A needle hook for a terry jacquard machine and its forming process

Abstract

The present invention relates to a needle hook for a terry jacquard machine and its forming process, characterized in that: a needle hook for a terry jacquard machine includes a three-layer structure welded together, namely an upper layer, a middle layer and a lower layer. The upper layer and the lower layer are both needle hook pieces. The left end of the needle hook piece is in a hook-shaped structure. The middle layer is a positioning and guiding piece, which is composed of a guiding part and a fixing part connected integrally from left to right. The right end of the fixing part and the right end of the needle hook piece are both in a needle-shaped structure. The right end of the fixing part is fixed between the right ends of the upper and lower needle hook pieces. The left end of the guiding part extends between the upper and lower hook-shaped structures and is fixedly connected thereto. A guiding groove for the sliding of the needle knife structure is formed between the rear side end face of the guiding part and the inner side walls of the upper and lower needle hook pieces. This design has the advantages of simple structure, easy manufacturing, practicality and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of needle hooks of cut-loop terry jacquard machines, and particularly relates to a needle hook of a cut-loop terry jacquard machine and its forming process. Background Art

[0002] At present, the conventional cut-loop terry jacquard machine hook needle is of an integral type. The longitudinal groove on the top surface is generally machined by a disc milling process. The milling cutter is a consumable item and has a high price, resulting in high processing costs. Moreover, the speed of milling a long groove is slow, only 1 root can be milled in 1 minute, and the efficiency is extremely low. And during the groove milling process, burrs are easily turned up, resulting in an uneven groove wall, and the burrs formed at the opening during the groove milling process are very difficult to remove, bringing difficulties to the processing of the needle hook. The difficulty of groove milling alignment is also relatively high, and offset grooves have been generated. Also, due to the need for groove milling, the blank for punching must be a soft material, which makes it necessary to perform quenching after the groove milling process. The needle body is slender and has grooves, and it is very difficult to control the quenching deformation amount. It is easily deformed after quenching and may also cause groove expansion. After quenching, tempering is also required. Special tooling fixtures for shaping are needed for tempering to reduce the variable amount of tempering, and the product will turn black after tempering, which increases the difficulty of polishing. To sum up, the current situation of making cut-loop terry jacquard machine hook needles with many processes and difficult precision control has been caused. Summary of the Invention

[0003] The present invention designs a needle hook of a cut-loop terry jacquard machine and its forming process to solve the above problems. By forming a guiding groove for the sliding of the needle knife structure between the rear end face of the guiding part and the inner side walls of the upper and lower layers of needle hook pieces, the deficiencies of the existing groove milling technology are overcome by the above design, and the problems of low efficiency of milling long grooves, offset grooves, groove shrinkage, and large burrs are solved. Moreover, by adopting this design, the quenching process can be removed at the same time, reducing a factor causing deformation and increasing the practical performance.

[0004] To solve the above technical problems, the present invention provides a needle hook of a cut-loop terry jacquard machine, which is characterized in that: it includes a three-layer structure welded together, including an upper layer, a middle layer, and a lower layer. The upper layer and the lower layer are both needle hook pieces. The left end of the needle hook piece is in a hook-shaped structure. The middle layer is a positioning and guiding piece, which is composed of a guiding part and a fixing part connected together left and right. The right end of the fixing part and the right end of the needle hook piece are both in a needle-shaped structure. The right end of the fixing part is fixed between the right ends of the upper and lower layers of needle hook pieces. The left end of the guiding part extends between the two hook-shaped structures at the upper and lower parts and is fixedly connected thereto. The front end faces of the guiding part and the fixing part are aligned with the front end face of the needle hook piece. The rear end face of the fixing part is also aligned with the rear end face of the needle hook piece. The rear end face of the guiding part is flat and lower than the rear end face of the needle hook piece. A guiding groove for the sliding of the needle knife structure is formed between the rear end face of the guiding part and the inner side walls of the upper and lower layers of needle hook pieces.

[0005] Furthermore, the forming process of the needle hook of the above-mentioned cut pile jacquard machine specifically includes the following steps:

[0006] S1; Stamping manufacturing: Batch manufacture needle hook pieces and positioning guide pieces respectively through the cooperation of a stamping machine and a mold;

[0007] S2; Chamfering and deburring: Chamfer and deburr the needle hook pieces and positioning guide pieces manufactured in step S1 respectively through a chamfering machine and a grinding machine;

[0008] S3; First welding: Stack each positioning guide piece processed in step S2 between the upper and lower two needle hook pieces through an automatic welding machine, and perform laser welding on the front end faces of the positioning guide piece and the needle hook pieces, so that each positioning guide piece is integrated with the upper and lower two needle hook pieces except for the needle-like structure part, forming a preliminary needle hook structure;

[0009] S4; Second welding: Perform re-welding on the preliminary needle hook structure through a handheld laser welder, so that the needle-like structures of the positioning guide piece are integrated with the needle-like structures of the upper and lower two layers of needle hook pieces, forming a needle hook structure;

[0010] S5; Polishing: Put the needle hook structure processed in step S4 into a polishing machine to process the

[0011] surface and the weld seam.

[0012] Furthermore: The automatic welding machine in step S3 includes a workbench, a hook piece feeding mechanism, a positioning guide piece feeding mechanism, a conveying mechanism, a hook piece handling mechanism, a positioning guide piece handling mechanism, and a laser welding mechanism. The conveying mechanism and the laser welding mechanism are fixed on the workbench. The laser welding mechanism is arranged on one side at one end of the conveying mechanism. The hook piece feeding mechanism and the hook piece handling mechanism are arranged on the workbench on the other side at one end of the conveying mechanism. The positioning guide piece feeding mechanism and the positioning guide piece handling mechanism are arranged on the workbench on the other side at the other end of the conveying mechanism. The hook piece handling mechanism is composed of a second mounting frame, a first support plate, and a first suction cup manipulator. The positioning guide piece handling mechanism is composed of a third mounting frame, a second support plate, and a second suction cup manipulator. The second mounting frame and the third mounting frame are respectively fixed on the tops of the workbenches on both sides of the conveying mechanism. The first support plate is vertically fixed on the top of one side of the second mounting frame. The second support plate is also vertically fixed on the top of one side of the third mounting frame. The first suction cup manipulator and the second suction cup manipulator are respectively connected to the first support plate and the second support plate through a manipulator handling mechanism. The conveying mechanism is composed of a first mounting frame, a sliding seat, a lead screw conveying device, a translation electric cylinder, a translation slide rail, a translation slider, a guiding seat, a translation plate, and a conveying tooling. The first mounting frame is fixed on the workbench. The translation slide rail is fixed on the top of the first mounting frame. The translation plate is slidably connected to the translation slide rail through the translation slider arranged at the bottom. The translation electric cylinder is installed on the first mounting frame and is connected to the translation plate. The lead screw conveying device is fixed on the translation plate. The guiding seat is located on the front side of the lead screw conveying device and is fixedly connected to the first mounting frame. The conveying tooling is connected to the lead screw conveying device through the sliding seat. The extending direction of the output shaft end of the translation electric cylinder is parallel to the translation slide rail and perpendicular to the conveying direction of the lead screw conveying device. A plurality of positioning auxiliary turntables are arranged on the top of the guiding seat. The plurality of positioning auxiliary turntables are arranged in a "one" shape and are rotatably connected to the top of the guiding seat. A first notch for welding is opened on one side of the guiding seat close to the laser welding mechanism.

[0013] Furthermore: The lead screw conveying device includes a long strip-shaped outer shell, a lead screw, a connecting seat, and a first servo motor. The outer shell is fixed on the translation plate and its front and rear sides are open. The lead screw is horizontally rotatably connected in the outer shell and one end thereof is connected to the first servo motor fixed on the outer wall of one end of the outer shell. The connecting seat is slidably connected in the outer shell and a first threaded through hole is opened at its position relative to the lead screw. The connecting seat is connected to the lead screw through the first threaded through hole. The sliding seat extends into the inner part of the outer shell from the open parts on both sides of the outer shell and is fixedly connected to the connecting seat.

[0014] Furthermore: The conveying tooling includes a pushing and translating electric cylinder, a translating block, a pressing motor, and a pressing plate. The pushing and translating electric cylinder is fixed to the top of the sliding seat. The pressing motor is connected to the pushing and translating electric cylinder through the translating block. The pressing plate is connected to the output shaft of the pressing motor. An L-shaped pushing block is further connected to the translating block. The upper end of the L-shaped pushing block contacts the top of the guiding seat. A second notch is formed in the L-shaped pushing block at a position relative to the pressing plate.

[0015] Furthermore: The needle hook piece feeding mechanism is composed of a needle hook piece stacking seat, a first mounting plate, a first vertical plate, a first guide rail, a first guiding wheel, a first conveyor belt, a first lifting plate, and a second servo motor. The needle hook piece stacking seat is fixed to the workbench through the first mounting plate. The first vertical plate is arranged on the first mounting plate on one side of the needle hook piece stacking seat. The upper end of the first vertical plate is fixedly connected to the upper end of the needle hook piece stacking seat through a first connecting frame. The first guide rail is vertically fixed to the end face of the first vertical plate facing the needle hook piece stacking seat. Two first guiding wheels are arranged on the first vertical plate on one side of the first guide rail. The two first guiding wheels are arranged vertically and connected to each other through the first conveyor belt. One of the first guiding wheels is connected to the second servo motor fixed to the end face of the first vertical plate far from the needle hook piece stacking seat. One end of the first lifting plate extends into the needle hook piece stacking seat. A first through groove matching the first lifting plate is formed in the needle hook piece stacking seat. The first lifting plate can slide up and down along the first through groove. The first lifting plate is slidably connected to the first slide rail through a first slider. The first lifting plate is further fixedly connected to the first conveyor belt through a second connecting piece.

[0016] Furthermore: The positioning and guiding sheet feeding mechanism is composed of a connecting sheet stacking seat, a fifth mounting frame, a second vertical plate, a second guide rail, second guide wheels, a second conveyor belt, a second lifting plate, and a third servo motor. The connecting sheet stacking seat is fixed on the workbench through the fifth mounting frame. The second vertical plate is arranged on the fifth mounting frame on one side of the connecting sheet stacking seat. The upper end of the second vertical plate is fixedly connected to the upper end of the connecting sheet stacking seat through a second connecting frame. The second guide rail is vertically fixed on the end face of the second vertical plate facing the connecting sheet stacking seat. Two second guide wheels are arranged on the second vertical plate on one side of the second guide rail. The two second guide wheels are arranged vertically and connected to each other through the second conveyor belt. One of the second guide wheels is connected to the third servo motor fixed on the end face of the second vertical plate away from the connecting sheet stacking seat. One end of the second lifting plate extends into the connecting sheet stacking seat. A second through groove matching the second lifting plate is formed on the connecting sheet stacking seat. The second lifting plate can slide up and down along the second through groove. The second lifting plate is slidably connected to the second slide rail through a second slider. The second lifting plate is also fixedly connected to the second conveyor belt through a third connecting piece.

[0017] Furthermore: The laser welding mechanism includes a fourth mounting frame, a laser welding head, a laser welding gun, a welding wire, a guide tube, a hose, a welding wire feeder, and a laser welding gun translation cylinder. The laser welding head is fixed on the workbench through the fourth mounting frame. The laser welding gun is connected to the laser welding head through the laser welding gun translation cylinder. The guide tube is connected to the laser welding gun through a connecting frame. The guide tube is connected to the welding wire feeder through a hose. The welding wire feeder is detachably installed in the workbench. The welding wire extends to the front of the laser welding gun along the hose and the guide tube under the action of the welding wire feeder. The welding wire and the laser welding gun extend into the first notch under the action of the laser welding gun translation cylinder.

[0018] Furthermore: the manipulator handling mechanism includes a mounting seat, a driving servo motor, a lifting guide rail, a driving plate, a slider, a limiting slide rail and a limiting slider, a mounting seat is fixed to each of the upper end faces of one side of the first support plate and the second support plate, a driving servo motor is fixed to each of the upper end faces of the other side of the first support plate and the second support plate, a through hole is provided at the center of the mounting seat, the driving servo motor passes through the mounting seat along the through hole and is connected to one end of the driving plate, a slide groove is provided on the end face of the mounting seat away from the driving servo motor, the slide groove is composed of two arc grooves, the two arc grooves are symmetrically arranged with the through hole as the center, and the mounting seat directly above the through hole is provided with a through hole. A guide block is horizontally arranged on the end surface, and both ends of the guide block are connected to the upper ends of the two arc grooves. The slider is fixedly connected to the upper end of the lifting guide rail and is connected to the slide groove through the driving plate. The other end of the driving plate is provided with a guide slot, and the slider passes through the driving plate along the guide slot and can slide along the guide slot. The first suction cup manipulator and the second suction cup manipulator are fixed to the lower end of the lifting guide rail through mounting parts, and a limiting slide rail is horizontally arranged on the end surface of the mounting seat just below the through hole, and the limiting slide rail is slidably connected to the limiting slide rail and is provided with a guide slot matching the lifting guide rail, and the lifting guide rail passes through the limiting slide rail along the guide slot.

[0019] After adopting the above structure, the present invention adopts a three-layer structural design of upper, middle and lower layers, and forms a guide groove for the sliding of the needle knife structure between the rear end face of the guide part and the inner side walls of the upper and lower needle hook pieces. By adopting the above design, the problems of insufficient existing milling technology are overcome, and the problems of low efficiency, deviated grooves, shrinkage and large burrs in milling long grooves are solved. Moreover, the quenching process can be eliminated at the same time, reducing a factor causing deformation and increasing practical performance. In addition, the present invention automatically completes the welding and fixation of the needle hook piece and the connecting piece through an automatic welding machine, which greatly improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a diagram of the internal structure of a loop pile jacquard machine needle hook.

[0022] Figure 2 This is a structural diagram of the needle hook piece.

[0023] Figure 3 This is a structural diagram of the positioning guide piece.

[0024] Figure 4 It is a structural diagram of the automatic welding machine in step S3.

[0025] Figure 5It is a structural diagram after removing the needle hook piece feeding mechanism, positioning guide piece feeding mechanism, needle hook piece handling mechanism and positioning guide piece handling mechanism from the automatic welding machine.

[0026] Figure 6 It is Figure 5 an enlarged view of A in

[0027] Figure 7 the structural diagram of the conveying mechanism.

[0028] Figure 8 It is Figure 7 an enlarged view of B in

[0029] Figure 9 the structural diagram of the needle hook piece feeding mechanism.

[0030] Figure 10 the structural diagram of the needle hook piece handling mechanism.

[0031] Figure 11 the structural diagram of the positioning guide piece feeding mechanism.

[0032] Figure 12 the structural diagram of the positioning guide piece handling mechanism.

[0033] Figure 13 the structural diagram of the manipulator handling mechanism. Specific implementation manners

[0034] Such as Figure 1 、 Figure 2 and Figure 3A needle hook of a cut pile jacquard machine shown includes a three-layer structure welded together, including upper, middle, and lower layers. The uppermost and lowermost layers are both needle hook pieces 1. The left end of the needle hook piece is in a hook-shaped structure. The middle layer is a positioning and guiding piece 2. The positioning and guiding piece is composed of a guiding part and a fixing part connected integrally from left to right. The right end of the fixing part and the right end of the needle hook piece are both in a needle-shaped structure. The right end of the fixing part is fixed between the right ends of the upper and lower layers of needle hook pieces. The left end of the guiding part extends between the upper and lower hook-shaped structures and is fixedly connected thereto. The front end faces of the guiding part and the fixing part are aligned with the front end face of the needle hook piece. The rear end face of the fixing part is also aligned with the rear end face of the needle hook piece. The rear end face of the guiding part is flat and lower than the rear end face of the needle hook piece. A guiding groove for the sliding of the needle knife structure is formed between the rear end face of the guiding part and the inner side walls of the upper and lower layers of needle hook pieces. The present invention adopts a three-layer composite structure. The middle layer is composed of a connecting piece, a guiding piece, and a fixing piece. The upper end faces of the guiding piece and the fixing piece cooperate with the right end face of the extending part to form a guiding groove for the sliding of the blade between the two needle hook pieces. By adopting the above design, the deficiencies of the existing milling groove technology are overcome, and the problems of low efficiency, offset groove, shrinkage groove, and large burrs in milling long grooves are solved. At the same time, the quenching process is removed, reducing a factor causing deformation and increasing the practical performance.

[0035] The present invention also provides a forming process for the needle hook of a cut pile jacquard machine, which specifically includes the following steps:

[0036] S1; Stamping manufacturing: The needle hook pieces and the positioning and guiding pieces are respectively batch-manufactured through the cooperation of a stamping machine and a mold;

[0037] S2; Chamfering and deburring: The needle hook pieces and the positioning and guiding pieces manufactured in step S1 are respectively chamfered and deburred through a chamfering machine and a grinding machine;

[0038] S3; First welding: Each positioning and guiding piece processed in step S2 is stacked between the upper and lower needle hook pieces through an automatic welding machine, and the front end faces of the positioning and guiding piece and the needle hook piece are laser welded, so that each positioning and guiding piece is integrally connected to the upper and lower needle hook pieces except for the needle-shaped structure part, forming a preliminary needle hook structure;

[0039] S4; Second welding: The preliminary needle hook structure is welded again through a handheld laser welder, so that the needle-shaped structures of the positioning and guiding piece and the upper and lower layers of needle hook pieces are integrally connected, forming a needle hook structure;

[0040] S5; Polishing: The needle hook structure processed in step S4 is put into a polishing machine to process the surface and weld seams of the needle hook structure.

[0041] Such as Figure 4 、Figure 5 , Figure 7 , Figure 8 , Figure 10 and Figure 12The automatic welding machine in step S3 shown in the figure includes a workbench 3, a hook piece feeding mechanism 5, a positioning guide piece feeding mechanism, a conveying mechanism 4, a hook piece handling mechanism 7, a positioning guide piece handling mechanism 8, and a laser welding mechanism. The conveying mechanism and the laser welding mechanism are fixed on the workbench. The laser welding mechanism is arranged on one side at one end of the conveying mechanism. The hook piece feeding mechanism and the hook piece handling mechanism are arranged on the workbench on the other side at one end of the conveying mechanism. The positioning guide piece feeding mechanism and the positioning guide piece handling mechanism are arranged on the workbench on the other side at the other end of the conveying mechanism. The hook piece handling mechanism is composed of a second mounting frame 7-1, a first support plate 7-2, and a first suction cup manipulator 7-3. The positioning guide piece handling mechanism is composed of a third mounting frame 8-1, a second support plate 8-2, and a second suction cup manipulator 8-3. The second mounting frame and the third mounting frame are respectively fixed on the tops of the workbenches on both sides of the conveying mechanism. The first support plate is vertically fixed on the top of one side of the second mounting frame. The second support plate is also vertically fixed on the top of one side of the third mounting frame. The first suction cup manipulator and the second suction cup manipulator are respectively connected to the first support plate and the second support plate through a manipulator handling mechanism. The conveying mechanism is composed of a first mounting frame 4-1, a sliding seat 4-2, a lead screw conveying device, a translation cylinder 4-3, a translation slide rail 4-6, a translation slider, a guide seat 4-7, a translation plate 4-8, and a conveying tooling. The first mounting frame is fixed on the workbench. The translation slide rail is fixed on the top of the first mounting frame. The translation plate is slidably connected to the translation slide rail through a translation slider arranged at the bottom. The translation cylinder is installed on the first mounting frame and is connected to the translation plate. The lead screw conveying device is fixed on the translation plate. The guide seat is located on the front side of the lead screw conveying device and is fixedly connected to the first mounting frame. The conveying tooling is connected to the lead screw conveying device through the sliding seat. The extending direction of the output shaft end of the translation cylinder is parallel to the translation slide rail and perpendicular to the conveying direction of the lead screw conveying device. A plurality of positioning auxiliary turntables 4-17 are arranged on the top of the guide seat. The plurality of positioning auxiliary turntables 4-17 are arranged in a "one" shape and are rotatably connected to the top of the guide seat. A first notch for welding is opened on one side of the guide seat close to the laser welding mechanism. The top of the guide seat is set as a conveying station.During operation, first, a needle hook piece is placed on the conveying station of the guide seat through the needle hook piece feeding mechanism and the needle hook piece handling mechanism. Then, a positioning guide piece is placed on the needle hook piece through the positioning guide piece feeding mechanism and the positioning guide piece handling mechanism. Then, another needle hook piece is placed on the positioning guide piece through the needle hook piece feeding mechanism and the needle hook piece handling mechanism. The conveying tooling presses the stacked needle hook pieces and positioning guide pieces together, and adjusts the position through cooperation with several positioning auxiliary turntables. After the adjustment is completed, the lead screw conveying device is started for transportation. At this time, the laser welding mechanism is started to extend into the first notch. When the needle hook piece and the positioning guide piece are transported to the first notch, the front end faces of the needle hook piece and the positioning guide piece both extend out of the conveying station, and the laser welding mechanism is used to weld them. The present invention completes automatic welding during the conveying process, so that except for the needle-shaped structure parts, each positioning guide piece is connected integrally with the two needle hook pieces above and below it, forming a preliminary needle hook structure. By adopting the above structure, the present invention can automatically complete the welding and fixing of the positioning guide piece and the needle hook piece, greatly improving the welding efficiency. And adopting the above design can ensure the accuracy of the welding position, not easy to be misaligned, playing a role in increasing the practical performance.

[0042] As Figure 5 and Figure 7 shown, the lead screw conveying device includes a long strip-shaped outer housing 4-4, a lead screw, a connecting seat and a first servo motor 4-12. The outer housing is fixed on the translation plate and its front and rear sides are open. The lead screw is horizontally rotatably connected in the outer housing and one end of it is connected to the first servo motor fixed on the outer wall at one end of the outer housing. The connecting seat is slidably connected in the outer housing and a first threaded through hole is provided at its position relative to the lead screw. The connecting seat is connected to the lead screw through the first threaded through hole. The sliding seat extends into the inner part of the outer housing from the open parts on both sides of the outer housing and is fixedly connected to the connecting seat.

[0043] As Figure 9 shown, the conveying tooling includes a pushing translation electric cylinder 4-13, a translation block 4-14, a pressing motor 4-15 and a pressing plate 4-16. The pushing translation electric cylinder is fixed on the top of the sliding seat. The pressing motor is connected to the pushing translation electric cylinder through the translation block. The pressing plate is connected to the output shaft of the pressing electric cylinder. An L-shaped pushing block 4-9 is also connected to the translation block. The upper end of the L-shaped pushing block contacts the top of the guide seat. A second notch is provided at the position of the L-shaped pushing block relative to the pressing plate. When stacked, the pressing motor is started to use the pressing plate to press the stacked positioning guide pieces and needle hook pieces together. Then, the pushing translation electric cylinder is started to complete the position adjustment through the cooperation of the L-shaped pushing block and the positioning auxiliary turntable. By adopting this design, the welding precision and firmness can be effectively guaranteed, playing a role in increasing the practical performance.

[0044] AsFigure 10 The hook piece feeding mechanism shown is composed of a hook piece stacking seat 5-1, a first mounting plate 5-2, a first vertical plate 5-3, a first guide rail 5-5, a first guide wheel 5-4, a first conveyor belt, a first lifting plate 5-6, and a second servo motor 5-7. The hook piece stacking seat is fixed to the workbench through the first mounting plate. The first vertical plate is arranged on the first mounting plate on one side of the hook piece stacking seat. The upper end of the first vertical plate is fixedly connected to the upper end of the hook piece stacking seat through a first connecting frame 5-8. The first guide rail is vertically fixed on the side end face of the first vertical plate facing the hook piece stacking seat. Two first guide wheels are arranged on the first vertical plate on one side of the first guide rail. The two first guide wheels are arranged vertically and connected to each other through the first conveyor belt. One of the first guide wheels is connected to the second servo motor fixed on the side end face of the first vertical plate away from the hook piece stacking seat. One end of the first lifting plate extends into the hook piece stacking seat. A first through groove matching the first lifting plate is formed on the hook piece stacking seat. The first lifting plate can slide up and down along the first through groove. The first lifting plate is slidably connected to the first slide rail through a first slider. The first lifting plate is also fixedly connected to the first conveyor belt through a second connecting piece.

[0045] As Figure 12 The positioning guide piece feeding mechanism shown is composed of a connecting piece stacking seat 6-1, a fifth mounting frame 6-2, a second vertical plate 6-3, a second guide rail 6-4, a second guide wheel 6-5, a second conveyor belt 6-9, a second lifting plate 6-6, and a third servo motor 6-7. The connecting piece stacking seat is fixed to the workbench through the fifth mounting frame. The second vertical plate is arranged on the fifth mounting frame on one side of the connecting piece stacking seat. The upper end of the second vertical plate is fixedly connected to the upper end of the connecting piece stacking seat through a second connecting frame 6-8. The second guide rail is vertically fixed on the side end face of the second vertical plate facing the connecting piece stacking seat. Two second guide wheels are arranged on the second vertical plate on one side of the second guide rail. The two second guide wheels are arranged vertically and connected to each other through the second conveyor belt. One of the second guide wheels is connected to the third servo motor fixed on the side end face of the second vertical plate away from the connecting piece stacking seat. One end of the second lifting plate extends into the connecting piece stacking seat. A second through groove matching the second lifting plate is formed on the connecting piece stacking seat. The second lifting plate can slide up and down along the second through groove. The second lifting plate is slidably connected to the second slide rail through a second slider. The second lifting plate is also fixedly connected to the second conveyor belt through a third connecting piece.

[0046] As Figure 5 、 Figure 6 and Figure 7The shown laser welding mechanism includes a fourth mounting bracket 9-1, a laser welding head 9-2, a laser welding torch 9-3, a welding wire 9-4, a guiding cylinder 9-5, a hose 9-6, a welding wire feeder, and a laser welding torch translation electric cylinder. The laser welding head is fixed to the workbench through the fourth mounting bracket. The laser welding torch is connected to the laser welding head through the laser welding torch translation electric cylinder. The guiding cylinder is connected to the laser welding torch through a connecting bracket 9-7. The guiding cylinder is connected to the welding wire feeder through a hose. The welding wire feeder is detachably installed inside the workbench. The welding wire extends to the front of the laser welding torch along the hose and the guiding cylinder under the action of the welding wire feeder. The welding wire and the laser welding torch extend into the first notch under the action of the laser welding torch translation electric cylinder.

[0047] As Figure 13 The shown manipulator handling mechanism includes a mounting seat 10, a driving servo motor 11, a lifting guide rail 12, a driving plate 13, a slider 14, a limiting guide rail 15, and a limiting slider 16. One mounting seat is fixed to each of the upper end side end faces of the first support plate and the second support plate. One driving servo motor is fixed to each of the upper end side end faces of the first support plate and the second support plate. A through hole is provided at the center of the mounting seat. The driving servo motor passes through the mounting seat along the through hole and is connected to one end of the driving plate. A chute is provided on the end face of the mounting seat away from the driving servo motor. The chute is composed of two arc-shaped grooves 10-1. The two arc-shaped grooves are symmetrically arranged left and right with the through hole as the center. A guiding block 17 is horizontally arranged on the end face of the mounting seat directly above the through hole. The two ends of the guiding block are connected to the upper ends of the two arc-shaped grooves. The slider is fixedly connected to the upper end of the lifting guide rail and passes through the driving plate and is connected in the chute. A guiding through groove is provided at the other end of the driving plate. The slider passes through the driving plate along the guiding through groove and can slide along the guiding through groove. The first suction cup manipulator and the second suction cup manipulator are fixed to the lower end of the lifting guide rail through mounting parts. A limiting guide rail is horizontally arranged on the end face of the mounting seat directly below the through hole. The limiting slider is slidably connected to the limiting guide rail and is provided with a guiding groove matching the lifting guide rail. The lifting guide rail passes through the limiting slider along the guiding groove. After the present invention adopts the above structure, the lifting guide rail can automatically complete the adjustment of the horizontal position and the vertical position through the driving rotation of the driving servo motor. It has the advantages of simple structure, easy manufacturing, and practical and efficient.

[0048] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. A needle hook of a cut pile jacquard machine, characterized in that: The invention comprises a three-layer structure welded together, namely, an upper layer, a middle layer and a lower layer, wherein the uppermost layer and the lowermost layer are both needle hook pieces (1), the left end of the needle hook piece is a hook-shaped structure, and the layer in the middle is a positioning guide piece (2), the positioning guide piece is composed of a guide part and a fixed part connected together on the left and right sides, the right end of the fixed part and the right end of the needle hook piece are both needle-shaped structures, the right end of the fixed part is fixed between the right ends of the upper and lower layers of needle hook pieces, the left end of the guide part extends between the upper and lower hook-shaped structures and is fixedly connected thereto, the front end faces of the guide part and the fixed part are aligned with the front end face of the needle hook piece, the rear end face of the fixed part is also aligned with the rear end face of the needle hook piece, the rear end face of the guide part is flat and lower than the rear end face of the needle hook piece, and a guide groove for sliding of the needle knife structure is formed between the rear end face of the guide part and the inner side walls of the upper and lower layers of needle hook pieces; The above-mentioned forming process of the loop pile jacquard machine needle hook specifically comprises the following steps: S1; Stamping manufacturing: The needle hook piece and the positioning guide piece are manufactured in batches through the cooperation of the stamping machine and the mold; S2; chamfering and deburring: the needle hook piece and the positioning guide piece manufactured in step S1 are chamfered and deburred by a chamfering machine and a grinder respectively; S3; First welding: Each positioning guide piece processed in step S2 is stacked between the upper and lower needle hook pieces by an automatic welding machine, and the front end surfaces of the positioning guide piece and the needle hook piece are laser welded so that each positioning guide piece and its upper and lower needle hook pieces are connected as one body except for the needle-shaped structure portion, thereby forming a preliminary needle hook structure; S4; Second welding: The preliminary needle hook structure is welded again by a handheld laser welder, so that the needle-like structure of the positioning guide piece and the needle-like structures of the upper and lower layers of the needle hook piece are connected into one, forming a needle hook structure; S5； Polishing: The needle hook structure processed in step S4 is placed in a polishing machine to process the surface and weld of the needle hook structure.

2. The needle hook of a terry jacquard machine according to claim 1, characterized in that: The automatic welding machine in the step S3 includes a workbench (3), a hook piece loading mechanism (5), a positioning guide piece loading mechanism, a conveying mechanism (4), a hook piece handling mechanism (7), a positioning guide piece handling mechanism (8) and a laser welding mechanism. The conveying mechanism and the laser welding mechanism are fixed on the workbench. The laser welding mechanism is arranged on one side at one end of the conveying mechanism. The hook piece loading mechanism and the hook piece handling mechanism are arranged on the workbench on the other side at one end of the conveying mechanism. The positioning guide piece loading mechanism and the positioning guide piece handling mechanism are arranged on the workbench on the other side at the other end of the conveying mechanism. The hook piece handling mechanism is composed of a second mounting frame (7-1), a first support plate (7-2) and a first suction cup manipulator (7-3). The positioning guide piece handling mechanism is composed of a third mounting frame (8-1), a second support plate (8-2) and a second suction cup manipulator (8-3). The second mounting frame and the third mounting frame are respectively fixed on the tops of the workbenches on both sides of the conveying mechanism. The first support plate is vertically fixed on the top of one side of the second mounting frame. The second support plate is also vertically fixed on the top of one side of the third mounting frame. The first suction cup manipulator and the second suction cup manipulator are respectively connected to the first support plate and the second support plate through a manipulator handling mechanism. The conveying mechanism is composed of a first mounting frame (4-1), a sliding seat (4-2), a lead screw conveying device, a translation cylinder (4-3), a translation slide rail (4-6), a translation slider, a guiding seat (4-7), a translation plate (4-8) and a conveying tooling. The first mounting frame is fixed on the workbench. The translation slide rail is fixed on the top of the first mounting frame. The translation plate is slidably connected to the translation slide rail through a translation slider arranged at the bottom. The translation cylinder is mounted on the first mounting frame and is connected to the translation plate. The lead screw conveying device is fixed on the translation plate. The guiding seat is located on the front side of the lead screw conveying device and is fixedly connected to the first mounting frame. The conveying tooling is connected to the lead screw conveying device through the sliding seat. The extending direction of the output shaft end of the translation cylinder is parallel to the translation slide rail and perpendicular to the conveying direction of the lead screw conveying device. A plurality of positioning auxiliary turntables (4-17) are arranged on the top of the guiding seat. The plurality of positioning auxiliary turntables (4-17) are arranged in a "one" shape and are rotatably connected to the top of the guiding seat. A first notch for welding is formed on one side of the guiding seat close to the laser welding mechanism.

3. A needle hook of a terry jacquard machine according to claim 2, characterized in that: The described lead screw conveying device includes a long strip-shaped outer casing (4-4), a lead screw, a connecting seat, and a first servo motor (4-12). The outer casing is fixed on the translation plate and its front and rear sides are open. The lead screw is horizontally rotatably connected inside the outer casing and one end thereof is connected to the first servo motor fixed on the outer wall at one end of the outer casing. The connecting seat is slidably connected inside the outer casing and a first threaded through hole is provided at its position relative to the lead screw. The connecting seat is connected to the lead screw through the first threaded through hole. The sliding seat extends into the inner part from the open parts on both sides of the outer casing and is fixedly connected to the connecting seat.

4. A needle hook of a terry jacquard machine according to claim 2, characterized in that: The described conveying tooling includes a pushing and translating electric cylinder (4-13), a translating block (4-14), a pressing motor (4-15), and a pressing plate (4-16). The pushing and translating electric cylinder is fixed on the top of the sliding seat. The pressing motor is connected to the pushing and translating electric cylinder through the translating block. The pressing plate is connected to the output shaft of the pressing motor. An L-shaped pushing block (4-9) is also connected to the translating block. The upper end of the L-shaped pushing block contacts the top of the guiding seat. A second notch is provided at the position of the L-shaped pushing block relative to the pressing plate.

5. A needle hook of a terry jacquard machine according to claim 2, characterized in that: The described needle hook piece feeding mechanism is composed of a needle hook piece stacking seat (5-1), a first mounting plate (5-2), a first vertical plate (5-3), a first guide rail, a first guide wheel, a first conveyor belt, a first lifting plate, and a second servo motor. The needle hook piece stacking seat is fixed on the workbench through the first mounting plate. The first vertical plate is arranged on the first mounting plate on one side of the needle hook piece stacking seat. The upper end of the first vertical plate is fixedly connected to the upper end of the needle hook piece stacking seat through a first connecting frame. The first guide rail is vertically fixed on the side end face of the first vertical plate facing the needle hook piece stacking seat. Two first guide wheels are arranged on the first vertical plate on one side of the first guide rail. The two first guide wheels are arranged up and down and are connected to each other through the first conveyor belt. One of the first guide wheels is connected to the second servo motor fixed on the side end face of the first vertical plate far from the needle hook piece stacking seat. One end of the first lifting plate extends into the needle hook piece stacking seat. A first through groove matching the first lifting plate is provided on the needle hook piece stacking seat. The first lifting plate can slide up and down along the first through groove. The first lifting plate is slidably connected to the first slide rail through a first slider. The first lifting plate is also fixedly connected to the first conveyor belt through a second connecting piece.

6. A latch hook for a terry jacquard machine according to claim 2, characterized in that: The positioning and guiding sheet loading mechanism described above is composed of a connecting sheet stacking seat (6-1), a fifth mounting frame (6-2), a second vertical plate (6-3), a second guide rail (6-4), a second guide wheel (6-5), a second conveyor belt, a second lifting plate (6-6) and a third servo motor (6-7). The connecting sheet stacking seat is fixed on the workbench through the fifth mounting frame. The second vertical plate is arranged on the fifth mounting frame on one side of the connecting sheet stacking seat. The upper end of the second vertical plate is fixedly connected to the upper end of the connecting sheet stacking seat through a second connecting frame (6-8). The second guide rail is vertically fixed on the end face of the second vertical plate facing the connecting sheet stacking seat. Two second guide wheels are arranged on the second vertical plate on one side of the second guide rail. The two second guide wheels are arranged up and down and are connected to each other through the second conveyor belt. One of the second guide wheels is connected to the third servo motor fixed on the end face of the second vertical plate far from the connecting sheet stacking seat. One end of the second lifting plate extends into the connecting sheet stacking seat. A second through groove matching the second lifting plate is opened on the connecting sheet stacking seat. The second lifting plate can slide up and down along the second through groove. The second lifting plate is slidably connected to the second slide rail through a second slider. The second lifting plate is also fixedly connected to the second conveyor belt through a third connecting piece.

7. The needle hook of a terry jacquard machine according to claim 2, characterized in that: The laser welding mechanism described above includes a fourth mounting frame (9-1), a laser welding head (9-2), a laser welding torch (9-3), a welding wire (9-4), a guide cylinder (9-5), a hose (9-6), a welding wire feeder and a laser welding torch translation cylinder. The laser welding head is fixed on the workbench through the fourth mounting frame. The laser welding torch is connected to the laser welding head through the laser welding torch translation cylinder. The guide cylinder is connected to the laser welding torch through a connecting frame (9-7). The guide cylinder is connected to the welding wire feeder through a hose. The welding wire feeder is detachably installed in the workbench. The welding wire extends to the front of the laser welding torch along the hose and the guide cylinder under the action of the welding wire feeder. The welding wire and the laser welding torch extend into the first notch under the action of the laser welding torch translation cylinder.

8. A needle hook of a terry jacquard machine according to claim 2, characterized in that: The described manipulator handling mechanism includes a mounting base (10), a driving servo motor (11), a lifting guide rail (12), a driving plate (13), a slider (14), a limit slide rail (15) and a limit slider (16). One mounting base is fixed to each of the upper end side end faces of the first support plate and the second support plate. One driving servo motor is fixed to each of the upper end other side end faces of the first support plate and the second support plate. A through hole is provided at the center of the mounting base. The driving servo motor passes through the mounting base along the through hole and is connected to one end of the driving plate. A chute is provided on the end face of the mounting base away from the driving servo motor. The chute is composed of two arc-shaped grooves, and the two arc-shaped grooves are symmetrically arranged left and right with the through hole as the center. A guide block (17) is horizontally arranged on the end face of the mounting base directly above the through hole. The two ends of the guide block are connected to the upper ends of the two arc-shaped grooves. The slider is fixedly connected to the upper end of the lifting guide rail and passes through the driving plate and is connected in the chute. A guide through groove is provided at the other end of the driving plate. The slider passes through the driving plate along the guide through groove and can slide along the guide through groove. The first suction cup manipulator and the second suction cup manipulator are fixed to the lower end of the lifting guide rail through mounting parts. A limit slide rail is horizontally arranged on the end face of the mounting base directly below the through hole. The limit slider is slidably connected to the limit slide rail and is provided with a guide groove matching the lifting guide rail. The lifting guide rail passes through the limit slider along the guide groove.

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