Automatic sheath extraction fixture, equipment and method

Abstract

An automatic sleeve extraction fixture, equipment and method include a sleeve extraction station located on a transmission line, a multi-axis robot and an automatic sleeve extraction fixture are configured on one side of the sleeve extraction station, the automatic sleeve extraction fixture includes a frame, a mounting flange connected to the output shaft of the robot is provided on the frame, at least one clamping part is arranged around the mounting flange, the clamping part has a clamping cylinder, a guide plate mounted on the end of the clamping cylinder, two clamping claws mounted on the guide plate and synchronously moving toward each other along the guide groove of the guide plate, and two clamping members respectively fixed to the two clamping claws, and the ends of the two clamping members are respectively provided with notches so that the two clamping members form a clamping opening for clamping the sleeve to be extracted when they are closed. The present invention realizes the automatic extraction of the valve sleeve through the automatic sleeve extraction fixture and the multi-axis robot, which is faster, more efficient and has a lower damage rate than manual sleeve extraction, and effectively solves the problems of low efficiency and employee fatigue in manual disassembly of the stop valve sleeve.

Description

Technical Field

[0001] The invention relates to the field of production and assembly of an air conditioner outdoor unit, and in particular to an automatic sheath extraction fixture, equipment and method. Background Art

[0002] During the production and assembly process of the air conditioner outdoor unit, the valve (stop valve) is equipped with a dust cap or sleeve to prevent dust and other impurities from entering and contaminating the internal pipeline. When entering the valve and pipeline production and assembly link, the dust cap or sleeve on the valve needs to be removed. In traditional technology, the original method of disassembling the valve sleeve and the compressor sleeve is to manually disassemble them with wire cutters. When the sleeve is too tight, the contact surface of the wire cutters clamping the sleeve is small, making it difficult to disassemble. Employees wear double-layer protective gloves and use wire cutters to clamp the part of the sleeve that is not inserted into the valve or the compression sleeve part and pull it out. When pulling out the pipe, it is necessary to consider that the direction of force should be consistent with the direction of the pipeline, otherwise the force is too large to achieve the expected effect. It may also damage other parts due to excessive force and inability to control the wire cutters. The use of wire cutters to clamp the sleeve as a whole for disassembly is difficult to accurately control the pressure, which is easy to damage the valve thread or the compressor inlet and outlet pipes. In addition, manual disassembly for a long time is prone to fatigue and hand pain, which cannot meet the growing demand for production changes.

[0003] Therefore, it is necessary to design an automatic sleeve extraction fixture, equipment and method to realize the automatic disassembly of the valve sleeve and the compressor sleeve. Summary of the invention

[0004] In view of one or more problems in the traditional technology that it is difficult to grasp the extraction direction and clamping force of the valve sleeve, the present invention provides an automatic sleeve extraction clamp, equipment and method. The clamping claw cylinder of the automatic sleeve extraction clamp synchronously clamps and extracts the valve sleeve, thereby realizing automatic sleeve extraction, reducing the labor intensity of employees and improving production efficiency.

[0005] To achieve the above-mentioned purpose, the present invention selects the following technical scheme: an automatic sheath extraction clamp, comprising a frame, the frame is provided with an assembly flange connected to the output shaft of the multi-axis robot, at least one clamping part is arranged around the assembly flange, the clamping part has a clamping cylinder, a guide plate mounted on the end of the clamping cylinder, two clamping jaws mounted on the guide plate and moving synchronously toward each other along the guide groove of the guide plate, and two clamping members respectively fixed on the two clamping jaws, the ends of the two clamping members are respectively provided with notches so that the two clamping members form a clamping opening for clamping the sheath to be extracted when they are closed.

[0006] Preferably, a pushing portion is provided on the outer side of the clamping portion, and the pushing portion has a first fixed block fixed on one side of the clamping cylinder, a second fixed block locked on the first fixed block, and a pushing cylinder locked on the second fixed block, and the push rod of the pushing cylinder faces the clamping port so that the clamping port extends out and abuts against the hole at the end of the sheath to be pulled out when the clamping port is closed to clamp the sheath to be pulled out.

[0007] Preferably, the radius of the arc surface of the notch is smaller than the radius of the outer circular surface of the clamped portion of the sheath to be removed, and the clamping opening formed by the two notches when the two clamping members are closed is in an incomplete circle.

[0008] On the other hand, the present invention adopts the following technical scheme: an automatic sheath pulling device, comprising a sheath pulling station located on a transmission line, a multi-axis robot is arranged on one side of the sheath pulling station, and the multi-axis robot is arranged on the above-mentioned automatic sheath pulling fixture.

[0009] Preferably, the sheath pulling station has a transmission positioning assembly and a translation positioning assembly configured on the transmission line, the transmission positioning assembly has a lifting seat located below between the rollers of the transmission line and a front baffle rising from the lifting seat, the front baffle is used to rise from below between the rollers to position the workpiece to be sheathed in the sheath pulling station during the transmission process.

[0010] Preferably, the translation positioning assembly comprises a fixed stop bar located on one side of the transmission line close to the automatic sheath pulling fixture and a positioning push block on the other side away from the fixed stop bar, and the positioning push block is used to push the workpiece to be sheathed toward the fixed stop bar so that the workpiece to be sheathed is positioned at a specified position of the sheath pulling station.

[0011] Preferably, the sheath extraction station also includes a extraction blocking assembly, which includes a blocking base fixed on one side of the transmission line, a blocking slider arranged on the blocking base and moving toward or retreating toward the transmission line, and a blocking baffle arranged on the blocking slider, and the blocking baffle is moved toward the transmission line by the blocking slider to abut against the valve side of the workpiece to be extracted from the sheath.

[0012] Preferably, a material drop bin is further included, which is arranged on one side of the multi-axis robot and is used to receive the sheath extracted by the automatic sheath extraction fixture from the valve of the workpiece to be extracted.

[0013] On the other hand, the present invention adopts the following technical scheme: an automatic sheath extraction method, comprising the following steps:

[0014] The workpiece to be jacketed runs on the transmission line and enters the jacketing station;

[0015] The transmission positioning component raises the front baffle between the two rollers of the transmission line to block the jacket workpiece to be pulled out so as to limit the movement in the transmission direction, and positions the jacket workpiece to be pulled out by using the front baffle as the first positioning reference;

[0016] The translation positioning component pushes the to-be-pulled sheath workpiece toward the fixed stop bar with a positioning push block, and positions the to-be-pulled sheath workpiece with the fixed stop bar as a second positioning reference;

[0017] The extraction blocking assembly drives the blocking slider to make the blocking baffle abut against the valve of the jacket workpiece to be extracted to prevent the air conditioner outdoor unit from being pulled over when the jacket is extracted;

[0018] The multi-axis robot controls the automatic jacket extraction fixture at multiple angles to extract the jacket of the air conditioner outdoor unit valve on the jacket extraction workpiece;

[0019] After the valve sleeve is extracted, the automatic sleeve extraction fixture moves to the top of the drop bin, opens the clamping part to allow the sleeve to fall into the drop bin, and continues to extract the sleeve of the next workpiece to be extracted.

[0020] Preferably, the multi-axis robot controls the automatic jacket extraction fixture at multiple angles to extract the jacket of the air conditioner outdoor unit valve on the jacket extraction workpiece, including:

[0021] One of the clamping parts of the automatic sheath extraction fixture is driven by a multi-axis robot to move to the valve of the workpiece to be sheathed, and moves until the two notches of the clamping part are located outside the valve sheath so that the axis of the clamping opening formed by the two notches is coaxial with the axis of the valve;

[0022] The claw cylinder of the clamping part is started, and the two clamping parts are closed to form a clamping mouth to clamp the valve sleeve. At the same time, the ejecting cylinder of the ejecting part is started, and the ejector rod is extended into the hole of the valve sleeve to improve the stability of extracting the sleeve;

[0023] The multi-axis robot controls the automatic sleeve extraction to extract the sleeve connected to the valve outward in the axial direction of the valve. After the sleeve is extracted, the multi-axis robot controls another clamping part of the automatic sleeve extraction fixture to extract another valve sleeve of the workpiece to be extracted, until the extraction of multiple valve sleeves is completed.

[0024] Compared with the prior art, the present invention has the following beneficial effects: the automatic extraction of the valve sleeve is achieved by means of an automatic sleeve extraction fixture in conjunction with the action of a multi-axis robot, which is faster, more efficient and has a lower damage rate than manual sleeve extraction, and effectively solves the problems of low efficiency and employee fatigue in manual disassembly of stop valves and compressor sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution, the drawings required for use in the implementation will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a schematic diagram of the structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the present invention.

[0028] Figure 3 This is a structural diagram of implementation case 2. DETAILED DESCRIPTION

[0029] In order to enable a clear and complete understanding of the technical solution, the present invention is further described in conjunction with the embodiments and drawings. Obviously, the described embodiments are only some embodiments of the present invention, and all other embodiments obtained by technicians in the relevant field without making creative work are within the scope of protection of the present invention.

[0030] Implementation case 1:

[0031] like Figure 1 and Figure 2 As shown, an automatic sheath extraction fixture includes a frame 100, on which is provided an assembly flange 110 connected to the output shaft of a multi-axis robot 200, three clamping parts 120 are arranged around the assembly flange 110, and the clamping parts have a clamping claw cylinder 121, a guide plate 122 assembled at the end of the clamping claw cylinder 121, two clamping claws 123 assembled on the guide plate 122 and synchronously moving toward each other along the guide groove of the guide plate 122, and two clamping members 124 respectively fixed to the two clamping claws 123, and the ends of the two clamping members 124 are respectively provided with notches 125 so that the two clamping members 124 form a clamping opening for clamping the sheath to be extracted when they are closed. The clamping cylinder, guide plate and two clamping jaws are components of flat pneumatic fingers, so that the two clamping jaws move toward each other on the guide plate and close when the clamping cylinder is started. The two clamping parts are made of aluminum alloy material. The hardness of aluminum alloy material is softer than that of copper and iron, and it does not damage other parts. The wear resistance is moderate and meets the design requirements of the fixture material. By changing the material of the clamping part in contact with the sheath, it can be fully in contact with the sheath without damaging the valve thread or the compressor inlet and outlet pipes.

[0032] A pushing portion 130 is provided on the outer side of the clamping portion 120, and the pushing portion 130 has a first fixed block 131 fixed to one side of the clamping cylinder 121, a second fixed block 132 locked on the first fixed block 131, and a pushing cylinder 133 locked on the second fixed block 132, and the push rod of the pushing cylinder 133 faces the clamping port so that the clamping port extends out and abuts against the hole at the end of the sheath to be pulled out when the clamping port is closed to clamp the sheath to be pulled out.

[0033] The radius of the arc surface of the notch is smaller than the radius of the outer circular surface of the clamped part of the sheath to be pulled out, which is 0.5mm-1mm smaller. When the two clamping parts are closed, the clamping opening formed by the two notches is not a complete circle. When the clamping claw cylinder is actuated, the two clamping parts are closed to increase the firmness of the clamped sheath. The clamping opening designed with a smaller size has a greater force to clamp the sheath more firmly. Therefore, the clamping opening formed by the two notches after closing is not a complete circle.

[0034] When executing the sleeve extraction, one of the clamping parts 120 of the automatic sleeve extraction fixture is driven by the multi-axis robot 200 to run to the valve of the workpiece to be sleeved, and runs until the two recesses of the clamping part 120 are located outside the valve sleeve so that the axis of the clamping mouth formed by the two recesses is coaxial with the axis of the valve; the clamping claw cylinder of the clamping part is started, and the two clamping parts are closed to form a clamping mouth to clamp the valve sleeve, and at the same time, the pushing cylinder of the pushing part is started, and the push rod is extended into the hole of the valve sleeve to improve the stability of extracting the sleeve; the multi-axis robot controls the automatic sleeve extraction to extract the sleeve connected to the valve outward in the axial direction of the valve, and after the sleeve is extracted, the multi-axis robot controls the other clamping part of the automatic sleeve extraction fixture to extract another valve sleeve of the workpiece to be sleeved, until the extraction of multiple valve sleeves is completed.

[0035] Implementation case 2:

[0036] like Figure 1-3 As shown, an automatic sheath pulling device includes a sheath pulling station located on a transmission line 300, a multi-axis robot 200 is arranged on one side of the sheath pulling station, and an automatic sheath pulling fixture of the first embodiment is arranged on the multi-axis robot.

[0037] The sheath pulling station has a transmission positioning assembly 310 and a translation positioning assembly 320 configured on the transmission line 300, the transmission positioning assembly 310 has a lifting seat located below between the rollers 301 of the transmission line 300 and a front baffle 311 rising from the lifting seat, the front baffle 311 is used to rise from below between the rollers to position the workpiece 400 to be sheathed in the sheath pulling station during the transmission process.

[0038] The translation positioning assembly 320 includes a fixed stop bar 321 located on one side of the transmission line close to the automatic sheath pulling fixture and a positioning push block 322 located on the other side away from the fixed stop bar 321. The positioning push block 322 is used to push the sheath-pulling workpiece 400 toward the fixed stop bar 321 so that the sheath-pulling workpiece 400 is positioned at a specified position of the sheath pulling station.

[0039] The sheath extraction station also includes an extraction blocking assembly, which includes a blocking base 331 fixed to one side of the transmission line 300, a blocking slider 332 disposed on the blocking base 331 and moving toward or retreating from the transmission line, and a blocking baffle 333 disposed on the blocking slider 332. The blocking baffle 333 is moved toward the transmission line 300 by the blocking slider 332 and abuts against the valve side of the sheath workpiece 400 to be extracted.

[0040] The robot 200 further comprises a material drop bin 500 , which is arranged at one side of the multi-axis robot 200 and is used to receive the sheaths extracted from the valves of the workpieces to be extracted by the automatic sheath extraction fixture.

[0041] When performing sheath pulling in the present embodiment, the sheath pulling workpiece 400 runs on the transmission line and enters the sheath pulling station; the transmission positioning component raises the front baffle 311 between the two rollers of the transmission line to block the sheath pulling workpiece to be pulled so as to limit the movement in the transmission direction, and uses the front baffle as the first positioning reference to position the sheath pulling workpiece, the translation positioning component pushes the sheath pulling workpiece 400 toward the fixed stop bar 321 with the positioning push block 322, and uses the fixed stop bar 321 as the second positioning reference to position the sheath pulling workpiece, and the extraction blocking component drives the blocking slider to make the blocking baffle 333 abut against the valve of the sheath pulling workpiece to prevent the air conditioner outdoor unit from being pulled over when the sheath is pulled out.

[0042] One of the clamping parts 120 of the automatic sleeve extraction fixture is driven by the multi-axis robot 200 to run to the valve of the sleeve workpiece to be extracted, and runs until the two notches of the clamping part 120 are located outside the valve sleeve so that the axis of the clamping mouth formed by the two notches is coaxial with the axis of the valve; the claw cylinder of the clamping part is started, and the two clamping parts are closed to form a clamping mouth to clamp the valve sleeve, and at the same time, the pushing cylinder of the pushing part is started, and the push rod is extended into the hole of the valve sleeve to improve the stability of extracting the sleeve; the multi-axis robot controls the automatic sleeve extraction to extract the sleeve connected to the valve outward in the axial direction of the valve. After the extraction of the sleeve is completed, the multi-axis robot controls another clamping part of the automatic sleeve extraction fixture to extract another valve sleeve of the sleeve workpiece to be extracted, until the extraction of multiple valve sleeves is completed.

[0043] After the valve sheath is extracted, the automatic sheath extraction fixture moves to the top of the drop bin 500, opens the clamping part to allow the sheath to fall into the drop bin 500. As a further improvement of this embodiment, the ejector rod of the ejector part can be provided with a blowing hole, so that the dust cap or the sheath can be blown when the clamped part is loose, ensuring that the sheath can be separated from the ejector rod or the clamping part and fall into the drop bin. Continue to extract the sheath of the next workpiece to be extracted.

[0044] The above disclosure is only one or more preferred embodiments of the present invention, which are used to help understand the inventive concept of the technical solution, and is not intended to limit the present invention in other forms. Technical personnel in the relevant field may make other equivalent or customary replacement schemes based on the features defined by the present invention, which still fall within the scope of the present invention.

Claims

1. An automatic sheath removal fixture, comprising a frame, characterized in that: The frame is provided with an assembly flange connected to the output shaft of the multi-axis robot, and at least one clamping part is arranged around the assembly flange. The clamping part has a clamping cylinder, a guide plate assembled at the end of the clamping cylinder, two clamping jaws assembled on the guide plate and moving synchronously toward each other along the guide groove of the guide plate, and two clamping members respectively fixed on the two clamping jaws, and the ends of the two clamping members are respectively provided with notches so that the two clamping members form a clamping opening for clamping the sheath to be pulled out when they are closed, the arc surface radius of the notch is smaller than the radius of the outer circular surface of the clamped part of the sheath to be pulled out, and the clamping opening formed by the two notches when the two clamping members are closed is an incomplete circle.

2. The automatic sheath extraction fixture according to claim 1, characterized in that: A pushing portion is provided on the outer side of the clamping portion, and the pushing portion has a first fixed block fixed to one side of the clamping cylinder, a second fixed block locked on the first fixed block, and a pushing cylinder locked on the second fixed block. The push rod of the pushing cylinder faces the clamping port so that the clamping port extends out and abuts against the hole at the end of the sheath to be pulled out when the clamping port is closed to clamp the sheath to be pulled out.

3. An automatic sheath removal device, characterized in that: It comprises a jacket pulling station located on the transmission line, wherein a multi-axis robot is configured on one side of the jacket pulling station, and the multi-axis robot is configured with an automatic jacket pulling fixture according to any one of claims 1 to 2; The sheath extraction station also includes an extraction blocking assembly, which includes a blocking base fixed to one side of the transmission line, a blocking slider arranged on the blocking base and moving toward or retreating from the transmission line, and a blocking baffle arranged on the blocking slider. The blocking baffle is moved toward the transmission line by the blocking slider and abuts against the valve side of the workpiece to be sheathed.

4. The automatic sheath removal device according to claim 3, characterized in that: The sheath pulling station has a transmission positioning assembly and a translation positioning assembly configured on the transmission line, the transmission positioning assembly has a lifting seat located below between the rollers of the transmission line and a front baffle rising from the lifting seat, the front baffle is used to rise from below between the rollers to position the workpiece to be sheathed in the sheath pulling station during the transmission process.

5. The automatic sheath removal device according to claim 4, characterized in that: The translation positioning assembly includes a fixed stop bar located on one side of the transmission line close to the automatic sheath pulling fixture and a positioning push block on the other side away from the fixed stop bar. The positioning push block is used to push the workpiece to be sheathed toward the fixed stop bar so that the workpiece to be sheathed is positioned at a specified position of the sheath pulling station.

6. The automatic sheath removal device according to claim 3, characterized in that: The robot also includes a blanking bin, which is arranged on one side of the multi-axis robot and is used to receive the sheaths pulled out by the automatic sheath pulling fixture from the valve of the workpiece to be sheathed.

7. An automatic sheath removal method, characterized in that: The following steps are involved: The workpiece to be jacketed is transported along the conveyor line and enters the jacketing station; The transmission positioning assembly raises a front baffle between two rollers of the transmission line to block the jacket workpiece to be pulled out so as to limit the movement in the transmission direction, and positions the jacket workpiece to be pulled out using the front baffle as a first positioning reference; The translation positioning assembly pushes the to-be-pulled sheath workpiece toward the fixed stop bar with a positioning push block, and positions the to-be-pulled sheath workpiece with the fixed stop bar as a second positioning reference; The extraction blocking assembly drives the blocking slider to make the blocking baffle abut against the valve of the jacket workpiece to be extracted to prevent the air conditioner outdoor unit from being pulled over when the jacket is extracted; The multi-axis robot controls the automatic jacket extraction fixture at multiple angles to extract the jacket of the air conditioner outdoor unit valve from the jacket-extracting workpiece; After completing the extraction of the valve sleeve, the automatic sleeve extraction fixture moves to the top of the blanking bin, opens the clamping part to allow the sleeve to fall into the blanking bin, and continues to extract the sleeve of the next workpiece to be sleeved.

8. The automatic sheathing removal method according to claim 7, characterized in that: The multi-axis robot controls the automatic jacket extraction fixture at multiple angles to extract the jacket of the air conditioner outdoor unit valve on the jacket-extracting workpiece, including: One of the clamping parts of the automatic sheath extraction fixture is driven by a multi-axis robot to move to the valve of the workpiece to be sheathed, and moves until the two recesses of the clamping part are located outside the valve sheath so that the axis of the clamping opening formed by the two recesses is coaxial with the axis of the valve; The claw cylinder of the clamping part is started, and the two clamping parts are closed to form a clamping mouth to clamp the valve sleeve. At the same time, the ejecting cylinder of the ejecting part is started, and the ejector rod is extended into the hole of the valve sleeve to improve the stability of extracting the sleeve; The multi-axis robot controls the automatic sleeve extraction to extract the sleeve connected to the valve outward in the axial direction of the valve. After the sleeve is extracted, the multi-axis robot controls the other clamping part of the automatic sleeve extraction fixture to extract another valve sleeve of the workpiece to be extracted, until the extraction of multiple valve sleeves is completed.

Images