CN113370250A - Locking stress part of tool quick-change device and processing technology thereof - Google Patents
Locking stress part of tool quick-change device and processing technology thereof Download PDFInfo
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- CN113370250A CN113370250A CN202110748949.XA CN202110748949A CN113370250A CN 113370250 A CN113370250 A CN 113370250A CN 202110748949 A CN202110748949 A CN 202110748949A CN 113370250 A CN113370250 A CN 113370250A
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- 230000008859 change Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 7
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims abstract description 5
- 238000010791 quenching Methods 0.000 claims description 32
- 230000000171 quenching effect Effects 0.000 claims description 32
- 238000005496 tempering Methods 0.000 claims description 20
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- 238000004140 cleaning Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000002161 passivation Methods 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 239000012636 effector Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
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- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 3
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J15/00—Gripping heads and other end effectors
- B25J15/04—Gripping heads and other end effectors with provision for the remote detachment or exchange of the head or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention relates to the technical field of quick change devices, in particular to a locking stressed part of a quick change device of a tool and a processing technology thereof, and the locking stressed part comprises a piston disc, a piston rod, a locking cam, a flange plate, a locking ring, locking balls and a locking seat, wherein the locking stressed part is made of martensitic stainless steel materials, the locking stressed part is arranged on an upper connecting disc, the piston disc is movably connected in an inner cavity formed in the upper connecting disc, the piston disc is fixedly provided with the locking cam through the piston rod, the opening of the inner cavity is fixedly provided with the locking ring through the flange plate, the locking rings are movably connected with a plurality of locking balls, a lower connecting disc matched with the upper connecting disc is arranged below the upper connecting disc, the axis of the lower connecting disc is fixedly provided with the locking seat, and the locking cam is pressed to clamp the locking balls on the locking seat, so that the quick change device is quickly locked and replaced, and the antirust paint has high hardness and good antirust effect, and has wide application prospect in the technical field of quick change devices.
Description
Technical Field
The invention relates to the technical field of quick change devices, in particular to a locking stressed part of a tool quick change device and a processing technology thereof.
Background
A quick change device for a robot, namely a tool quick change disc, a gun change disc and the like, is a flexible connecting tool used in an end effector in the industrial robot industry. The quick-change device is composed of an upper connecting disc and a lower connecting disc, one upper connecting disc is usually fixed on the mechanical arm, the end effectors with different functions are fixed on the plurality of lower connecting discs, and when the mechanical arm is used, different equipment is operated after the mechanical arm is changed through quick change of the upper connecting disc and the lower connecting discs. In the prior art, the locking parts of the upper connecting disc and the lower connecting disc are inconvenient to disassemble and assemble, the hardness is low, the locking parts are easy to oxidize and rust, and the service life of the locking parts is seriously shortened, so that a device for solving the problems is needed.
Disclosure of Invention
The invention discloses a locking stressed part of a tool quick-change device and a processing technology thereof, and aims to solve the problems that in the prior art, locking parts of an upper connecting disc and a lower connecting disc are inconvenient to disassemble and assemble, low in hardness, easy to oxidize and rust and seriously shortened in service life.
The technical scheme of the invention is that the locking device comprises a piston disc, a piston rod, a locking cam, a flange plate, a locking ring, a locking ball and a locking seat, wherein a locking stress part is arranged on an upper connecting disc connected with a mechanical arm, the piston disc is movably connected in an inner cavity arranged in the upper connecting disc, the side walls of the upper end and the lower end of the inner cavity are communicated with a locking air inlet and a loosening air inlet, the inner cavity is movably connected with the piston disc, a return spring is fixed between the piston disc and the inner cavity, the piston rod is fixed on the piston disc, the locking cam is fixed at one end of the piston rod far away from the piston disc, the flange plate is fixed on the upper connecting disc at the opening of the inner cavity, the locking ring is fixed on the flange plate, the locking ring is movably connected with a plurality of locking balls which are uniformly arranged in an annular array, and a lower connecting disc matched with the upper connecting disc is arranged below the upper connecting disc and connected with an end effector, the locking hole is formed in the axis of the lower connecting disc, and the locking seat is fixed at the locking hole to form a structure that the locking cam presses the locking ball to be clamped on the locking seat when the piston disc pushes the piston rod to move, so that the upper connecting disc and the lower connecting disc are locked;
the locking stress components are made of martensitic stainless steel materials, the Rockwell hardness of the locking stress components is HRC56-HRC60, and the salt spray resistance is salt spray 95H-salt spray 100H;
the preparation method of the locking stressed component comprises the following steps:
s1 material pretreatment and cleaning: cleaning the blank in an ultrasonic cleaning machine to remove surface attachments; deoiling: putting the cleaned blank into a pool of a deoiling cleaning agent for deoiling treatment, and finally washing the blank with clear water;
s2, rough machining, namely, roughly machining each stress part by using a rough machining lathe, wherein the single edge of each machined surface is left with a margin of 1 mm;
s3, hardening and tempering intermediate treatment and quenching: conveying the rough machined parts of all stressed parts into a quenching furnace, heating to 1000-1100 ℃, taking the workpieces out of the quenching furnace, and performing integral water quenching, wherein the water temperature is 27-33 ℃; tempering: feeding the quenched rough workpiece into a tempering furnace, heating to 480-520 ℃, taking out of the tempering furnace, and then air-cooling;
s4, semi-finishing, namely semi-finishing each stressed part by using a semi-finishing lathe, wherein the single edge of each machined surface is left with a margin of 0.4 mm; s5 quenching treatment, namely quenching: quenching the semi-finished parts of each stressed part in a quenching medium at the temperature of 1000-1200 ℃; tempering: tempering the cooled semi-finished parts of the stressed parts in a quenching medium at the temperature of 560-600 ℃ for 2.5-2.8 hours, and then taking out for air cooling;
s6, carrying out cryogenic treatment, namely carrying out cryogenic treatment on the semi-finished parts of the stress components in liquid nitrogen at the temperature of-170 to-180 ℃ for 4.5 hours; after the deep cooling treatment, naturally placing the semi-finished parts of all the stress components to return to the room temperature;
s7, finishing, namely finishing each stressed part by using a finishing lathe;
s8 passivation treatment and cleaning: cleaning the precision machined parts of all the stress parts in an ultrasonic cleaning machine to remove impurities; deoiling: putting the cleaned precision machined parts of each stressed part into a water tank of a deoiling cleaning agent for deoiling treatment, and finally washing the precision machined parts by using clear water; passivation: soaking the cleaned and deoiled finish-machined parts of each stress part in a passivator formed by fully mixing Na2Cr2O7 & 2H2O (20-30 g/L) and 65% HNO3 (300-500 g/L) for 0.5 hour; and (3) sealing: and (3) putting the finished parts of the stress parts after passivation treatment into a drying furnace formed by mixing 20-40% of Al, 50-70% of FeAl, 5-8% of rare earth oxide and 0.4-2% of NH4Cl for 1.5 hours.
Preferably, a plurality of limiting holes which are uniformly arranged in an annular array are formed in the locking ring, the locking balls are movably connected in the limiting holes, and the diameter of one end, close to the outside, of each limiting hole is smaller than that of each locking ball.
Preferably, the locking cam comprises an upper inclined plane, a middle inclined plane and a lower inclined plane, an included angle between the upper inclined plane and the middle inclined plane is larger than 90 degrees, an included angle between the middle inclined plane and the lower inclined plane is smaller than 90 degrees, an included angle between the upper inclined plane and the piston rod is smaller than an included angle between the lower inclined plane and the piston rod, and an arc-shaped transition surface is arranged between the middle inclined plane and the lower inclined plane.
At present, a first sealing ring is fixed on the side end face of the piston disc, and a second sealing ring is fixed at an opening of the piston rod penetrating through the inner cavity.
At present, the inner cavity of the piston disc is divided into an upper cavity and a lower cavity, and the air inlet is locked and the air inlet is loosened to be respectively communicated with one cavity.
Preferably, the rockwell hardness of the locking force-receiving part is HRC 58.
Preferably, the salt fog resistance of the locking stress part is salt fog 96H.
Preferably, the quenching temperature in the quenching treatment process of S5 is 1060 ℃ and the tempering temperature is 585 ℃.
The technical scheme of the invention can achieve the following beneficial effects: (1) through the inner cavity, the piston disc, the locking air inlet and the loosening air inlet, ventilation from the locking air inlet or the loosening air inlet to the embedded inner is facilitated, and the piston disc moves in the inner cavity; (2) through the piston rod, the locking cam, the locking ring, the locking ball and the locking seat, the locking cam is enabled to press the locking ball to move in the locking ring under the condition that the piston disc drives the piston rod to move, and then the locking ring is clamped between the locking cam and the locking seat, so that the upper connecting disc is locked and connected with the lower connecting disc; (3) the locking stressed component with Rockwell hardness of HRC58 can be obtained by adopting a martensitic stainless steel material to manufacture the retraction hand part and a processing technology of the locking stressed component, and the locking stressed component can pass a 96H salt spray test, so that the locking stressed component has high hardness and is corrosion-resistant; the technical scheme of the invention has wide application prospect in the technical field of quick change devices.
Drawings
Fig. 1 is a cross-sectional view of a locking stressed member of a quick tool change device and a process for treating the locking stressed member of the quick tool change device.
Fig. 2 is an enlarged view of the area a in fig. 1.
Fig. 3 is an expanded schematic view of the locking stressed part of the quick tool change device and the locking stressed part of the processing technology thereof.
The locking device comprises a locking base, a locking ring, a locking ball, a locking hole, a locking ring, a locking ball, a piston disc, a locking ring, a piston disc, a locking ball, a piston disc, a locking hole, a piston disc, a locking ring, a limiting hole, a locking ball, a locking hole, a locking seat, a locking hole, a locking seat, a locking hole, and a locking hole, a locking hole.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present invention, and in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and "third" 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 being noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The locking stressed part of the tool quick-change device shown in fig. 1-2 comprises a piston disc 6, a piston rod 11, a locking cam 12, a flange disc 13, a locking ring 14, a locking ball 16 and a locking seat 18, wherein the locking stressed part is arranged on an upper connecting disc 1 connected with a mechanical arm, a lower connecting disc 2 which is matched with the upper connecting disc 1 and is connected with an end effector is arranged below the upper connecting disc 1, the upper connecting disc 1 is driven by the mechanical arm to move, the upper connecting disc 1 and the lower connecting disc 2 are connected together through the locking stressed part, the mechanical arm is further connected with the end effector, and the end effector is driven to move through the movement of the mechanical arm. Piston dish 6 swing joint is in the inner chamber 3 of seting up in last connection pad 1, and piston dish 6 is divided into two upper and lower cavities with inner chamber 3, and locks air inlet 4 and loosens air inlet 5 and communicate a cavity respectively, is convenient for carry or the exhaust air makes piston dish 6 slide from top to bottom in the cavity through locking air inlet 4 and loosening air inlet 5. A first clamping groove 7 is formed in the side end face of the piston disc 6, a first sealing ring 8 is fixedly clamped in the first clamping groove 7, a gap between the side end face of the piston disc 6 and the side wall of the inner cavity 3 is conveniently sealed through the first sealing ring 8, and then the air inlet 4 is conveniently locked, and the air inlet 5 is conveniently loosened to convey or discharge air into the cavity so that the piston disc 6 can slide up and down in the cavity. The piston disc 6 and the inner cavity 3 are detachably connected with a return spring through screw fixation, so that the return spring provides elastic force for the piston disc 6, and the piston disc 6 can be located in the middle of the inner cavity 3 when the air inlet 4 is not locked and the air inlet 5 is loosened to convey or discharge air into the cavity. The piston disc 6 is welded or in threaded connection with a piston rod 11, one end, far away from the piston disc 6, of the piston rod 11 is welded or in threaded connection with a locking cam 12, so that the piston disc 6 and the locking cam 12 are connected together through the piston rod 11, and the locking cam 12 is driven to move under the condition that the piston disc 6 moves. Piston rod 11 runs through the opening part of inner chamber 3 and has seted up second joint groove 9, and the joint is fixed with second sealing washer 10 inner chamber 3 in the second joint groove 9, is convenient for carry out the shutoff through the gap of second sealing washer 10 with piston rod 11 and 3 opening parts of inner chamber, leaks from the gap of piston rod 11 with 3 opening parts of inner chamber when avoiding loosening air inlet 5 and carrying air in to inner chamber 3, and then influences the removal of piston disc 6 in inner chamber 3. The upper connecting disc 1 at the opening of the inner cavity 3 is detachably connected with a flange 13 through bolt fixation, and a locking ring 14 is fixedly welded on the flange 13, so that the locking ring 14 is conveniently connected with the upper connecting disc 1 through the flange 13. The locking ring 14 is provided with a plurality of limiting holes 15 which are uniformly arranged in an annular array, and the locking ball 16 is movably connected in the limiting holes 15, so that the locking ball 16 can move in the limiting holes 15 conveniently. The diameter of the end, close to the outside, of the limiting hole 15 is smaller than that of the locking ball 16, and the side end face of the lowest end of the locking cam is located above the side of the locking ball after the locking cam is contracted into the locking ring, so that the limiting ball can be prevented from being separated from the limiting hole 15, and the locking ball can be conveniently pushed to move in the limiting hole. Locking hole 17 has been seted up in the axle center of lower connection pad 2, locking hole 17 department can dismantle the annular locking seat 18 of circle through the bolt fastening, the section of locking seat 18 is the type of falling L, and the terminal surface tilt up setting that is close to the inner circle, constitute locking cam 12 oppression locking ball 16 joints when piston disc 6 promotes piston rod 11 and removes on locking seat 18, go up the structure of connection pad 1 and lower connection pad 2 locking, be convenient for oppress the recess of locking ball 16 to locking seat 18 through locking cam 12, the joint of connection pad 1 and lower connection pad 2 is connected in the realization, and the quick replacement of being convenient for. The locking stress part is made of martensitic stainless steel, the Rockwell hardness of the locking stress part is HRC56-HRC60, particularly HRC58, the Rockwell hardness of the locking stress part is higher than that of most locking stress parts in the prior art, the locking stress part is more corrosion-resistant, the locking stress part can realize 300-thousand locking force and repeated precision guarantee, and the service life of the locking stress part is prolonged. The salt fog resistance of the locking stress-bearing component is 95H-100H, specifically 96H, so that the locking stress-bearing component is more resistant to corrosion and oxidation, can be effectively prevented from rusting, and the service life of the locking stress-bearing component is prolonged.
As shown in fig. 1-2, the locking force-receiving member of the quick tool change device, the locking cam 12 is composed of an upper inclined surface 101, a middle inclined surface 102 and a lower inclined surface 103, an included angle between the upper inclined surface 101 and the middle inclined surface 102 is greater than 90 °, an included angle between the middle inclined surface 102 and the lower inclined surface 103 is less than 90 °, an included angle between the upper inclined surface 101 and the piston rod 11 is less than an included angle between the lower inclined surface 103 and the piston rod 11, a maximum diameter of a portion where the upper inclined surface 101 is located is greater than a diameter of a portion where the middle inclined surface 102 is located, a maximum diameter of a portion where the middle inclined surface 102 is located is greater than a diameter of a portion where the lower inclined surface 103 is located, so that when the piston disc 6 drives the locking cam 12 to move downward, the lower inclined surface 103 first presses the locking ball 16 to move in the limiting hole 15 until the lower inclined surface 103 moves to a lower side of a middle portion of the locking ball 16, and when the locking cam 12 continues to move downward, the upper inclined surface 101 pushes the locking ball 16 to continue to move in the limiting hole 15, until the locking ball 16 is snapped into the locking groove formed in the locking seat 18. An arc-shaped transition surface is arranged between the middle inclined surface 102 and the lower inclined surface 103, so that the locking ball 16 can conveniently pass through the boundary between the middle inclined surface 102 and the lower inclined surface 103.
When in locking, the locking cam 12 is positioned above the locking ball 16, after the upper connecting disc 1 is contacted with the lower connecting disc 2, the locking air inlet 4 is ventilated, the air inlet 5 is loosened to exhaust, the air pressure pushes the piston disc 6 to move downwards in the inner cavity 3, the piston disc 6 drives the piston rod 11 and the locking cam 12 to move downwards, when the lower inclined plane 103 on the locking cam 12 is contacted with the locking ball 16, the locking ball 16 is pushed to move outwards in the limiting hole 15 until the lower inclined plane 103 is separated from the locking ball 16, the locking cam 12 continues to move downwards, the locking ball 16 is positioned between the upper inclined plane 101 and the middle inclined plane 102 until the upper inclined plane 101 is contacted with the locking ball 16 to push the locking ball 16 to continue to move outwards in the limiting hole 15 until the piston disc 6 moves to the lowest end of the inner cavity 3, and at the moment, the locking ball 16 is positioned in the locking grooves formed by the upper inclined plane 101, the middle inclined plane 102 and the locking seat 18 on the locking cam 12, and the locking connection between the upper connecting disc 1 and the lower connecting disc 2 is realized.
When the locking device is disconnected, the air inlet 5 is loosened to ventilate, the locking air inlet 4 exhausts, the air pressure pushes the piston disc 6 to move upwards in the inner cavity 3, the piston rod 11 and the locking cam 12 are driven to move upwards, the upper inclined plane 101 on the locking cam 12 is separated from the locking ball 16 until the lower inclined plane 103 on the locking cam 12 is positioned above the locking ball 16, at the moment, the upper connecting disc 1 is separated from the lower connecting disc 2, and the inclined plane on the locking seat 18 on the lower connecting disc 2 presses the locking ball 16 to move inwards in the limiting hole 15 until the locking ring 14 is completely separated from the inner ring of the locking seat 18.
When the air is accidentally cut off, the air inlet 4 is locked and the air inlet 5 is released to be communicated with the outside, the piston disc 6 is restored to the middle position of the inner cavity 3 under the driving of the reset spring, the locking ball 16 is located in the locking groove formed by the upper inclined plane 101, the middle inclined plane 102 and the inclined plane of the locking seat 18 on the locking cam 12, the upper connecting disc 1 and the lower connecting disc 2 are still in a locking state, and therefore the upper connecting disc 1 and the lower connecting disc 2 can be effectively prevented from falling off.
The machining process of the locking stressed part comprises the following steps:
s1, material pretreatment and cleaning: cleaning the blank in an ultrasonic cleaning machine to remove surface attachments; deoiling: putting the cleaned blank into a pool of a deoiling cleaning agent for deoiling treatment, and finally washing the blank with clear water;
s2, rough machining, namely roughly machining each stress part by using a rough machining lathe, wherein the single edge of each machined surface is left with a margin of 1 mm;
s3, quenching and tempering intermediate treatment and quenching: conveying the rough machined parts of all the stressed parts into a quenching furnace, heating to 750 +/-10 ℃, and performing integral water quenching after the workpieces are taken out of the quenching furnace, wherein the water temperature is 27-33 ℃; tempering: feeding the quenched rough machined part into a tempering furnace, heating to 600 +/-10 ℃, taking out of the tempering furnace, and then air cooling;
s4, semi-finishing, namely semi-finishing each stressed part by using a semi-finishing lathe, wherein the allowance of each machined surface is 0.4 mm;
s5, quenching treatment, namely quenching: quenching the semi-finished parts of each stressed part in a quenching medium at the temperature of 1000-1200 ℃, wherein the optimal temperature is 1060 ℃; tempering: tempering the cooled semi-finished parts of the stressed parts in a quenching medium for 2.5-2.8 hours at the temperature of 300-500 ℃, optimally 585 ℃, and then taking out for air cooling;
s6, performing cryogenic treatment, namely performing cryogenic treatment on the semi-finished parts of the stress components in liquid nitrogen at the temperature of-170 to-180 ℃ for 4.5 hours; after the deep cooling treatment, naturally placing the semi-finished parts of all the stress components to return to the room temperature;
s7, finishing, namely finishing each stressed part by using a finishing lathe;
s8, passivation treatment and cleaning: cleaning the precision machined parts of all the stress parts in an ultrasonic cleaning machine to remove impurities; deoiling: putting the cleaned precision machined parts of each stressed part into a water tank of a deoiling cleaning agent for deoiling treatment, and finally washing the precision machined parts by using clear water; passivation: soaking the cleaned and deoiled finish-machined parts of each stress part in a passivator formed by fully mixing Na2Cr2O7 & 2H2O (20-30 g/L) and 65% HNO3 (300-500 g/L) for 0.5 hour; and (3) sealing: and (3) putting the finished parts of the stress parts after passivation treatment into a drying furnace formed by mixing 20-40% of Al, 50-70% of FeAl, 5-8% of rare earth oxide and 0.4-2% of NH4Cl for 1.5 hours.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A locking stress part of a tool quick-change device comprises a piston disc (6), a piston rod (11), a locking cam (12), a flange plate (13), a locking ring (14), a locking ball (16) and a locking seat (18), and is characterized in that the locking stress part is arranged on an upper connecting disc (1) connected with a mechanical arm, the piston disc (6) is movably connected in an inner cavity (3) formed in the upper connecting disc (1), the side walls of the upper end and the lower end of the inner cavity (3) are communicated with a locking air inlet (4) and a loosening air inlet (5), a return spring is fixed between the piston disc (6) and the inner cavity (3), the piston rod (11) is fixed on the piston disc (6), the locking cam (12) is fixed at one end of the piston rod (11) far away from the piston disc (6), the flange plate (13) is fixed on the upper connecting disc (1) at the opening of the inner cavity (3), the locking device is characterized in that a locking ring (14) is fixed on the flange plate (13), a plurality of locking balls (16) which are uniformly arranged in an annular array are movably connected onto the locking ring (14), a lower connecting plate (2) which is matched with the upper connecting plate (1) and is connected with an end effector is arranged below the upper connecting plate (1), a locking hole (17) is formed in the axis of the lower connecting plate (2), and a locking seat (18) is fixed at the locking hole (17) to form a structure that when the piston plate (6) pushes the piston rod (11) to move, the locking cam (12) presses the locking balls (16) to be clamped on the locking seat (18), so that the upper connecting plate (1) and the lower connecting plate (2) are locked;
the locking stress components are made of martensitic stainless steel materials, the Rockwell hardness of the locking stress components is HRC56-HRC60, and the salt spray resistance is salt spray 95H-salt spray 100H;
the preparation method of the locking stressed component comprises the following steps:
s1 material pretreatment and cleaning: cleaning the blank in an ultrasonic cleaning machine to remove surface attachments; deoiling: putting the cleaned blank into a pool of a deoiling cleaning agent for deoiling treatment, and finally washing the blank with clear water;
s2, rough machining, namely, roughly machining each stress part by using a rough machining lathe, wherein the single edge of each machined surface is left with a margin of 1 mm;
s3, hardening and tempering intermediate treatment and quenching: conveying the rough machined parts of all stressed parts into a quenching furnace, heating to 1000-1100 ℃, taking the workpieces out of the quenching furnace, and performing integral water quenching, wherein the water temperature is 27-33 ℃; tempering: feeding the quenched rough workpiece into a tempering furnace, heating to 480-520 ℃, taking out of the tempering furnace, and then air-cooling;
s4, semi-finishing, namely semi-finishing each stressed part by using a semi-finishing lathe, wherein the single edge of each machined surface is left with a margin of 0.4 mm; s5 quenching treatment, namely quenching: quenching the semi-finished parts of each stressed part in a quenching medium at the temperature of 1000-1200 ℃; tempering: tempering the cooled semi-finished parts of the stressed parts in a quenching medium at the temperature of 560-600 ℃ for 2.5-2.8 hours, and then taking out for air cooling;
s6, carrying out cryogenic treatment, namely carrying out cryogenic treatment on the semi-finished parts of the stress components in liquid nitrogen at the temperature of-170 to-180 ℃ for 4.5 hours; after the deep cooling treatment, naturally placing the semi-finished parts of all the stress components to return to the room temperature;
s7, finishing, namely finishing each stressed part by using a finishing lathe;
s8 passivation treatment and cleaning: cleaning the precision machined parts of all the stress parts in an ultrasonic cleaning machine to remove impurities; deoiling: putting the cleaned precision machined parts of each stressed part into a water tank of a deoiling cleaning agent for deoiling treatment, and finally washing the precision machined parts by using clear water; passivation: soaking the cleaned and deoiled finish-machined parts of each stress part in a passivator formed by fully mixing Na2Cr2O7 & 2H2O (20-30 g/L) and 65% HNO3 (300-500 g/L) for 0.5 hour; and (3) sealing: and (3) putting the finished parts of the stress parts after passivation treatment into a drying furnace formed by mixing 20-40% of Al, 50-70% of FeAl, 5-8% of rare earth oxide and 0.4-2% of NH4Cl for 1.5 hours.
2. The locking stress part of the quick tool change device according to claim 1, wherein the locking ring (14) is provided with a plurality of limiting holes (15) which are uniformly arranged in an annular array, the locking balls (16) are movably connected in the limiting holes (15), and the diameter of one end of each limiting hole (15) close to the outside is smaller than that of each locking ball (16).
3. The locking stress part of the quick tool change device according to claim 1, wherein the locking cam (12) is composed of an upper inclined surface (101), a middle inclined surface (102) and a lower inclined surface (103), the included angle between the upper inclined surface (101) and the middle inclined surface (102) is greater than 90 °, the included angle between the middle inclined surface (102) and the lower inclined surface (103) is less than 90 °, the included angle between the upper inclined surface (101) and the piston rod (11) is less than the included angle between the lower inclined surface (103) and the piston rod (11), and an arc-shaped transition surface is arranged between the middle inclined surface (102) and the lower inclined surface (103).
4. The tool quick-change device locking stress element according to claim 1, characterized in that a first sealing ring (8) is fixed on the side end surface of the piston disc (6), and a second sealing ring (10) is fixed on the opening of the piston rod (11) penetrating through the inner cavity (3).
5. The quick-change tool holder locking stress element according to claim 1, wherein the piston disc (6) divides the inner cavity (3) into an upper chamber and a lower chamber, and the locking air inlet (4) and the releasing air inlet (5) are respectively communicated with one chamber.
6. The quick tool change device locking force-receiving member of claim 1, wherein the locking force-receiving member has a rockwell hardness of HRC 58.
7. The quick tool change device locking stress member according to claim 1, wherein the salt spray resistance of the locking stress member is salt spray 96H.
8. The quick tool change device locking stressed member of claim 1, wherein in the quenching treatment process of S5, the quenching temperature is 1060 ℃ and the tempering temperature is 585 ℃.
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| CN202110748949.XA CN113370250A (en) | 2021-07-02 | 2021-07-02 | Locking stress part of tool quick-change device and processing technology thereof |
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| CN202110748949.XA CN113370250A (en) | 2021-07-02 | 2021-07-02 | Locking stress part of tool quick-change device and processing technology thereof |
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Application publication date: 20210910 |