CN109267243B - Brake pad needling machine and brake pad production method - Google Patents
Brake pad needling machine and brake pad production method Download PDFInfo
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- CN109267243B CN109267243B CN201811507512.1A CN201811507512A CN109267243B CN 109267243 B CN109267243 B CN 109267243B CN 201811507512 A CN201811507512 A CN 201811507512A CN 109267243 B CN109267243 B CN 109267243B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H18/00—Needling machines
- D04H18/02—Needling machines with needles
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4242—Carbon fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
Abstract
The invention provides a brake pad needling machine and a brake pad production method, wherein the needling machine comprises a needling head workbench and a material workbench, the needling head workbench comprises a needling head rack, a tool magazine fixing box, an X-direction guide rail, a Y-direction guide rail, a needling head fixing box, a needling driving device, a station selecting device, a needling plate fixer and a needling plate, and the material workbench comprises a material rack, a raw material box conveying mechanism, a raw material box bottom plate position control mechanism, a needling bottom plate position control mechanism, a finished product box bottom plate position control mechanism and a finished product box conveying mechanism. According to the needling machine, the 3D forming structure and the automatic tool changing structure of the machining center are integrated, three-dimensional needling of the carbon fiber brake pad with a specific size is realized, the tool changing structure with a plurality of needling forming plates is actually designed according to needling forming, interlayer layering and needle breakage are avoided, a servo motor is adopted, the degree of automation is improved, and the movement noise is reduced.
Description
Technical Field
The invention relates to the technical field of non-woven needling molding of short fiber, in particular to a brake pad needling machine and a brake pad production method, which are mainly used for needling molding of a short fiber carbon fiber brake pad.
Background
The equipment and the needling process for needling and forming the domestic brake pad made of the short-staple carbon fiber material are as follows:
firstly, a flat needling machine for domestic production of carbon fiber brake pads is provided:
the main movement of the flat needling machine is that the needling head moves up and down, the downward movement is needling, namely that the needling needles penetrate through the carbon fiber layer on the net curtain, and the upward movement is that the needling needles withdraw from the carbon fiber layer on the net curtain. The needling head is arranged on a connecting rod mechanism driven by a crank main shaft, and the crank main shaft rotates to drive the needling head to move up and down. The two ends of the crank main shaft are fixedly supported and driven by the variable frequency motor.
The carbon fiber layer is paved in the net curtain, and the net curtain is a bottomless square frame like a bottomless drawer; the frame of the net curtain is connected with the screw-nut pair, and the net curtain is placed on the roller. A bottom plate is arranged below the net curtain, and corresponding pinholes are drilled on the bottom plate, so that the needling depth can reach 12-15mm, and the net curtain moves forwards and backwards. The net curtain is driven by a screw-nut pair. The screw-nut pair is driven by a ratchet pawl which is connected with a crank main shaft by a sprocket chain. The crank main shaft rotates, the ratchet wheel and the pawl are driven to move through chain transmission, and the ratchet wheel and the pawl drive the screw nut pair to drive the net curtain to move forwards or backwards. The bottom plate below the net curtain is arranged on the manual lifting platform. The distance between the bottom plate and the needling plate can be adjusted by manually installing the needle punching plate on the manual lifting table. The penetration depth of the lancet is changed. The bottom plate is placed on the roller. The net curtain can move freely. The roller is installed on the manual elevating platform.
(II) needling process:
when needling is started, the net curtain is required to be installed, and a carbon fiber layer is arranged on the bottom plate below the net curtain. The height of the manual elevator is then adjusted. After the height is proper, the variable frequency motor is started to start needling. During needling, the mesh curtain moves forward. And stopping the movement after the movement reaches the front positioning point. At this time, the needling operation is stopped, and the variable frequency motor is also stopped. At the moment, the height of the manual lifting table is reduced, and a carbon fiber layer is newly paved in the net curtain. The height of the manual elevator is then adjusted. After the height is proper, the direction of the ratchet wheel and the pawl is changed, so that the movement direction of the net curtain is changed into backward movement; then the variable frequency motor is started to start needling. During needling, the mesh curtain moves rearward. And stopping the movement after the movement reaches the post-compensation position. The operation is circulated until a brake pad is produced. Currently, in a carbon fiber brake pad manufacturing enterprise, 1 brake pad of 700 x 50 is manufactured every 12 hours on average.
(III) the main problems of producing the carbon fiber brake pad by using a flat needling machine are that:
the brake block has layered quality defects:
(1) Because of the combined use of the crank-connecting rod mechanism and the ratchet pawl mechanism, the ratchet pawl rotates one lattice every time the needle is punched, and the pawl rotates one lattice to drive the screw nut to move a distance of the needle plate. This results in the needle being in the same position at each needling. The needling holes of each layer of carbon fiber material are basically overlapped when in needling, so that short fiber is seldom formed between layers to be hooked up and down, the bonding force between the layers is weak, and the carbon fiber brake pad is easy to laminate.
(2) Inefficiency, on average, produced 1 block of 700 x 50 brake pads every 12 hours;
(3) The noise is large, and the vibration in the workshop is large and the noise is large and the average noise is larger than 92Db because of using a crank-four-bar mechanism and a chain transmission and ratchet pawl mechanism.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at solving the problems that the brake block of the prior flat needling machine for needling and forming the carbon fiber brake block has layered quality defect, the bottom plate is excessively long in time and the like, the invention provides a brake block needling machine.
The technical scheme adopted for solving the technical problems is as follows: a brake pad needling machine comprises a needling head workbench and a material workbench, wherein,
the needling head workbench comprises a needling head rack, a tool magazine fixing box, an X-direction guide rail, a Y-direction guide rail, a needling head fixing box, a needling driving device, a station selecting device, a needling plate fixer and a needling plate, wherein the needling head rack adopts a truss structure, the tool magazine is arranged on the tool magazine fixing box, and the tool magazine fixing box is arranged on the needling head rack; the X-direction guide rail is arranged on the needling head frame, the Y-direction guide rail is arranged on the X-direction guide rail, the needling head fixing box is arranged on the Y-direction guide rail, and the X-direction guide rail and the Y-direction guide rail form a two-dimensional moving mechanism to drive the needling head fixing box to move in an X-Y plane; the station selecting device is fixed in the needling head fixing box, the needling driving device is arranged on the station selecting device, and the needling plate is fixed on the needling plate fixer; the needling plate fixer is arranged on the needling driving device;
The material workstation includes the material frame, sets up the raw materials case conveying mechanism at material frame material loading station, sets up the raw materials case of material frame raw materials storage station and the raw materials case bottom plate position control mechanism that is located the raw materials case below, sets up the automatic conveying mechanism of material between material frame raw materials storage station and finished product storage station, sets up the acupuncture bottom plate at material frame acupuncture station and the acupuncture bottom plate position control mechanism that is located the acupuncture bottom plate below, the acupuncture station sets up on the part or the whole of the automatic conveying mechanism of material, sets up the finished product case at material frame finished product storage station and the finished product case bottom plate position control mechanism that is located the finished product case below to and sets up the finished product case transport mechanism at material frame ejection of compact station, material loading station, raw materials storage station, frame acupuncture station, finished product storage station and ejection of compact station set gradually.
Specifically, the tool magazine fixing box comprises a driving servo motor, a speed reducer and a tool magazine rotating joint.
The material workbench comprises 5 stations, such as a feeding station, a raw material storage station, a needling station, a finished product storage station, a discharging station and the like, and the core is 3 stations, such as a raw material storage station, a needling station, a finished product storage station and the like. The raw material storage station is used for placing a raw material box, the raw material box is used for storing materials to be needled, the needling station is a station for realizing needling, the finished product storage station is used for placing a finished product box, and the finished product box is used for storing needled formed materials.
The needled material is needled at a needling station, one layer is needled at each needling station, and the thickness of one layer of material is reduced at the needling station. At this time, the bottom plate of the raw material box of the raw material storage station is lifted upwards by the thickness of a layer of material, and the material is protruded. The layer of material is sent to a needling station by an automatic feeding mechanism for needling.
After the material of the needling station reaches the set thickness (layer) and the last layer is needled, the needled finished product of the brake pad of the needling station is sent into a finished product box of the finished product storage station by an automatic feeding mechanism.
Further, the small-sized needling plate is adopted, and the small-sized needling plate is a square needling plate with the needle plate side length being 1/N of the product side length, wherein N is more than or equal to 2 and N is N+.
Preferably, the value range of n is: n is more than or equal to 3 and less than or equal to 10, and N is N+.
For manufacturing the brake block blank of 700 x 700, a common flat needling machine is adopted, and a needle plate of 850 x 45 (needling area is 38250mm 2) is most commonly used; the common needle plate used by the machine is 100 x 100 (the needling area is 10000mm 2); the largest needle plate was 115 x 115 (area 13225mm 2). The needle plate used by the machine is 1/3-1/4 of that of a common flat needling machine.
Further, in order to reduce noise and improve control accuracy, the magazine, the X-direction guide rail, the Y-direction guide rail, the needling driving device and the station selecting device of the needling head workbench are driven by servo motors, and the raw material box conveying mechanism, the automatic material conveying mechanism, the raw material box bottom plate position control mechanism, the needling bottom plate position control mechanism, the finished product box bottom plate position control mechanism and the finished product box conveying mechanism of the material workbench are driven by servo motors.
The servo motor consists of a motor, an encoder and a driver, and the driver is arranged in the electrical cabinet; the encoder is coaxially arranged with the motor and is arranged at the rear part of the motor, namely the rear part of the general three-phase motor is a fan; the rear part of the servo motor is an encoder.
Control noise: the servo motor can be provided with a climbing curve, so that the starting and stopping are stable (similar to a high-speed rail, the motion impact cannot be felt when the high-speed rail starts to stop); the climbing curve enables the machine to move without moving impact.
Control precision is improved: the servo motor is controlled to rotate by pulses, and each rotation has at least N8192 pulses; assuming n=1, each pulse controls 360/8192= 0.04396 ° = 2.637' (min). The control precision of the motor is different from that of the variable frequency motor and the stepping motor.
The production method of the brake pad comprises the brake pad needling machine and further comprises the following steps:
s1: the preparation work is that firstly, the process requirements for needling are input into a human-computer interface of a needling machine; checking whether a needling plate in the tool magazine is matched with a needling process, whether equipment is lubricated, whether the specification and the size of a material box are correct, whether materials to be processed are correct, and whether the placement of the materials in the material box is proper; checking whether the work is correct or not, and starting the machine after confirming the correct work;
S2: the material box is taken and placed, the material box filled with materials is placed on a material box conveying mechanism, the material box conveying mechanism is started, and the material box conveying mechanism conveys the material box to a material storage station; when the raw material box is free of materials, the raw material box conveying mechanism automatically reverses and brings the raw material box to a feeding station, and at the moment, after the empty raw material box is taken down at the feeding station, the raw material box filled with the materials is placed on the raw material box conveying mechanism;
s3: the material conveying, the material automatic conveying mechanism conveys the material in the material box of the material storage station to the needling station, the needled material is needled on a needling bottom plate of the needling station, one layer is needled, and the needling bottom plate position control mechanism controls the needling bottom plate to descend by the thickness of one layer of material; at the moment, the bottom plate of the raw material box of the raw material storage station is controlled by the position control mechanism of the bottom plate of the raw material box, the thickness of one layer of material is lifted upwards, and the material is protruded; the automatic material conveying mechanism sends the layer of material to a needling station for needling;
s4: after the material is conveyed to the needling station, the needling plate is positioned, and the X-direction guide rail and the Y-direction guide rail drive the needling head fixing box to move in an X-Y plane to determine the position of the needling plate; secondly, determining whether the station is a needling station or a tool changing station, and if the station is the tool changing station, changing the needling plate; if the needling station is adopted, the needling plate needs to be driven to perform needling.
S4.1: needling process
If the needling station is located, the station selecting device arranged in the needling head fixing box moves downwards to drive the needling driving device, the needling plate fixer and the needling plate to move downwards in place, and then the needling driving device drives the needling plate to move up and down; the downward movement of the needling plate is needling action, and the upward movement is the withdrawal of the needled raw material;
after the needling plate completely withdraws from the material, the X-direction guide rail drives the needling head fixing box to move for a distance of the needling plate in the X direction, and then needling is continued; after the material in the X direction is completely needled, the Y-direction guide rail drives the needling head fixing box to move in the X-Y plane by one needling plate position, and then needling is restarted; the X-direction guide rail drives the needling head fixing box to move a distance of a needling plate in the-X direction until the material in the-X direction is completely needled, and the Y-direction guide rail drives the needling head fixing box to move a position of the needling plate in the X-Y plane and then needling is restarted; if so, needling of the material in the X-Y plane is completed repeatedly; after that, the needling plate needs to be replaced, and the tool changing station is entered, so that the needling plate needs to be replaced;
s4.2: tool changing
The station selecting device arranged in the needling head fixing box moves upwards to drive the needling driving device, the needling plate fixer and the needling plate to move upwards to a proper position, and then the X-direction guide rail and the Y-direction guide rail drive the needling head fixing box to move in an X-Y plane to convey the needling plate to a cutter changing position; meanwhile, a power device in a tool magazine fixing box drives the tool magazine to confirm that "whether the tool position aligned with the tool changing position is the empty tool position? If the tool magazine is not the blank tool position, rotating the tool magazine to rotate the blank tool position to the tool changing position; at the moment, the needling plate fixer is loosened, and the needling plate falls into the empty knife position; after that, a power device in the tool magazine fixing box drives the tool magazine to rotate, and the needling plate which is required to be needled below is rotated to a tool changing position;
The station selecting device arranged in the needling head fixing box moves downwards to drive the needling driving device and the needling plate fixer to move downwards to a proper position, a new needling plate is inserted into the needling driving device, and then the needling plate fixer is locked; the station selecting device in the needling head fixing box drives the needling driving device, the needling plate fixer and the new needling plate to retract to the cutter changing position to complete cutter changing;
s4.3: after the tool is changed, needling is carried out on the material in an X-Y plane, and after needling is finished, a needling plate is changed to continue needling until all needling of the layer of material is finished; after needling of a layer of material is completed, restarting the process of conveying the raw materials until needling of a product is completed.
S5: after finished product conveying, a brake pad is used for needling a finished product, the finished product is required to be conveyed into a finished product box of a finished product storage station, and at the moment, a needling bottom plate position control mechanism drives a needling bottom plate to move upwards by a distance of one product thickness so as to protrude the product; simultaneously, the bottom plate position control mechanism of the finished product box moves upwards to enable the bottom plate position of the finished product or empty box in the product box to be flush with the position of the needling bottom plate; starting an automatic material conveying mechanism, pushing animals to the bottom plate position of a finished product box of a finished product storage station; at the moment, the bottom plate position control mechanism of the finished product box moves downwards, so that the upper surface position of the bottom plate of the finished product box or the empty box in the product box is level with the position of the needling bottom plate; preparing for placing the next brake pad needling finished product; then the automatic material conveying mechanism reverses and returns to the position before starting;
S6: taking and placing a finished product box, and when the finished product box of the raw material box is filled with the needled product, automatically operating a finished product box conveying mechanism and conveying the finished product box to a blanking station; at the moment, a worker takes off a finished product box filled with needled products at a blanking station; and then, placing the empty finished product box on a finished product box conveying mechanism, starting the finished product box conveying mechanism, and conveying the empty finished product box to a finished product storage station by the finished product box conveying mechanism.
The beneficial effects of the invention are as follows: the invention provides a brake pad needling machine, which is special equipment for needling and forming a carbon fiber brake pad. The three-dimensional needling machine integrates a 3D forming structure and an automatic tool changing structure of a machining center, realizes three-dimensional needling of a carbon fiber brake block with a specific size, and actually designs a tool changing (plate) structure with a plurality of needling forming plates according to needling forming, and has the following specific beneficial effects:
(1) The host adopts a three-D structure
The main machine of the carbon fiber brake pad needling forming machine adopts a three-D structure: needling head workbench and material workbench. The needling head workbench is arranged on the main frame, and a plane guide rail is arranged in the needling head workbench and can do XY axis plane movement. The needling head is arranged on a guide rail moving in an XY axis plane and can do XYZ three-degree-of-freedom movement.
(2) Tool changing structure of combined machining center
To increase the bonding force between the layers of material, more needling holes are needed for each layer. Such dense lancets are not installed in one needling plate, requiring multiple needling plates.
The carbon fiber brake block needling forming machine is designed with a cutter (plate) changing structure with 6 needling plates, and at most 6 needling plates can be installed at one time. The 6 needling plates can be automatically replaced. Lifting the needling head, which is an automatic tool changing station; the needling head is put down, and then the needling station is adopted.
(3) Light structure of small needling plate
Because the maximum size of the formed brake pad is phi 650 x 50, the plane size of phi 650 is needled by using 700 x 700 materials. Thus, a planar needling of 700 x 700 size can be achieved using a small needling plate. The small needling plate is formed, so that the needling head is light in overall weight, small in inertia and convenient to control. Meanwhile, the whole machine is light in weight and low in energy consumption.
(4) Servo motor driving, no motion noise
All motors are servo motors. Starting and stopping curves can be set when the servo motor is started and stopped, so that the driving device moves stably, inertial impact is avoided, and motion noise is avoided.
(5) High efficiency automation
The control of the servo motor is controlled by an encoder and can be realized by pulse numbers, so that all positioning can be very accurate. No additional travel switch, proximity switch, is required. The system is reliable and efficient. The operation of the device is controlled by a program. The degree of automation is higher.
(6) Flexible needling
The users of the brake pads are different, and the needling requirements of the brake pads are different. The needling requirements for each batch of brake pads are quite different. These requirements can be achieved by adjusting the distance between pinholes. The distance between pinholes can be adjusted in a program by changing the process requirements in the program, such as the size and the number of the needling plates and the dislocation distance of needling among material layers. The carbon fiber brake pad needling molding machine can meet the production requirements of brake pads of users such as Boeing aircrafts, air passenger planes, C919, high-speed rails, motor cars, urban irons and the like.
(7) No layering phenomenon
And 1-6 times of needling are carried out among each layer of material, and in addition, needling is carried out in a staggered manner among layers, so that needled holes are basically not overlapped. Each needling hole is formed at a position without needling, and short filaments in the material are basically pulled to the interlayer, so that the interlayer binding force is enhanced, and the interlayer has no layering phenomenon.
(8) No broken needle phenomenon
The needling plate of the flat needling machine on the market is of a long rectangular structure. The long rectangular structure, such as the commonly used needling plate of 800 x 30, easily causes the material to tilt when needling the front edge part or the rear edge part of the material, and the broken needle phenomenon easily occurs at the moment and the net curtain is easily damaged. Damaging the net curtain, and then reinstalling; broken needles occur, the broken needles are left inside the material, the structure inside the material is changed, the impurities inside the material are increased, and the physical and chemical properties of the material are reduced.
Unlike the long rectangular structure of the needling plate of the flat needling machine, the needling plate of the carbon fiber brake pad needling forming machine is of a square structure. For example, a needling plate with the size of 100 x 100 is commonly used, and when needling to the edge part of a material, the stressed area is large, and no side tilting phenomenon exists. Thus, there is no chance of needle breakage.
The needle breakage phenomenon is avoided, the impurity content and proportion in the material cannot be changed, the physical and chemical properties of the material are guaranteed, and the quality of the brake pad is improved.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic structural view of a preferred embodiment of the present invention.
Fig. 2 is a schematic top view of a preferred embodiment of the present invention.
FIG. 3 is a schematic view of the position and size of a needling plate and material of the prior art.
FIG. 4 is a schematic view of the location and dimensions of a small needling plate and material of the present invention.
In the figure: 1. the needling head machine comprises a needling head rack, 2 parts of a tool magazine, 3 parts of a tool magazine fixing box, 4 parts of an X-direction guide rail, 5 parts of a Y-direction guide rail, 6 parts of a needling head fixing box, 7 parts of a needling driving device, 8 parts of a station selecting device, 9 parts of a needling plate fixing device, 10 parts of a needling plate, 11 parts of a finished product box conveying mechanism, 12 parts of a material automatic conveying mechanism, 13 parts of a finished product box, 14 parts of a finished product box bottom plate position control mechanism, 15 parts of a needling bottom plate, 16 parts of a needling bottom plate position control mechanism, 17 parts of a raw material box, 18 parts of a raw material box bottom plate position control mechanism, 19 parts of a raw material box conveying mechanism, 20 parts of a material rack, 21 parts of a material.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the invention only by way of illustration, and therefore it shows only the constitution related to the invention.
As shown in fig. 1 and 2, the carbon fiber brake pad needling machine of the invention is composed of an electrical control system and a mechanical system. The mechanical system is mainly described herein. The mechanical system comprises a needling head workbench and a material workbench, wherein,
The needling head workbench comprises a needling head rack 1, a tool magazine 2, a tool magazine fixing box 3, an X-direction guide rail 4, a Y-direction guide rail 5, a needling head fixing box 6, a needling driving device 7, a station selecting device 8, a needling plate fixer 9 and a needling plate 10, wherein the needling head rack 1 adopts a truss structure, the tool magazine 2 is arranged on the tool magazine fixing box 3, and the tool magazine fixing box 3 is arranged on the needling head rack 1; the X-direction guide rail 4 is arranged on the needling head frame 1, the Y-direction guide rail 5 is arranged on the X-direction guide rail 4, the needling head fixing box 6 is arranged on the Y-direction guide rail 5, and the X-direction guide rail 4 and the Y-direction guide rail 5 form a two-dimensional moving mechanism to drive the needling head fixing box 6 to move in an X-Y plane; the station selecting device 8 is fixed in the needling head fixing box 6, the needling driving device 7 is arranged on the station selecting device 8, and the needling plate 10 is fixed on the needling plate fixer 9; the needling plate holder 9 is mounted on the needling drive 7.
The material workbench comprises a material rack 20, a material box conveying mechanism 19 arranged at a material loading station of the material rack 20, a material box 17 arranged at a material storage station of the material rack 20, a material box bottom plate position control mechanism 18 positioned below the material box 17, an automatic material conveying mechanism 12 arranged between the material storage station of the material rack 20 and a finished product storage station, a needling bottom plate 15 arranged at a needling station of the material rack 20, and a needling bottom plate position control mechanism 16 positioned below the needling bottom plate 15, wherein the needling station is arranged on part or all of the automatic material conveying mechanism 12, a finished product box 13 arranged at a finished product storage station of the material rack 20, a finished product box bottom plate position control mechanism 14 positioned below the finished product box 13, and a finished product box conveying mechanism 11 arranged at a material discharging station of the material rack 20, wherein the material loading station, the material storage station, the rack needling station, the finished product storage station and the discharging station are sequentially arranged.
Specifically, the tool magazine fixing box 3 comprises a driving servo motor, a speed reducer and a tool magazine rotating joint.
The material workbench comprises 5 stations, such as a feeding station, a raw material storage station, a needling station, a finished product storage station, a discharging station and the like, and the core is 3 stations, such as a raw material storage station, a needling station, a finished product storage station and the like. The raw material storage station is used for placing the raw material box 17, the raw material box 17 is used for storing the materials 21 to be needled, the needling station is a station for realizing needling, the finished product storage station is used for placing the finished product box 13, and the finished product box 13 is used for storing the needled materials 21.
The needled material 21 is needled at a needling station, each needling a layer, the needling station lowering the thickness of the layer of material 21. At this time, the bottom plate of the raw material box 17 of the raw material storage station lifts up by the thickness of one layer of material 21, and protrudes the material 21. The layer of material 21 is fed to the needling station by an automatic feeding mechanism for needling.
After the material 21 of the needling station reaches a set thickness (layer) and the last layer is needled, the needled finished product of the brake pad of the needling station is sent into a finished product box 13 of the finished product storage station by an automatic feeding mechanism.
Further, the needling board 10 is a small needling board, which refers to a square needling board with a needle board side length of 1/N of the product side length, wherein N is greater than or equal to 2 and N is n+.
Preferably, the value range of n is: n is more than or equal to 3 and less than or equal to 10, and N is N+.
Further, in order to reduce noise and improve control accuracy, the magazine 2, the X-direction guide rail 4, the Y-direction guide rail 5, the needling driving device 7, and the station selecting device 8 of the needling head table, and the raw material box conveying mechanism 19, the automatic material conveying mechanism 12, the raw material box bottom plate position control mechanism 18, the needling bottom plate position control mechanism 16, the finished product box bottom plate position control mechanism 14, and the finished product box conveying mechanism 11 of the material table are all driven by servo motors.
The servo motor consists of a motor, an encoder and a driver, and the driver is arranged in the electrical cabinet; the encoder is coaxially arranged with the motor and is arranged at the rear part of the motor, namely the rear part of the general three-phase motor is a fan; the rear part of the servo motor is an encoder.
Control noise: the servo motor can be provided with a climbing curve, so that the starting and stopping are stable (similar to a high-speed rail, the motion impact cannot be felt when the high-speed rail starts to stop); the climbing curve enables the machine to move without moving impact.
Control precision is improved: the servo motor is controlled to rotate by pulses, and each rotation has at least N8192 pulses; assuming n=1, each pulse controls 360/8192= 0.04396 ° = 2.637' (min). The control precision of the motor is different from that of the variable frequency motor and the stepping motor.
The production method of the brake pad is characterized in that the production method of the brake pad is a working process of the system, and the working process of the system comprises 6 working procedures of preparation before working, taking and placing of a raw material box 17, raw material conveying, needling, finished product conveying, taking and placing of a discharging box and the like. The following is described in order:
s1: preparation before work
Firstly, inputting technological requirements for needling on a human-computer interface, including the size of a needling plate 10, the size of a material 21, needling moment, needling density (the number of times of needling per layer, the number of needling plates 10) and the like; it is checked whether the needling plate 10 in the magazine 2 is matched with the needling process, whether the equipment is lubricated, whether the specification and the size of the material box (the material box 17, the finished product box 13) are correct, whether the material 21 to be processed is correct, whether the material 21 in the material box 17 is properly placed, and the like.
Checking whether the work is correct, and starting the machine after confirming the correct work.
S2: raw material box 17 is taken and put
The function of the bin conveyor mechanism 19 is to convey the bin 17 filled with material 21 to a bin station; or an empty raw tank 17 is sent out.
The raw material box 17 is taken and placed, namely the raw material box 17 filled with materials 21 is placed on a raw material box conveying mechanism 19 at a feeding station manually; or the empty tote 17 is removed from the tote conveyor 19.
When the material 21 is not in the material box 17, the material box conveying mechanism 19 automatically reverses to take the material box 17 out to a feeding station. At this time, after the worker removes the empty raw material tank 17 at the loading station, the raw material tank 17 filled with the material 21 is placed on the raw material tank conveying mechanism 19, the raw material tank conveying mechanism 19 is started, and the raw material tank conveying mechanism 19 conveys the raw material tank 17 to the raw material storage station.
S3: raw material transport
The raw material is fed to the needling station by the automatic feeding mechanism 12 from the raw material tank 17 of the raw material storage station.
The needled material 21 is needled on the needled base 15 of the needling station, one layer is needled, and the needled base position control mechanism 16 controls the needled base 15 to descend by the thickness of one layer of material 21. At this time, the bottom plate of the raw material box 17 of the raw material storage station is controlled by the raw material box bottom plate position control mechanism 18, and the thickness of one layer of material 21 is lifted upwards to protrude the material 21. The layer of material 21 is sent to the needling station for needling by the automatic material conveying mechanism 12.
S4: needling tool changing:
after the material 21 is delivered to the needling station, the needling plate 10 is first positioned. The X-direction guide rail 4 and the Y-direction guide rail 5 drive the needling head fixing box 6 to move in an X-Y plane to determine the position of the needling board 10.
Secondly, determining a station: is the needling station or the tool changing station confirmed by the electrical control system? If a tool changing station is used, the needling plate 10 needs to be changed; in the case of a needling station, it is necessary to drive the needling plate 10 for needling.
S4.1: the needling process is as follows:
if in the needling station, the station selecting device 8 arranged in the needling head fixing case 6 moves downwards to drive the needling driving device 7, the needling plate fixer 9 and the needling plate 10 to move downwards in place, and then the needling driving device 7 drives the needling plate 10 to move up and down. The downward movement of the needling plate 10 is the needling action and the upward movement is the withdrawal of the needled material.
After the needling plate 10 completely exits the material 21, the X-direction guide rail 4 drives the needling head fixing case 6 to move in the X-direction by the distance of one needling plate 10, and then needling is continued. After the material 21 in the X direction is completely needled, the Y-direction guide rail 5 drives the needling head fixing box 6 to move in the X-Y plane by one needling plate 10 position, and then needling is restarted. The X-direction guide rail 4 drives the needling head fixing case 6 to move a distance of the needling plate 10 in the-X direction until the material 21 in the-X direction is completely needled, and the Y-direction guide rail 5 drives the needling head fixing case 6 to move a position of the needling plate 10 in the X-Y plane and then needling is restarted.
The needling of the material 21 in the X-Y plane is completed, thus repeating. Thereafter, the needleboard 10 needs to be replaced and the tool changing station is entered, and the needleboard 10 needs to be replaced.
S4.2: the tool changing process is as follows:
the station selecting device 8 arranged in the needling head fixing case 6 moves upwards to drive the needling driving device 7, the needling plate fixer 9 and the needling plate 10 to move upwards to a proper position, and then the X-direction guide rail 4 and the Y-direction guide rail 5 drive the needling head fixing case 6 to move in an X-Y plane to convey the needling plate 10 to a cutter changing position. At the same time, the power unit in the magazine fixing case 3 drives the magazine 2 to confirm that "is the tool position aligned with the tool changing position is the empty tool position? If the tool magazine 2 is not the empty tool position, the tool magazine is rotated to rotate the empty tool position to the tool changing position.
At this point the needling plate holder 9 is released and the needling plate 10 falls into the empty knife compartment.
Thereafter, the power means in the magazine holding case 3 drives the magazine 2 to rotate, and the needling plate 10 to be needled below is rotated to the cutter changing position.
The station selecting device 8 arranged in the needling head fixing case 6 moves downwards to drive the needling driving device 7 and the needling plate fixer 9 to move downwards to a proper position, a new needling plate 10 is inserted into the needling driving device 7, and then the needling plate fixer 9 is locked. The station selector 8 in the needling head fixing case 6 drives the needling drive 7, needling plate holder 9, and new needling plate 10 to retract to the cutter-changing position. Thus completing the tool changing process.
S4.3: and (3) needling the material 21 in the X-Y plane after the tool is changed, and replacing the needling plate 10 after needling is completed, so that needling is continued until all needling of the layer of material 21 is completed.
After the needling of the layer of material 21 is completed, the process of transporting the material is restarted until the needling of a piece of product is completed.
S5: finished product conveying
After the finished product is needled by a brake pad, the finished product needs to be conveyed to a finished product box 13 of a finished product storage station.
At this time, the needling bottom board position control mechanism 16 drives the needling bottom board 15 to move upwards by a distance of one product thickness, so as to protrude the product; at the same time, the product tank floor position control mechanism 14 moves upward so that the position of the product (or the floor of the empty tank) in the product tank is flush with the position of the needling floor 15. The automatic material conveying mechanism 12 is started to push the material 21 to the bottom plate position of the finished product box 13 of the finished product storage station. At this time, the bottom plate position control mechanism 14 of the product box moves downwards, so that the upper surface position of the product (or the bottom plate of the empty box) in the product box is level with the position of the needling bottom plate 15; and is ready for placing the next brake pad needled finished product.
The automatic material handling mechanism 12 is then reversed and retracted to the pre-start position.
S6: taking and placing of finished product boxes 13
The function of the finished product box conveying out mechanism 11 is to convey the finished product box 13 filled with the materials 21 to a discharging station; or the empty product tank 13 is sent to.
The taking and placing of the finished product boxes 13 are that the empty finished product boxes 13 are manually placed on the finished product box conveying mechanism 11 at a blanking station; or the product bin 13 filled with needled product is removed from the product bin feed mechanism 11.
When the finished product box 13 of the raw material box is filled with the needled product, the finished product box conveying mechanism 11 automatically operates to convey the finished product box 13 to a blanking station. At this point the worker removes the finished box 13 filled with needled product at the blanking station. Then, the empty bin 13 is placed on the bin delivery mechanism 11, the bin delivery mechanism 11 is activated, and the bin delivery mechanism 11 delivers the empty bin 13 to the bin storage station.
As shown in fig. 3 and 4, a comparative example is given for four advantages of the small and medium size needling plate structure of the present invention.
1. Small needle plate structure, from manual needle punching.
2. The needling robot realizes needling by simulating manual needling action of a human hand.
3. Needling characteristics of a large needle plate of a common needling machine:
(1) The common needling machine adopts a large needle plate for needling: the needle plate has a size of 850 x 50 and a needling area of 42500mm2
(2) And (3) calculating needling force of a common needling machine:
the C/C composite brake pad is needled by a common flat needling machine. The rated output power of a variable frequency motor of a common flat needling machine is 15KW (50 HZ); adopting a belt to reduce the speed to drive a crank-link mechanism to realize needling; the stroke of the needling plate 10 is 100mm; the penetration depth was 12mm.
The needling power is 15KW, a variable frequency motor is used, the motor rotating speed is 1450rpm, a belt is used for decelerating, and finally the frequency converter is decelerated to the speed that the needling speed is the fastest once per second, namely the output rotating speed is 60rpm. The belt speed reducer has a transmission ratio not greater than 5 (i.ltoreq.5), and the actual output rotation speed of the motor is about 300rpm calculated by i.ltoreq.5, and the power of the motor is about 20% of the rated power, namely 7.5KW.
Because the crank-link mechanism is adopted to convert the rotary motion into the reciprocating linear motion, for the needling with the penetration depth of 12mm
850 x 50 needle board needle arrangement (at a pitch of 9mm, i.e. 9*9, the number of needles is 95 x 6 = 570). The needling force of the needle board is as follows:
status of needling force of needle board
As can be seen from the above table, the amount of needling force varies with the penetration depth during needling. The needling force is greatest immediately after penetration, and thereafter successively smaller.
The needling force becomes progressively smaller, which is disadvantageous for the needling process. As this affects the improvement of the density and uniformity of each layer of the C/C fiber product.
The optimum condition is that the needling forces at each point of penetration depth are substantially uniform, so that the density and uniformity of each layer of the C/C fiber product are most advantageously improved.
(3) The phenomenon of rolling (referred to in the industry as "edge lifting") during needling.
Taking the production of C/C brake pads with Φ650×50 as an example, the following is illustrated:
the C/C brake pad blank size Φ650×50 is approximately 650+50×2+10×2=770. I.e. the blank size is 770 x 770. Since the thickness of the raw material of the C/C composite layer (net tire and carbon cloth) is 1.48mm (wherein the thickness of the carbon cloth is 0.48mm and the thickness of the net tire is 1 mm), the thickness of the net tire is 50mm by needling, and about 65 layers are needed.
After needling 30 layers, when needling the edge of the brake pad, a roll (edge tilting) phenomenon is easy to occur, namely, when needling one edge, the edge is stressed, and the other edge opposite to the edge is not stressed and is tilted upwards. This phenomenon is called blank tilting (referred to in the industry as "edge lifting").
The phenomenon of blank tilting (edge lifting) creates two problems: firstly, the edge of the blank of the brake pad is not uniformly needled, and in addition, the puncture needle is subjected to bending stress due to the side tilting of the blank, so that the puncture needle is broken.
If the broken needle remains in the blank, the quality of the C/CC/C brake pad can be seriously affected. These side-tipping (edge-lifting) portions of the blank must be removed.
The phenomenon of side tilting (called as 'edge tilting' in the industry) in the needling process affects the production efficiency and also causes more raw materials to be consumed in the production process of the product.
4. Small needle plate needling characteristics of the carbon fiber needling machine:
(1) The needle plate is 1/n (generally 1/5-1/10) of the side length of the product, and high-force needling can be realized by small power.
(2) Taking the production of C/C brake pads with Φ650×50 as an example, the following is illustrated:
the C/C brake pad blank size of Φ650×50 is approximately 650+10×2=670. I.e. the blank has a size of
670*670. The thickness of the raw material C/C composite layer (net tyre and carbon cloth) is 1.48mm (wherein the thickness of the carbon cloth is that of the net tyre
0.48mm, 1mm web thickness), needle punched to a thickness of 50mm, approximately 65 layers were required.
The size of the needle plate is 1/n of the blank, if n=6 is taken, 670/6=112 (the size of the needle plate is 112×112); if n=7, 670/7=96.5 (needle board size 97×97); in view of productivity, a 112 x 112 needle plate was used.
The needles of the 112 x 112 needle board (pitch of 9*9 is 9 mm; the needle board number of 112 x 112 is 13 x 13=169).
The needling force is (driven by an electric cylinder, a servo motor drives a speed reducer, the speed reducer drives the electric cylinder, and the needling plate 10 is connected to the electric cylinder):
The 750W servo motor outputs rated torque of 2.39N.M, and the reduction ratio of the speed reducer is 2; the lead of the electric cylinder is 5mm, and the rated needling force is as follows: f=2×pi×t×i/t=2×3.14×2.39×2/0.005=6003n the average force per needle is 6003/169=35.5n.
For a penetration depth of 12mm, the needling force is constant and does not vary periodically.
(3) The needling process has no side tilting phenomenon. Thus, no broken needle phenomenon occurs.
5. Conclusion(s)
(1) A small needle plate is adopted for needling, and a small power (such as a 750W servo motor in the example) is used for realizing high-force needling (6000N); compared with a common needling machine, the electric power is saved per hour: 15KW-750W = 14.25KW.
(2) Raw materials are saved: the raw material is reduced from 750 to 750 (562500 mm 2) to 670 (448900 mm 2); the material saving was (562500-448900)/448900 =25% (even according to
562500-448900)/562500＝20％)。
(3) The needling process has no side-rolling phenomenon, no manual intervention is needed in the needling process, and automatic production can be realized.
(4) The material has no residual broken needle, and the product quality is improved.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. A production method of a brake pad is characterized in that: the brake pad needling machine comprises a needling head workbench and a material workbench, wherein,
the needling head workbench comprises a needling head rack (1), a tool magazine (2), a tool magazine fixing box (3), an X-direction guide rail (4), a Y-direction guide rail (5), a needling head fixing box (6), a needling driving device (7), a station selecting device (8), a needling plate fixer (9) and a needling plate (10), wherein the needling head rack (1) adopts a truss structure, the tool magazine (2) is arranged on the tool magazine fixing box (3), and the tool magazine fixing box (3) is arranged on the needling head rack (1); the X-direction guide rail (4) is arranged on the needling head frame (1), the Y-direction guide rail (5) is arranged on the X-direction guide rail (4), the needling head fixing box (6) is arranged on the Y-direction guide rail (5), and the X-direction guide rail (4) and the Y-direction guide rail (5) form a two-dimensional moving mechanism to drive the needling head fixing box (6) to move in an X-Y plane; the station selecting device (8) is fixed in the needling head fixing box (6), the needling driving device (7) is arranged on the station selecting device (8), and the needling plate (10) is fixed on the needling plate fixer (9); the needling plate fixer (9) is arranged on the needling driving device (7);
the material workbench comprises a material rack (20), a material box conveying mechanism (19) arranged at a material loading station of the material rack (20), a material box (17) arranged at a material storage station of the material rack (20), a material box bottom plate position control mechanism (18) arranged below the material box (17), an automatic material conveying mechanism (12) arranged between the material storage station of the material rack (20) and a finished product storage station, a needling bottom plate (15) arranged at a needling station of the material rack (20) and a needling bottom plate position control mechanism (16) arranged below the needling bottom plate (15), wherein the needling station is arranged on part or all of the automatic material conveying mechanism (12), a finished product box (13) arranged at a finished product storage station of the material rack (20) and a finished product box bottom plate position control mechanism (14) arranged below the finished product box (13), and a finished product box conveying mechanism (11) arranged at a discharging station of the material rack (20), and the material loading station, the material storage station, the machine frame needling station, the finished product storage station and the discharging station are sequentially arranged;
The method comprises the following steps:
s1: the preparation work is that firstly, the process requirements for needling are input into a human-computer interface of a needling machine; checking whether a needling plate (10) in the tool magazine (2) is matched with a needling process, equipment is lubricated, the specification and the size of a raw material box (17) are correct, materials (21) to be processed are correct, and the materials (21) in the raw material box (17) are properly placed; checking whether the work is correct or not, and starting the machine after confirming the correct work;
s2: the raw material box (17) is taken and placed, the raw material box (17) filled with materials (21) is placed on a raw material box conveying mechanism (19), the raw material box conveying mechanism (19) is started, and the raw material box conveying mechanism (19) conveys the raw material box (17) to a raw material storage station; when the material (21) does not exist in the material box (17), the material box conveying mechanism (19) automatically reverses, the material box (17) is taken out to a feeding station, and at the moment, the material box (17) filled with the material (21) is placed on the material box conveying mechanism (19) after the empty material box (17) is taken down at the feeding station;
s3: raw material is conveyed, the raw material in a raw material box (17) of a raw material storage station is conveyed to a needling station by a raw material automatic conveying mechanism (12), a needled material (21) is needled on a needled bottom plate (15) of the needling station, one layer is needled every time, and a needled bottom plate position control mechanism (16) controls the needled bottom plate (15) to descend by the thickness of one layer of the material (21); at the moment, the bottom plate of the raw material box (17) of the raw material storage station is controlled by a raw material box bottom plate position control mechanism (18), the thickness of a layer of material (21) is lifted upwards, and the material (21) is protruded; the layer of material (21) is sent to a needling station by an automatic material conveying mechanism (12) and is needled by an automatic material feeding mechanism;
S4: when the material (21) is conveyed to a needling station, the needling plate (10) is required to be positioned, the X-direction guide rail (4) and the Y-direction guide rail (5) drive the needling head fixing box (6) to move in an X-Y plane, and the position of the needling plate (10) is determined; secondly, determining whether the station is a needling station or a tool changing station, and if the station is the tool changing station, changing the needling plate (10) is needed; if the needling station is adopted, the needling plate (10) needs to be driven to perform needling;
s5: after finished product conveying and needling of a brake pad are completed, the finished product is required to be conveyed into a finished product box (13) of a finished product storage station, and at the moment, a needling bottom plate position control mechanism (16) drives a needling bottom plate (15) to move upwards by a distance of one product thickness to protrude the product; at the same time, the bottom plate position control mechanism (14) of the finished product box moves upwards to enable the bottom plate position of the finished product or empty box in the product box to be flush with the position of the needling bottom plate (15); starting an automatic material conveying mechanism (12) to push a material (21) to the bottom plate position of a finished product box (13) of a finished product storage station; at the moment, the bottom plate position control mechanism (14) of the finished product box moves downwards, so that the upper surface position of the bottom plate of the finished product box or the empty box in the product box is level with the position of the needling bottom plate (15); preparing for placing the next brake pad needling finished product; then the automatic material conveying mechanism (12) reverses and returns to the position before starting;
S6: taking and placing the finished product box (13), and when the finished product box (13) of the raw material box is filled with the needled product, automatically operating a finished product box conveying mechanism (11) to convey the finished product box (13) to a blanking station; at the moment, a worker takes off a finished product box (13) filled with needled products at a blanking station; then, the empty finished product box (13) is placed on the finished product box conveying mechanism (11), the finished product box conveying mechanism (11) is started, and the finished product box conveying mechanism (11) conveys the empty finished product box (13) to a finished product storage station.
2. The method for producing a brake pad according to claim 1, wherein: the step S4 specifically comprises the following steps:
s4.1: needling process
If in the needling station, a station selecting device (8) arranged in a needling head fixing box (6) moves downwards to drive a needling driving device (7), a needling plate fixer (9) and a needling plate (10) to move downwards in place, and then the needling driving device (7) drives the needling plate (10) to move upwards and downwards; the downward movement of the needling plate (10) is needling action, and the upward movement is the withdrawal of the needled raw material;
after the needling plate (10) completely withdraws from the material (21), the X-direction guide rail (4) drives the needling head fixing box (6) to move by the distance of one needling plate (10) in the X direction, and then needling is continued; after the material (21) in the X direction is completely needled, the Y-direction guide rail (5) drives the needling head fixing box (6) to move in the X-Y plane by one needling plate (10) position, and then needling is restarted; the X-direction guide rail (4) drives the needling head fixing box (6) to move by a distance equal to the distance of the needling plate (10) in the-X direction until the material (21) in the-X direction is completely needled, and the Y-direction guide rail (5) drives the needling head fixing box (6) to move by a position equal to the needling plate (10) in the X-Y plane and then needling is restarted; if so, the needling of the material (21) in the X-Y plane is completed repeatedly; after that, the needling plate (10) needs to be replaced, and the tool changing station is entered, so that the needling plate (10) needs to be replaced;
S4.2: tool changing
A station selection device (8) arranged in the needling head fixing box (6) moves upwards to drive a needling driving device (7), a needling plate fixer (9) and a needling plate (10) to move upwards to a proper position, and then an X-direction guide rail (4) and a Y-direction guide rail (5) drive the needling head fixing box (6) to move in an X-Y plane to convey the needling plate (10) to a cutter changing position; meanwhile, a power device in a tool magazine fixing box (3) drives a tool magazine (2) to confirm that' whether a tool position aligned with a tool changing position is a blank tool position? If the tool magazine is not empty in place, rotating the tool magazine (2) to rotate the empty tool position to a tool changing position; at the moment, the needling plate fixer (9) is loosened, and the needling plate (10) falls into the empty knife position; after that, a power device in the tool magazine fixing box (3) drives the tool magazine (2) to rotate, and the needling plate (10) which is required to be needled below is rotated to a tool changing position;
a station selecting device (8) arranged in the needling head fixing box (6) moves downwards to drive a needling driving device (7) and a needling plate fixer (9) to move downwards to a proper position, a new needling plate (10) is inserted into the needling driving device (7), and then the needling plate fixer (9) is locked; a station selection device (8) in the needling head fixing box (6) drives a needling driving device (7), a needling plate fixer (9) and a new needling plate (10) to retract to a cutter changing position to finish cutter changing;
S4.3: after the tool is changed, needling is carried out on the material (21) in an X-Y plane, and after needling is finished, the needling plate (10) is changed, and needling is continued until all needling of the layer of material (21) is finished; after needling of a layer of material (21) is completed, the process of raw material delivery is restarted until needling of a piece of product is completed.
3. The method for producing a brake pad according to claim 1, wherein: the tool magazine fixing box (3) comprises a driving servo motor, a speed reducer and a tool magazine rotating joint.
4. The method for producing a brake pad according to claim 1, wherein: the needling plate (10) is a small needling plate, and the small needling plate is a square needling plate with the needle plate side length being 1/N of the product side length, wherein N is more than or equal to 2 and N is N+.
5. The method for producing a brake pad according to claim 4, wherein: the value range of n is as follows: n is more than or equal to 3 and less than or equal to 10, and N is N+.
6. The method for producing a brake pad according to claim 1, wherein: the automatic needling head comprises a cutter magazine (2), an X-direction guide rail (4), a Y-direction guide rail (5), a needling driving device (7) and a station selecting device (8) of the needling head workbench, and a raw material box conveying mechanism (19), an automatic material conveying mechanism (12), a raw material box bottom plate position control mechanism (18), a needling bottom plate position control mechanism (16), a finished product box bottom plate position control mechanism (14) and a finished product box conveying mechanism (11) of the material workbench are driven by servo motors.
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| CN201151801Y (en) * | 2008-01-23 | 2008-11-19 | 湖南金博复合材料科技有限公司 | Needle machine auto-feeder |
| CN102505340A (en) * | 2011-10-14 | 2012-06-20 | 大连隆田科技有限公司 | Method and device for preparing pre-oxidation fiber thick felt |
| CN202575458U (en) * | 2012-04-25 | 2012-12-05 | 福建省晋江市和盛机械有限公司 | Automatic plate feeding and discharging device |
| CN103835067A (en) * | 2014-03-13 | 2014-06-04 | 宜兴市宜泰碳纤维织造有限公司 | Quasi-three dimensional prefabricated member |
| CN105773264A (en) * | 2016-05-04 | 2016-07-20 | 苏州科技学院 | Automatic tool changer (ATC) with manipulator and incessantly rotating spindle for machining center |
| CN107435187A (en) * | 2017-07-25 | 2017-12-05 | 常州大学 | Isostatic pressed linkage D refraction statics braider |
| CN107378085A (en) * | 2017-08-10 | 2017-11-24 | 中科图灵视控（北京）智能科技有限公司 | One kind is based on machine vision intelligence deburring flexibility automatic processing system |
| CN209178607U (en) * | 2018-12-11 | 2019-07-30 | 上海善巧碳素设备科技有限公司 | Brake block needing machine |
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