A continuous punching device for rubber and plastic hoses

Abstract

The present invention relates to a continuous punching device for rubber and plastic hoses, comprising a frame assembly for carrying and installing various components, and a hose positioning pulley assembly arranged on the frame assembly, used for guiding and positioning the hose when punching; a punching hole assembly, used for punching out symmetrical and continuous rows of holes for the hose, provided with two groups, symmetrically arranged on both sides of the hose positioning pulley assembly; a power assembly, which is transmission-connected with the punching hole assembly and provides power for it; and a locking assembly, which is used to control the locking or loosening of the punching hole assembly. Compared with the prior art, the present device can realize continuous punching hole processing, is easy to operate, greatly improves production efficiency, does not cause the phenomenon of missing punching holes, and has high hole position accuracy, and product quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a continuous punching device for a rubber or plastic pipe. Background Art

[0002] In the process of processing soft rubber hoses, it is sometimes necessary to punch small holes with required shapes and sizes on the wall of soft rubber hoses. Patent CN209831840U discloses a precise hose punching device, which uses the sharp blade of a cutter punch to cut holes in the hose. The hose with a nylon mandrel inserted is placed in a punching fixture. The punching fixture is provided with a set of cutting punch guide holes. The cutting punch is installed in the guide hole and can be processed on a punching machine or a riveting machine. Because the hole is cut by the blade, the hole wall is smooth without burrs and pressure angle surfaces, which greatly reduces the turbulence and disturbance of gas and liquid when they flow out.

[0003] In actual product applications, symmetrical, continuous and equidistant rows of holes are often punched out on the hose. With the existing technology, after completing the processing of one hole, the cutting punch needs to be manually removed from the fixture, the waste in the cutting punch hole is removed, and then the next hole is put into the adjacent positioning hole for processing. The work efficiency is very low. Due to the high density of the holes, the cutting punch may be missed when it is shifted, which poses a hidden danger to the quality of the finished product and becomes a bottleneck that hinders efficiency improvement and quality stability. Summary of the invention

[0004] The purpose of the present invention is to provide a continuous punching device for rubber and plastic pipes in order to solve the above problems. The device can realize continuous punching and cutting, thereby greatly improving production efficiency.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A continuous punching device for rubber and plastic pipes, comprising a frame assembly for carrying and installing various components, and a device arranged on the frame assembly:

[0007] Hose positioning pulley assembly, used for guiding and positioning when drilling holes in the hose;

[0008] Punching hole assembly, used for punching out symmetrical and continuous rows of holes for the hose, provided with two groups, symmetrically arranged on both sides of the hose positioning pulley assembly;

[0009] A power assembly, which is in driving connection with the punching hole assembly and provides power therefor;

[0010] The locking assembly is used to control the locking or releasing of the punching hole assembly.

[0011] Furthermore, the hose positioning pulley assembly is composed of multiple groups of pulleys arranged in pairs; the spacing between each pair of pulleys matches the outer diameter of the hose and can just pass the hose; the multiple groups of paired pulleys restrict the freedom of the hose except for the axial movement of the hose.

[0012] Furthermore, the hose positioning pulley assembly is provided with three groups, which are the front positioning pulley, the middle positioning pulley and the rear positioning pulley in the moving direction of the hose;

[0013] The front positioning pulley and the rear positioning pulley are installed horizontally through the pulley bracket, and the middle positioning pulley is installed vertically up and down through the pulley bracket.

[0014] Furthermore, the punching hole assembly is hinged to the frame assembly and can swing at a certain angle.

[0015] Furthermore, the locking assembly is composed of a pair of locking cams that can rotate towards each other, wherein one locking cam is fixedly connected to a locking wrench, the two locking cams are connected by a connecting rod, and the locking cam abuts against the punching hole assembly.

[0016] When the locking wrench is pulled to drive one of the locking cams to rotate, it rotates synchronously with the other locking cam through the connecting rod. When it reaches the locking position, the highest points of the two locking cams act on the punching hole assembly, and the punching hole assemblies on both sides are synchronously and symmetrically pushed to the punching stop point, and the punching hole assembly is locked at the same time; when it reaches the release position, the lowest points of the two locking cams act on the punching hole assembly, and the punching hole assembly is released.

[0017] Furthermore, the punching hole assembly includes a mounting wheel bracket, a transmission shaft, a mounting wheel and a transmission gear, the transmission shaft is vertically mounted on the mounting wheel bracket, the mounting wheel is mounted on the upper end of the transmission shaft, the transmission gear is mounted on the lower end of the transmission shaft, and the transmission gear is connected to the power assembly through a gear transmission assembly; a plurality of pairs of cutting punches for punching holes in the hose are equally installed in the circumferential direction of the mounting wheel, and the mounting wheel rotates with the transmission shaft to punch holes in the hose between the two mounting wheels.

[0018] Furthermore, a movable waste ejector pin is installed at the center of the cutting punch, and the mounting wheel bracket is fixedly connected to a waste ejector cam and a waste ejector pin reset block;

[0019] The waste ejection cam is arranged on the inner side of the mounting wheel. When the mounting wheel rotates, the waste ejector pin is ejected out of the cutting punch when it passes the highest point of the waste ejection cam, and the waste inside the cutting punch is ejected.

[0020] The waste ejector reset block is arranged on the outer side of the mounting wheel and is an arc-shaped block. When the mounting wheel rotates, the ejected waste ejector is pressed back into the cutting punch when passing through the waste ejector reset block.

[0021] Further, the power assembly is composed of a servo motor, a servo motor bracket and a gear transmission assembly. The servo motor is installed on the frame assembly through the servo motor bracket, and the output shaft of the servo motor is in transmission connection with the punching hole assembly through the gear transmission assembly.

[0022] Further, the frame assembly is composed of a frame bottom plate and a frame. The frame is vertically installed on the side of the frame bottom plate.

[0023] The rubber tube positioning pulley assembly and the locking assembly are installed on the frame bottom plate, and the punching hole assembly and the power assembly are installed on the frame.

[0024] Further, when punching the rubber tube, a nylon mandrel is inserted into the inside, and then it passes through the punching device.

[0025] The specific working process of the device of the present invention is as follows. During work, the nylon mandrel is manually stuffed into the rubber and plastic tube. The distance of the nylon mandrel stuffed is determined according to the number of rows of holes to be opened on the rubber and plastic tube. The locking wrench is placed in the open position, the lowest point of the locking cam contacts the mounting wheel bracket, and a pair of punching hole assemblies rotate outwards to the open point, so that the distance between a pair of opposite cutting punches is the largest. The rubber and plastic tube stuffed with the nylon mandrel is pushed into a pair of front positioning pulleys and continues to move forward into a pair of middle positioning pulleys. After determining the distance between the starting hole and the top end of the rubber tube, the locking wrench is turned to the locking position. At this time, the highest point of the locking cam contacts the cutting punch mounting bracket, and a pair of punching hole assemblies rotate inwards to the locking point, so that the cutting edges of the cutting punches cut into the wall of the rubber and plastic tube until the nylon mandrel, and round holes are punched out on the rubber and plastic tube.

[0026] The waste of the round holes remains in the cutting punch. After the first group of holes are processed, the servo motor is started accordingly. Driven by the rotating gears, a pair of mounting wheels rotate synchronously towards each other. The cutting punches installed on the mounting wheels enter the rubber and plastic tube one by one. Because the previous pair of cutting punches have not completely left the rubber and plastic tube after punching, and the latter pair of cutting punches have already started to enter, the rubber tube can be synchronously moved when the mounting wheels rotate, so as to complete the continuous punching of holes on the rubber and plastic tube. As the rubber and plastic tube moves forward, the processed part enters a group of rear positioning pulleys. Because the number of rows of holes of different products is different, the number of punching holes on the rubber and plastic tube can be completed through the program preset by the servo motor. After the number of punching rows is completed, the control system sends a signal to rotate the locking handle to the open position, and the cutting punches also leave the rubber and plastic tube accordingly. The rubber and plastic tube is taken out from the positioning pulleys, and the nylon mandrel in the rubber and plastic tube is taken out. The punching and rowing processing of the rubber and plastic tube is completed.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] (1) Continuous punching processing can be achieved, greatly improving production efficiency.

[0029] (2) It is easy to operate, and general operators can perform operations after simple training.

[0030] (3) The phenomenon of missed punching will not occur, and the product quality is guaranteed.

[0031] (4) The hole position accuracy is high, fully meeting the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a three-dimensional structural schematic diagram of a continuous punching device for rubber and plastic hoses according to the present invention;

[0033] Figure 2 is Figure 1 the front view of;

[0034] Figure 3 is Figure 2 the left view of;

[0035] Figure 4 is Figure 1 the top view of;

[0036] Figure 5 is Figure 4 the partial view A of;

[0037] Figure 6 is Figure 4 the partial view B of;

[0038] Figure 7 is Figure 4 the partial view C of;

[0039] In the figure: 1 - servo motor; 2 - frame; 3 - frame bottom plate; 4 - left locking cam; 5 - cutting punch; 6 - rubber and plastic hose; 7 - nylon mandrel; 8 - locking wrench; 9 - right punching hole assembly; 10 - right mounting wheel; 11 - rear positioning pulley; 12 - transmission gear; 13 - left mounting wheel; 14 - connecting rod; 15 - right locking cam; 16 - waste ejector pin; 17 - waste ejector pin reset block; 18 - waste ejection cam; 19 - rear positioning pulley bracket; 20 - front positioning pulley bracket; 21 - servo motor bracket; 22 - left punching hole assembly; 23 - transmission shaft; 24 - right mounting wheel bracket; 26 - intermediate positioning pulley; 27 - intermediate positioning pulley bracket; 28 - three pairs of positioning pulleys; 29 - locking assembly; 30 - power assembly; 31 - frame assembly; 32 - front positioning pulley; 33 - left mounting wheel bracket. DETAILED DESCRIPTION OF THE INVENTION

[0040] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example

[0042] like Figure 1 A continuous punching device for rubber and plastic hoses is composed of a pair of left punching hole components 22 and right punching hole components 9, three pairs of positioning pulleys 28, a locking component 29, a power component 30, and a frame component 31. The three pairs of positioning pulleys 28 are used for guiding and positioning when punching holes in the hose; the left punching hole component 22 and the right punching hole component 9 are used to punch out symmetrical and continuous rows of holes in the hose, the power component 30 is connected to the punching hole component and provides power for it, and the locking component 29 is used to control the locking or loosening of the punching hole component. The device can effectively and automatically complete the precise punching of rows of holes on the rubber and plastic hose.

[0043] like Figure 2 The frame assembly is composed of a frame bottom plate 3 and a frame 2. The frame 2 is vertically installed on the side of the frame bottom plate 3. The hose positioning pulley assembly and the locking assembly are installed on the frame bottom plate. The punching hole assembly and the power assembly are installed on the frame.

[0044] like Figure 3 , 4 The hose positioning pulley assembly is composed of multiple sets of pulleys arranged in pairs. The spacing between each pair of pulleys matches the outer diameter of the hose and can just pass the hose. The multiple sets of paired pulleys restrict the hose's freedom except for the axial movement of the hose. Figure 2 , 3 4. The hose positioning pulley assembly is provided with three groups, which are the front positioning pulley 32, the middle positioning pulley 26 and the rear positioning pulley 11 along the moving direction of the hose; the front positioning pulley 32 and the rear positioning pulley 11 are horizontally installed through the front positioning pulley bracket 20 and the rear positioning pulley bracket 19 respectively, and the middle positioning pulley 26 is vertically installed up and down through the middle positioning pulley bracket 27.

[0045] The punching hole assembly is hinged on the frame assembly and can swing at a certain angle. The locking assembly consists of a pair of locking cams 4 / 15 that can rotate toward each other, one of which is fixedly connected to a locking wrench 8, and the two locking cams are connected by a connecting rod 14, and the locking cam abuts against the punching hole assembly.

[0046] The punching hole assembly includes a mounting wheel bracket 24 / 33, a transmission shaft 23, a mounting wheel 10 / 13 and a transmission gear 12. The transmission shaft is vertically mounted on the mounting wheel bracket, the mounting wheel is mounted on the upper end of the transmission shaft, and the transmission gear is mounted on the lower end of the transmission shaft. The transmission gear is connected to the power assembly through a gear transmission assembly.

[0047] like Figure 5 ,6 7. Several cutting punches 5 for punching holes for the hose are equally spaced in the circumferential direction of the mounting wheel. The mounting wheel rotates with the transmission shaft to punch holes in the hose between the two mounting wheels. A movable waste ejector 16 is installed in the center of the cutting punch. The mounting wheel bracket is fixedly connected to a waste ejector cam 18 and a waste ejector reset block 17. The waste ejector cam is arranged on the inner side of the mounting wheel. When the mounting wheel rotates, the waste ejector passes through the highest point of the waste ejector cam and is ejected from the cutting punch, and the waste inside the cutting punch is ejected. The waste ejector reset block is arranged on the outer side of the mounting wheel and is an arc block. When the mounting wheel rotates, the ejected waste ejector passes through the waste ejector reset block and is pressed back into the cutting punch.

[0048] The power assembly consists of a servo motor 1, a servo motor bracket 21 and a gear transmission assembly. The servo motor is installed on the frame assembly through the servo motor bracket, and the output shaft of the servo motor is connected to the punching hole assembly through the gear transmission assembly.

[0049] During the specific operation, the nylon core rod 7 is manually inserted into the rubber and plastic tube 6, and the distance of the nylon core rod 7 is determined according to the number of holes to be opened on the rubber and plastic tube 6 to ensure that the cutting edge of the cutting punch 5 is on the surface of the nylon core rod 7 when the cutting is completed.

[0050] The locking wrench 8 is rotated outward to the open position, the lowest point of the left and right locking cams 4 / 15 contacts the right mounting wheel bracket 24, and the pair of left and right punching hole assemblies 22 / 9 are rotated outward to the open point, so that the distance between the pair of facing cutting punches 5 is the largest, and the rubber and plastic tube 6 inserted into the nylon mandrel 7 is pushed into the pair of front positioning pulleys 32, and continues to move forward into the pair of middle positioning pulleys 26. After determining the distance between the starting hole and the top of the rubber tube, the locking wrench 8 is turned to the locking position, and the locking wrench 8 locks the left locking cam 4 and the right locking cam 1 through the connecting rod 14. 5 are rotated toward each other to the locking position of the highest point. At this time, the highest points of the left locking cam 4 and the right locking cam 15 are respectively in contact with the left mounting wheel bracket 33 and the right mounting wheel bracket 24 at the same time, and the left punching hole assembly 22 and the right punching hole assembly 9 are rotated inward to the locking point, so that the blades of the cutting punch 5 face each other and cut into the wall of the rubber and plastic tube until the surface of the nylon core rod 7, and a circular hole is punched out of the rubber and plastic tube 6. At the same time, the waste material of the circular hole remains in the inner hole of the cutting punch 5, and the waste material ejector pin 16 in the inner hole of the cutting punch 5 is pushed into the hole by the waste material, and the first group of holes is processed.

[0051] Subsequently, the servo motor 1 is started. Driven by a set of transmission gears 12, the left mounting wheel 13 and the right mounting wheel 10 rotate synchronously towards each other. The cutting punches 5 mounted on them enter the rubber and plastic tube 6 pair by pair. Since the previous pair of cutting punches 5 have not completely left the rubber and plastic tube 6 after punching, and the next pair of cutting punches 5 have already started to enter, the left mounting wheel 13 and the right mounting wheel 10 can synchronously move the rubber and plastic tube 6 when rotating, so as to complete the continuous punching of the rubber and plastic tube 6.

[0052] The left mounting wheel 13 and the right mounting wheel 10 rotate continuously during the processing. There is waste in the inner holes of the cutting punches 5 that have completed the processing, and it needs to be removed before the next punching process. When the cutting punch 5 with waste rotates 90° to the highest point of the waste ejection cam 18, the waste ejector pin 16 inside the cutting punch 5 is pushed outwards by the waste ejection cam 18, and at the same time, the waste is pushed away from the cutting punch 5. To ensure that the waste completely leaves the cutting punch 5, the top of the waste ejector pin 16 will be outside the cutting edge of the cutting punch 5. Before the next punching process, the waste ejector pin 16 needs to be reset to be flush with the cutting edge of the cutting punch 5 so as not to interfere with the displacement punching. When the cutting punch 5 rotates 270° to the position of the waste ejector pin reset block 17, the inclined surface on the waste ejector pin reset block 17 pushes the waste ejector pin 16 back into the inside of the cutting punch 5, and the cutting punch 5 rotates 360° to enter the punching process of the next cycle.

[0053] A set of cutting punches are equally divided according to the hole pitch of the hose processing on the mounting wheel, so continuous automatic processing can be realized. As the processing progresses, the rubber and plastic tube 6 moves forward continuously. The processed part enters a set of rear positioning pulleys 11. Since the number of row holes of different products varies, the programmable controller of the servo motor 1 can be used to preset the program to complete the number of punching holes of the rubber and plastic tube 6. After the number of punching row holes is completed, the control system sends a signal to externally rotate the locking wrench 8 to the open position, and the cutting punch 5 also leaves the rubber and plastic tube 6 accordingly. The rubber and plastic tube 6 is drawn out from the positioning pulley, and the nylon core rod 7 in the rubber and plastic tube 6 is taken out. The punching of the rubber and plastic tube 6 is completed. The programmable controller and the servo motor are well-known and commonly used technologies, and will not be described in detail here.

[0054] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. Those skilled in the art can obviously make various modifications to these embodiments easily and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A continuous punching device for rubber and plastic hoses, characterized in that, It includes a rack assembly for carrying and installing various components, and the following components arranged on the rack assembly: Hose positioning pulley assembly, used for guiding and positioning when drilling holes in the hose; Punching hole assembly, used for punching out symmetrical and continuous rows of holes for the hose, provided with two groups, symmetrically arranged on both sides of the hose positioning pulley assembly; A power assembly, which is in driving connection with the punching hole assembly and provides power therefor; A locking assembly, used to control the punching hole assembly to lock or release; The locking assembly is composed of a pair of locking cams that can rotate toward each other, wherein one locking cam is fixedly connected to a locking wrench, the two locking cams are connected by a connecting rod, and the locking cam abuts against the punching hole assembly; The punching hole assembly comprises a mounting wheel bracket, a transmission shaft, a mounting wheel and a transmission gear, wherein the transmission shaft is vertically mounted on the mounting wheel bracket, the mounting wheel is mounted on the upper end of the transmission shaft, the transmission gear is mounted on the lower end of the transmission shaft, and the transmission gear is transmission-connected to the power assembly through a gear transmission assembly; A plurality of cutting punches for punching holes for the hose are equally installed in the circumferential direction of the mounting wheel, and the mounting wheel rotates with the transmission shaft to punch holes in the hose between the two mounting wheels; A movable waste ejector pin is installed at the center of the cutting punch, and the mounting wheel bracket is fixedly connected to a waste ejector cam and a waste ejector pin reset block; The waste ejection cam is arranged on the inner side of the mounting wheel. When the mounting wheel rotates, the waste ejector pin is ejected out of the cutting punch when it passes the highest point of the waste ejection cam, and the waste inside the cutting punch is ejected. The waste ejector pin reset block is arranged on the outer side of the mounting wheel and is an arc-shaped block. When the mounting wheel rotates, the ejected waste ejector pin is pressed back into the cutting punch when passing through the waste ejector pin reset block.

2. The continuous punching device for rubber and plastic hoses according to claim 1, characterized in that, The hose positioning pulley assembly is composed of multiple groups of pulleys arranged in pairs; The spacing between each pair of pulleys matches the outer diameter of the hose and is just enough to pass the hose; The multiple groups of paired pulleys restrict the freedom of the rubber hose except for the axial movement of the rubber hose.

3. The continuous punching device for rubber and plastic hoses according to claim 2, characterized in that, The hose positioning pulley assembly is provided with three groups, which are the front positioning pulley, the middle positioning pulley and the rear positioning pulley in the moving direction of the hose; The front positioning pulley and the rear positioning pulley are installed horizontally through the pulley bracket, and the middle positioning pulley is installed vertically up and down through the pulley bracket.

4. The continuous punching device for rubber and plastic hoses according to claim 1, characterized in that, The punching hole assembly is hinged on the frame assembly and can swing at a certain angle.

5. A continuous punching device for rubber and plastic hoses according to claim 1, wherein, The power assembly consists of a servo motor, a servo motor bracket and a gear transmission assembly. The servo motor is installed on the frame assembly through the servo motor bracket, and the output shaft of the servo motor is transmission-connected to the punching hole assembly through the gear transmission assembly.

6. The continuous punching device for rubber and plastic hoses according to claim 1, wherein, The rack assembly is composed of a rack bottom plate and a rack, and the rack is vertically installed on the side of the rack bottom plate. The hose positioning pulley assembly and the locking assembly are mounted on the bottom plate of the frame, and the punching hole assembly and the power assembly are mounted on the frame.

7. The continuous punching device for rubber and plastic hoses according to claim 1, wherein, When punching holes in the rubber hose, a nylon core rod is inserted into the hose and then passes through the punching device.

Images