).

FIG. 4 is a second schematic top view of the bar pushing mechanism.

Fig. 5 is a schematic view of the working states of the advancing mechanism and the retracting mechanism in the bar pushing mechanism (top view structure).

Fig. 6 is a second schematic view of the working states of the advancing mechanism and the retracting mechanism in the bar pushing mechanism (top view structure).

Fig. 7 is a third schematic view of the working states of the advancing mechanism and the retracting mechanism in the bar pushing mechanism (top view structure).

Fig. 8 is a schematic diagram of a front view of a pushing frame in the bar pushing mechanism.

Fig. 9 is a schematic top view of a pushing ram in the bar pushing mechanism.

Fig. 10 is a right-side view of a pushing frame in the bar pushing mechanism.

Fig. 11 is one of the right-view structural schematic diagrams of the second guide rail in the bar pushing mechanism (the movable baffle is closed with the fixed baffle).

Fig. 12 is a second schematic right-view of the second rail of the bar pushing mechanism (the movable barrier is separated from the fixed barrier).

Fig. 13 is a schematic top view of the first cylinder in the bar pushing mechanism.

Fig. 14 is a right-hand structural schematic view of the first cylinder in the bar pushing mechanism.

Fig. 15 is a right-side view of a block-apart state of the bar pushing mechanism.

Fig. 16 is a right side view schematic of the clip closure in the bar pushing mechanism.

Fig. 17 is a schematic top view of the bar stock adding mechanism.

Fig. 18 is a schematic top view of the pulley mechanism in the bar adding mechanism.

Fig. 19 is a schematic right-view structural view of the pulley mechanism in the bar adding mechanism.

Fig. 20 is a schematic view of the front view of the shutter in the bar adding mechanism.

Fig. 21 is a schematic right-view of the ratchet mechanism in the bar stock adding mechanism.

Fig. 22 is a schematic right-view structure of the ratchet mechanism in the bar stock adding mechanism (the ratchet is omitted).

Fig. 23 is a schematic top view of the ratchet mechanism in the bar adding mechanism.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.

The bar feeding device comprises a bar pushing mechanism and a bar adding mechanism, and the working principle is as follows: the bar adding mechanism 80 loads the bar 50 (about 200 cm to 250 cm) into the bar pushing mechanism 60, the bar pushing mechanism sends the end of the bar into the machine tool 70 for processing, and the bar pushing mechanism continuously pushes the bar horizontally into the chuck of the machine tool for a distance (a distance of one screw length) after one screw is processed by the machine tool; when the bar stock is shortened to a certain length (about 20 cm to 30 cm), the bar stock pushing mechanism pulls out the waste material, and the bar stock adding mechanism loads new bar stock into the bar stock pushing machine, so that continuous production is realized.

1. Bar pushing mechanism

As shown in fig. 1, the bar pushing mechanism comprises a frame 40 (the length of the frame is 6-8 m; the length direction is the left-right direction in fig. 1), and a guide mechanism, a pushing frame, a forward mechanism, a backward mechanism and a butt joint mechanism which are respectively arranged on the frame.

The guide mechanism is arranged at the top of the frame and used for guiding the bar to move. The guiding mechanism comprises a first chute 1, a second chute 2, a fixed baffle 3, a movable baffle 4 and an opening and closing cylinder 5. The first sliding rail and the second sliding rail are horizontally fixed on the frame, the top surfaces of the first sliding rail and the second sliding rail are provided with sliding grooves and the sliding grooves of the two sliding rails are coaxially arranged, the first sliding groove and the second sliding groove are horizontally fixed on the frame, and the first sliding groove and the second sliding groove are coaxially arranged and keep a certain distance between the two sliding grooves. As shown in fig. 1, the first chute is fixed on the right side of the frame, the second chute is fixed on the left side of the frame, and the left side of the second chute is also provided with a positioning tube 31 (the tube hole of the positioning tube is aligned with the chute). The opening and closing cylinder is fixed with the frame through an opening and closing cylinder bracket (omitted in the figure), the fixed baffle and the movable baffle are arranged above the notch of the second chute, the fixed baffle is fixed on the right side (the right side of fig. 11) of the notch of the second chute, and the movable baffle is arranged on the left side (the left side of fig. 11) of the notch of the second chute and is fixed with a piston rod of the opening and closing cylinder. The telescopic direction (vertical direction in fig. 3) of the piston rod of the opening and closing cylinder is perpendicular to the length direction (horizontal direction in fig. 3) of the frame. The opening and closing cylinder is used for driving the movable baffle to horizontally move, when the movable baffle and the fixed baffle are closed (a certain gap is still kept between the two baffles and the movable baffle is used as a slide way for pushing the plate to move), the notch of the second chute is closed (the bar falls into the second chute), and when the movable baffle and the fixed baffle are separated, the notch of the second chute is opened. Because the bar is softer, the pushing frame pushes the bar to be easy to deform and bend when the bar moves in the axial direction in the second chute, and the bar can be effectively limited to deform when the movable baffle and the fixed baffle are closed.

The pushing frame can move along the guiding mechanism. As shown in fig. 8, the push frame includes a push block 14, a push plate 15 vertically fixed to the bottom of the push block, a push rod 16 horizontally arranged and having a right end (right end of fig. 8) fixed to the push plate, and a sleeve 17 fixed to the left end (left end of fig. 8) of the push rod. The push plate is parallel to the length direction axis of the frame with the push rod, the external diameter of the sleeve is smaller than the internal diameter of the chute, the left end of the sleeve is provided with a jack for inserting bar stock, the internal diameter of the jack is slightly smaller than the external diameter of the bar stock, and a plurality of expansion joints (omitted in the figure) are arranged outside the sleeve so that the sleeve can clamp the bar stock. The sleeve is fixed with the push rod through a thread structure, so that the sleeves with different sizes can be replaced to be matched with bars of various types. As shown in fig. 12, when the pushing frame moves in the guiding mechanism, the sleeve and the pushing rod move horizontally along the sliding groove of the sliding rail, the pushing block moves horizontally above the first sliding groove and the second sliding groove (including above the fixed baffle and the movable baffle), and the pushing plate slides along the sliding rail (formed by the gap between the movable baffle and the fixed baffle).

The backward mechanism is used for driving the pushing frame to move backward (the pushing frame moves horizontally to the right in fig. 1). The backing mechanism comprises a backing motor 6, a driving wheel 7, a pulley block, a first connecting rope 8 and a limiting block 9. The driving wheel is arranged on the rotating shaft of the retreating motor, the first connecting rope surrounds the driving wheel and the pulley block, and the limiting block is fixed with the first connecting rope. The pulley block comprises two first guide wheels 28 and two second guide wheels 29 which are rotatably positioned on the frame, the two first guide wheels are respectively arranged at two ends of the length direction of the frame and the rotation axes of the two first guide wheels are vertically arranged, the two second guide wheels are arranged on the side face of the frame and are positioned above the driving wheels, the rotation axes of the two second guide wheels are horizontally arranged, the first guide wheels and the second guide wheels are all arranged on the same horizontal plane, and the first connecting rope surrounds the first guide wheels, the second guide wheels and the driving wheels. The limiting block can be driven to horizontally move between the two first guide wheels when the backward motor is started. The pushing block of the pushing frame is slidably positioned on the first connecting rope and positioned on the right side (right side of fig. 1) of the limiting block, and the pushing frame can horizontally move rightward under the driving of the limiting block.

The advancing mechanism is used for driving the pushing frame to move forwards (the pushing frame moves horizontally leftwards in fig. 1). The advancing mechanism comprises a reel 10, a counterweight 11, a second connecting rope 12, a third connecting rope 13 and two third guide wheels 30. The reel includes coaxial fixed rim (the position that the external diameter is great) and arbor collar (the position that the external diameter is less), and the reel passes through reel support 10.1 and can be located in the frame left end around the horizontal axis, and the counter weight setting is in the frame below, and the third leading wheel can be located in the frame side around the horizontal axis rotationally, and the one end of second connecting rope twines on the reel rim and the other end is connected and is pushed away the frame, and the one end of third connecting rope twines on the reel rim and the other end is connected the counter weight after bypassing the third leading wheel. The second connecting rope and the third connecting rope are wound on the winding wheel in opposite directions. The balance weights can apply horizontal left (left side of fig. 1) pulling force to the pushing frame through the two connecting ropes and the winding wheel, so that the bar stock is ensured to have a trend of moving horizontally left, and the balance weights with different weights can be configured according to the size and the model of the bar stock.

The butt joint mechanism can be used for mounting the bar stock on the pushing frame and also can be used for pulling out the bar stock from the pushing frame. The docking mechanism comprises a pair of first cylinders 18, a pair of second cylinders 19, a third cylinder 21, a fourth cylinder 27 and clamping blocks 22 arranged on piston rods of the first cylinders and the second cylinders.

The first air cylinder, the second air cylinder and the fourth air cylinder are sequentially and horizontally arranged between the first sliding groove and the second sliding groove, the expansion and contraction directions of piston rods of the air cylinders are perpendicular to the length direction of the frame (namely the length direction of the first sliding groove), and each pair of first air cylinders and each pair of second air cylinders are symmetrically arranged on two sides of the width direction of the frame. The first cylinders are symmetrically fixed on two sides of the frame, the second cylinders are arranged on two sides of the frame in the width direction through connecting frames 20, the connecting frames can slide along the length direction of the frame (corresponding sliding rails and sliding blocks are arranged between the connecting frames and the frame and omitted in the figure), and the third cylinders are fixed on the bottom of the frame and used for driving the connecting frames. The clamping blocks are provided with a plurality of clamping jaws 22.1 which are arranged in a staggered manner up and down, the clamping jaws of the two clamping blocks of each pair of first air cylinders are respectively arranged in a staggered manner, and the clamping jaws of the two clamping blocks of each pair of second air cylinders are also respectively arranged in a staggered manner. The clamping blocks of the first air cylinder are used for clamping the sleeve of the pushing frame, the clamping blocks of the second air cylinder are used for clamping the bar stock, the third air cylinder is used for driving the second air cylinder to move horizontally so that the bar stock can be inserted into the sleeve or pulled out of the sleeve, the piston rod of the third air cylinder can play a role in supporting the bar stock when extending out (the bar stock is softer and easy to deform and sag, and the right end of the bar stock just can be aligned with the axis of the sleeve when the piston rod of the third air cylinder supports the bar stock) so as to assist the clamping blocks of the second air cylinder to clamp the bar stock.

A material box 23 for placing the residual stub bar is arranged below the frame and the docking mechanism. The right end of the first chute is provided with a first sensor 24, the left end of the second chute is provided with a second sensor 25, the upper part of the material box is provided with a third sensor 26, and the left end of the fixed baffle is provided with a fourth sensor 31.

2. Bar adding mechanism

As shown in fig. 17, the bar adding mechanism comprises a plurality of belt wheel mechanisms, a ratchet mechanism, a transmission shaft A1, a release cylinder A2 and a baffle a16.

The release cylinder, the ratchet mechanism, the baffle and the pulley mechanism are all fixed on the side surface of the frame of the bar pushing mechanism 60, the pulley mechanism is arranged parallel to the length direction L (horizontal direction in FIG. 17) of the frame, the transmission shaft is rotatably positioned on the first mounting plate and transmits power between the pulley mechanism and the ratchet mechanism, and the release cylinder drives the pulley mechanism through the ratchet mechanism and the transmission shaft.

The release cylinder is fixed with the frame through a second mounting plate A9, a cylinder push rod A14 is fixed on a piston rod of the release cylinder, two clamping blocks A15 are fixed on the cylinder push rod, and the telescopic direction of the piston rod of the release cylinder is perpendicular to the length direction of the frame.

The ratchet mechanism comprises a ratchet A10, a cylinder push plate A11, a pawl A12 and a tension spring A13. The ratchet wheel is fixed on the transmission shaft, the bottom end of the cylinder push plate is rotatably positioned (empty sleeve is arranged) on the transmission shaft, the cylinder push plate is provided with an axially extending sliding groove A11.1, the pawl A12 is rotatably hinged on the cylinder push plate, two ends of the tension spring 13 are respectively fixed with the second mounting plate and the pawl, and the pawl tip of the pawl is pressed on the ratchet wheel and meshed with the ratchet teeth of the ratchet wheel under the action of the tension spring. The cylinder push rod passes through the sliding groove of the push plate, two clamping blocks A15 on the cylinder push rod are respectively arranged on two sides of the cylinder push plate, and the cylinder push plate can be driven to swing when the cylinder is released to stretch out and draw back.

The belt wheel mechanism comprises a first mounting plate A3, a driving gear A4, two belt wheels A5, a conveying belt A6, a positioning plate A7 and a guide plate A8. The first mounting plate is fixed with the frame, two belt pulleys are rotatably positioned on the first mounting plate, and the two belt pulleys are arranged at the same horizontal position (one belt pulley is fixed on the transmission shaft, the other belt pulley is rotatably positioned on the fixed shaft through a bearing, and the fixed shaft and the transmission shaft are mutually parallel and arranged on the first mounting plate). The conveyor belt is sleeved on the belt wheels, single-sided teeth are arranged on the conveyor belt, the tooth pitch of the single-sided teeth is larger than the outer diameter of the bar stock, the driving gear is arranged below the central positions of the two belt wheels and meshed with the single-sided teeth of the conveyor belt, meanwhile, the driving gear is also fixed with the transmission shaft, a positioning plate A7 is arranged above the right belt wheel, a guide plate A8 is arranged below the right belt wheel, the positioning plate is in a circular arc shape which is suitable for the shape of the belt wheels, the guide plates are obliquely arranged, and the positioning plate and the guide plates are fixed with the first mounting plate through a connecting frame A18; therefore, the bar stock can not slide out at will when being conveyed to the end of the conveyor belt, and can only slide along the route determined by the guide plate.

The axis of the belt wheel is parallel to the length direction of the frame. The number of the belt wheel mechanisms is determined according to the requirement (the bar is softer, a plurality of belt wheel mechanisms are required to be arranged and simultaneously support all parts of the bar in a segmented mode), and 2-5 belt wheel mechanisms are generally arranged (three belt wheel mechanisms are arranged in fig. 17).

The baffle is arranged between the belt wheel mechanism and the ratchet mechanism, the baffle is fixed with the frame through a third mounting plate, and the cross section of the baffle is L-shaped (shown in figure 20).

The working steps of the bar pushing mechanism in the invention are as follows:

1. in the initial state, as shown in fig. 4 and 5, the limiting block and the pushing frame are positioned at the right end of the frame, and the right side of the pushing frame is positioned in the first chute;

2. the movable baffle is opened (shown in fig. 3), the piston rod of the fourth cylinder extends out, the bar adding mechanism emits a bar, the bar falls into the second chute (one end of the bar shown in fig. 1 extends outside the right side of the second chute and is supported by the piston rod of the fourth cylinder), and the movable baffle is closed;

3. the piston rods of the two first cylinders and the two second cylinders extend to clamp the sleeve and the bar respectively (as shown in figure 16), the third cylinder is started to drive the second cylinders to approach the first cylinders so as to insert the bar into the sleeve, and the piston rods of the first cylinders, the second cylinders and the fourth cylinders are retracted;

4. the backward motor is started to drive the limiting block to horizontally move leftwards, the balance weight drives the bar to horizontally move leftwards through the pushing frame (as shown in fig. 5), the left end of the bar passes through the positioning pipe and then stretches into the chuck of the machine tool and is blocked by the tool rest of the machine tool, so that the pushing frame stays between the two first guide wheels (as shown in fig. 6; the pushing frame in fig. 5-7 shows only the pushing block 14, and the rest is omitted), and the limiting block moves to the left side of the frame and touches the second sensor (as shown in fig. 7);

5. after receiving the signal of the second sensor, the machine tool starts to process: the clamping head clamps the bar firstly, the cutting knife processes a screw at the left end of the bar and cuts off the screw from the bar and drops, then the cutting knife returns to the original position and the clamping head loosens the bar;

6. after the clamping head loosens the bar, the counterweight can push the bar to horizontally move leftwards for a certain distance (a distance of one screw length) through the second connecting rope and the pushing frame until the left end of the bar stretches into the clamping head of the machine tool and then props against the tool rest of the machine tool, and the step 5 is returned to continue processing;

step 5, repeatedly cycling the steps 6, continuously cutting, forming and falling finished screws, and gradually closing the pushing frame to the position of the limiting block; when the fourth sensor detects the pushing frame, the machine tool stops processing, the backward motor is started to drive the limiting block to horizontally move to the right side of the frame, and the limiting block also drives the pushing frame to move to the right and simultaneously pulls out the rest bar from the chuck and the second chute of the machine tool;

7. the pushing frame is pulled to the right side of the frame by the limiting block, the pushing frame touches the first sensor to send a signal, the first cylinder and the second cylinder obtain instructions, respective piston rods extend to clamp the sleeve and the bar respectively, then the third cylinder is started to drive the second cylinder to approach the fourth cylinder to pull out the rest bar stub bars from the sleeve, the piston rods of the first cylinder and the second cylinder are retracted to loosen the bar stub bars (shown in figure 15), and the rest bar stub bars fall into the material box;

8. and (3) sending out a signal after the third sensor detects that the bar falls, and returning to the step (2) to continue production.

The working steps of the bar stock adding mechanism in the invention are as follows:

1. placing a plurality of bars 50 on the transmission belt in parallel with each other, wherein the bars are required to be placed in parallel with the length direction of the frame, and single-sided teeth of the transmission belt are arranged between every two bars at intervals, and the ends of the bars lean against the baffle plate to ensure alignment of all the bars;

2. the piston rod of the release cylinder is retracted, the cylinder push plate is driven to swing leftwards by the cylinder push rod (arrow F1 in FIG. 21), and the cylinder push plate drives the transmission shaft to rotate anticlockwise by a certain angle by the pawl and the ratchet wheel (arrow F2 in FIG. 21);

3. the transmission shaft drives all the driving gears to rotate clockwise by a certain angle (arrow F3 in fig. 19), the driving gears drive all the driving belts to rotate a certain distance (arrow F4 in fig. 19), the bar on the driving belts gradually moves towards the position of the positioning plate and passes below the positioning plate (the positioning plate can ensure that the bar positioned on the intrados of the positioning plate cannot slide outwards at will), when the bar rotates out of the positioning plate, the bar falls onto the guide plate below the positioning plate, and finally slides into the second chute of the bar pushing mechanism along the guide plate (the fixed baffle and the movable baffle are opened);

4. when the piston rod of the release cylinder stretches out, the cylinder push plate is driven to return, when the cylinder push plate swings, the pawl slides along the ratchet wheel, the transmission shaft is stationary, and the belt wheel mechanism does not work; each time the release cylinder stretches and contracts (the transmission shaft and the driving gear rotate once), one bar falls into the second chute of the bar pushing mechanism.

Claims

1. Bar loading attachment, its characterized in that: the device comprises a bar pushing mechanism and a bar adding mechanism;

the bar pushing mechanism comprises a frame (40), a guide mechanism arranged on the frame for guiding the bar and the pushing frame to move, a pushing frame horizontally movably positioned in the guide mechanism, a forward mechanism for driving the pushing frame to move forward, a backward mechanism for driving the pushing frame to move backward, and a docking mechanism for mounting the bar on the pushing frame;

the guide mechanism comprises a first chute (1) and a second chute (2) which are horizontally fixed on the frame, a fixed baffle (3) and a movable baffle (4) which are arranged at the notch of the second chute, and an opening and closing cylinder (5) for driving the movable baffle to horizontally move;

the reversing mechanism comprises a reversing motor (6), a driving wheel (7) arranged on a rotating shaft of the reversing motor, a pulley block arranged on the frame, a first connecting rope (8) encircling the driving wheel and the pulley block, and a limiting block (9) fixed with the first connecting rope;

the advancing mechanism comprises a reel (10) rotatably positioned at the left end of the frame, a counterweight (11) arranged below the frame, a second connecting rope (12) wound on the reel and connected with the pushing frame, and a third connecting rope (13) wound on the reel and connected with the counterweight;

the pushing frame comprises a pushing block (14) which is slidably positioned on the first connecting rope and is fixed with the second connecting rope, a pushing plate (15) which is vertically fixed at the bottom of the pushing block, and a sleeve (17) which is fixed with the pushing plate through a pushing rod (16) and can slide along the sliding chute; the front end of the sleeve is provided with a jack for inserting bar stock;

the butt joint mechanism comprises a pair of first air cylinders (18) and a pair of second air cylinders (19) which are sequentially arranged between the first sliding groove and the second sliding groove and are horizontally arranged, the first air cylinders are symmetrically fixed on two sides of the frame, the second air cylinders are axially and slidably symmetrically positioned on two sides of the frame through a connecting frame (20), a third air cylinder (21) is fixed at the bottom of the frame, a piston rod of the third air cylinder is fixed with the connecting frame, and clamping blocks (22) for clamping bars or sleeves are arranged on the first air cylinders and the second air cylinders;

the bar adding mechanism is arranged on the side surface of the frame and comprises a ratchet mechanism, a plurality of belt wheel mechanisms which are arranged in parallel to the length direction of the frame, a transmission shaft (A1) which is rotatably positioned on the first mounting plate and transmits power between the belt wheel mechanisms and the ratchet mechanism, and a release cylinder (A2) which drives the belt wheel mechanisms to move through the ratchet mechanism and the transmission shaft;

the belt wheel mechanism comprises a first mounting plate (A3) fixed with the side surface of the frame, a driving gear (A4) fixed on the transmission shaft, two belt wheels (A5) rotatably positioned on the first mounting plate, and a transmission belt (A6) sleeved on the two belt wheels; the conveyor belt is provided with single-sided teeth, and the driving gear is arranged below the conveyor belt and meshed with the single-sided teeth;

the release cylinder is fixed with the frame through a second mounting plate (A9); the ratchet mechanism comprises a ratchet wheel (A10) fixed on a transmission shaft, a cylinder push plate (A11) with one end rotatably positioned on the transmission shaft and the other end pushed by a release cylinder, a pawl (A12) rotatably positioned on the cylinder push plate and matched with the ratchet wheel, and a tension spring (A13) with two ends respectively applying tension to the second mounting plate and the pawl.

2. The bar stock loading device of claim 1, wherein: the clamping blocks are provided with a plurality of clamping jaws (22.1) which are arranged in a staggered manner up and down, and the clamping jaws of the two clamping blocks which are symmetrically arranged are also arranged in a staggered manner.

3. The bar stock loading device of claim 2, wherein: a material box (23) with a residual stub bar is arranged below the frame and the butt joint mechanism; the right-hand member of first spout is equipped with first sensor (24), and the left end of second spout is equipped with second sensor (25), is equipped with third sensor (26) on the magazine, is equipped with fourth sensor (31) on the fixed stop.

4. A bar stock loading device as recited in claim 3, wherein: the docking mechanism further comprises a fourth cylinder (27) located between the second cylinder and the second chute and arranged horizontally.

5. A bar stock loading apparatus as recited in claim 4, wherein: the pulley block comprises two first guide wheels (28) and two second guide wheels (29), wherein the first guide wheels are rotatably positioned at two ends of the frame around a vertical axis, and the second guide wheels are arranged above the driving wheels and are rotatably positioned at the side surface of the frame around a horizontal axis; the first connecting rope surrounds the first guide wheel, the second guide wheel and the driving wheel.

6. The bar stock loading device of claim 5, wherein: the advancing mechanism further comprises two third guide wheels (30) which are rotatably positioned on the side face of the frame around the horizontal axis, one end of each third connecting rope is wound on the corresponding winding wheel rim, the other end of each third connecting rope is connected with the corresponding counterweight after bypassing the corresponding third guide wheel, and accordingly pushing force is provided for the pushing frame for pushing the bar through the second connecting rope wound on the corresponding winding wheel rim.

7. The bar stock loading device of claim 6, wherein: a positioning plate (A7) for keeping the bar position is arranged above a right belt wheel of the belt wheel mechanism, and a guide plate (A8) for guiding the bar rolling position is arranged below the right belt wheel of the belt wheel mechanism; the positioning plate is in a circular arc shape which is matched with the shape of the belt wheel; the guide plates are arranged obliquely.

8. The bar stock loading device of claim 7, wherein: the axis of the belt wheel is parallel to the length direction of the frame.

9. The bar stock loading device of claim 8, wherein: a sliding groove (A11.1) is formed in the cylinder pushing plate, a cylinder pushing rod (A14) penetrating through the sliding groove is fixed on a piston rod of the release cylinder, and a pair of clamping blocks (A15) for pushing and pulling the pushing plate are arranged on the pushing rod.

10. The bar stock loading device of claim 9, wherein: a baffle (A16) is arranged between the belt wheel mechanism and the ratchet mechanism; the baffle is fixed with the frame through a third mounting plate.