Silencer sound guide tube production equipment and process

Abstract

The invention relates to the technical field of silencer sound guide tube production, and discloses silencer sound guide tube production equipment and a silencer sound guide tube production process, the silencer sound guide tube production equipment comprises an operation table, and a laser cutting machine is mounted on the operation table; a supporting assembly is arranged on the operation table. A stepping assembly is arranged on the operation table and comprises two clamping plates. A collecting assembly is arranged on the operation table. And a grinding part is arranged on the collecting assembly. Through cooperation of the laser cutting machine and the stepping assembly, after the laser cutting machine conducts punching operation every time, the two clamping plates can drive the steel belt to move leftwards by a certain distance in the process of conducting left-right reciprocating motion, then the laser cutting machine conducts punching operation of the next time, automatic stepping punching is achieved, and the punching efficiency is improved. Compared with manual adjustment of the position of the steel belt, the precision of hole position control is improved, the automation degree is high, manual operation is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of silencer sound guide tube manufacturing technology, specifically to a silencer sound guide tube manufacturing equipment and process. Background Technology

[0002] The automotive air conditioning muffler is a key component of the automotive air conditioning system, and its quality directly affects the noise reduction effect. The muffler guide tube is the core component of the automotive air conditioning muffler. The muffler guide tube has circular holes, and the diameter and spacing of these holes have a direct and critical impact on the noise reduction effect. By designing the relevant parameters of the diameter and spacing of the circular holes in the muffler guide tube, the interaction between sound waves and noise reduction materials can be optimized, and the airflow damping characteristics can be adjusted to efficiently attenuate noise of different frequencies. In the production process, the muffler guide tube is usually made of steel strip. First, holes are pre-drilled in the steel strip, then the steel strip is rolled and cut to obtain a blank, which is then processed and shaped into the muffler guide tube.

[0003] However, the existing technology has the following problems:

[0004] Most existing steel strip punching methods use drilling. During drilling, the position of the steel strip usually needs to be adjusted manually to punch holes in rows. However, manual adjustment is inefficient and has limited accuracy, which may result in hole misalignment and affect product quality. Summary of the Invention

[0005] The purpose of this invention is to provide a production equipment and process for a silencer sound guide tube in order to solve the above-mentioned problems and overcome the defects of the prior art, as detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a silencer sound guide tube production equipment, comprising: an operating table on which a laser cutting machine is mounted; a support assembly on the operating table for supporting and positioning a steel strip; a stepping assembly on the operating table, the stepping assembly including two clamping plates, which clamp the steel strip and drive it to move to the left when moving to the left; a collection assembly on the operating table including a collection box for collecting waste generated during the punching of the steel strip; and a grinding section on the collection assembly, the grinding section including two housings, with a sanding belt installed inside each housing for grinding the round holes on the steel strip to remove burrs.

[0008] Preferably, the support assembly includes multiple first frames, which are installed side by side on the operating table. Support rollers are rotatably mounted on the first frames, and the multiple support rollers are used to support the steel strip.

[0009] Preferably, the support assembly also includes two secondary frames, which are mounted on the operating table. Two nut blocks are slidably connected to the secondary frames, and positioning rollers are rotatably connected to the top of the nut blocks. A bidirectional lead screw is rotatably connected through the secondary frames, and the bidirectional lead screw has two threaded grooves in opposite directions. The two nut blocks are respectively threaded to the two threaded grooves of the bidirectional lead screw. When the bidirectional lead screw rotates, it can use the two threaded grooves to drive the two nut blocks to move closer or further apart. The two positioning rollers on the secondary frames center the steel strip by clamping the two edges of the steel strip.

[0010] Preferably, the stepping assembly further includes a hydraulic cylinder and a movable frame. The movable frame is slidably mounted on the operating table, and the hydraulic cylinder is mounted on the operating table. The hydraulic cylinder has a telescopic section, which is connected to the movable frame. Two mounting seats are connected to the movable frame. The two mounting seats are mirror-shaped, and a pair of support rods are hinged to the side of each mounting seat closest to each other. Two clamping plates are hinged to the ends of the two pairs of support rods away from the mounting seats. The ends of the support rods away from the mounting seats are tilted to the left. A first spring is connected to the clamping plate, and the ends of the two first springs away from the clamping plates are connected to the two mounting seats respectively.

[0011] Preferably, the collection assembly further includes a third frame, which is mounted on an operating table and has two crossbars installed on it. The collection box is slidably connected between the two crossbars.

[0012] Preferably, the bottom of the collection box is connected to a groove block, the telescopic section of the hydraulic cylinder is connected to a connecting rod, the connecting rod is connected to a sliding shaft, the groove block is provided with a wavy groove, the sliding shaft is slidably connected to the wavy groove of the groove block, and the sliding shaft can drive the collection box to shake when it moves by utilizing the wavy groove.

[0013] Preferably, a driver is installed on the housing, which is connected to the sanding belt drive. The driver is used to drive the sanding belt to rotate. Both housings are slidably connected to the No. 3 frame. The two housings are mirror images of each other. The two sanding belts grind the top and bottom surfaces of the steel belt, respectively. Connecting rods are hinged to both ends of the housing. Two sliders are slidably connected to the No. 3 frame. The two connecting rods located on the front side of the No. 3 frame and the two connecting rods located on the rear side of the No. 3 frame are each set as a group. The two groups of connecting rods are hinged to the two sliders. A connecting frame is connected between the two sliders. A second spring is connected between the connecting frame and the connecting rod. When the two sliders move to the right, they can drive the two housings to move closer to each other through the two groups of connecting rods.

[0014] Preferably, the third frame is equipped with a cleaning section, which includes two supports, both of which are mounted on the third frame. A smooth rod is slidably connected between the two supports, and a connecting block is connected to the outer wall of the smooth rod. A scraper is connected to the connecting block. The scraper is made of flexible material and is V-shaped. The scraper can scrape the waste material on the surface of the steel strip into the collection box when the steel strip moves.

[0015] Preferably, the cleaning unit further includes two pry bars, which are rotatably mounted on two supports. Two pins are connected to the connecting frame. Each pry bar has a groove at both ends. The two pins are slidably connected to one of the grooves of the pry bar. The two ends of the smooth rod are slidably connected to the other groove of the pry bar. When the pry bar rotates, it can drive the connecting block to move horizontally through the smooth rod.

[0016] A manufacturing process for a muffler sound guide tube includes the following steps:

[0017] Step 1: Place the steel strip on the support assembly. The stepping assembly drives the steel strip to move to the left intermittently. The laser cutting machine and the stepping assembly work together to punch holes in the steel strip. The grinding part grinds the round holes to remove burrs.

[0018] Step 2: The perforated steel strip is fed into a heating box for preheating, and then the steel strip is pressed into a round tube using a coiling press.

[0019] Step 3: Feed the round tube into the cutting device to cut it into short tubes that meet the length requirements;

[0020] Step 4: The short tube is fed into the feeding mechanism of the spinning lathe. The feeding mechanism realizes automatic feeding of single tubes. The spinning lathe spins the short tube to form a cylindrical tube with one end sealed.

[0021] Step 5: Place the cylindrical tube into the wire drawing die and use a hydraulic punch to cut the wire drawing die to form equidistant ring lines at the end of the cylindrical tube away from the sealing end;

[0022] Step Six: Place the cylindrical tube into the hydraulic punch press and clamp it to perform a necking process, specifically necking the end furthest from the seal.

[0023] Step 7: Place the sound guide tube into an ultrasonic cleaning device for cleaning, and then place it into a drying device for drying, finally forming the silencer sound guide tube.

[0024] The beneficial effects are:

[0025] 1. This silencer sound guide tube production equipment, through the cooperation of a laser cutting machine and a stepping component, enables the two clamping plates to move the steel strip a certain distance to the left during each drilling operation of the laser cutting machine, and then the laser cutting machine performs the next drilling operation, realizing automated stepping drilling. Compared with manual adjustment of the steel strip position, it improves the accuracy of hole position control, has a high degree of automation, reduces manual operation, and improves work efficiency.

[0026] 2. This silencer sound guide tube production equipment, through the setting of the collection component, allows the waste generated during the punching of the steel belt to fall directly into the collection box for collection, facilitating regular centralized cleaning, maintaining the cleanliness of the operating table, and reducing the operation time spent by workers on cleaning. Through the setting of the cleaning section, impurities on the top surface of the sand belt are intercepted by the scraper. As the steel belt moves to the left, the scraper can simultaneously move to the right, thereby increasing the relative speed between the scraper and the steel belt, and thus increasing the speed at which impurities at the bottom of the scraper move to both sides. This causes the impurities to move forward and backward along the two inclined sides of the V-shaped scraper, and finally fall from the front and rear sides of the steel belt into the collection box below.

[0027] 3. The silencer sound guide tube production equipment, through the setting of the grinding section, allows the steel strip to complete one punching and step to the left. Then, the two sanding belts contact the top and bottom surfaces of the steel strip respectively, thereby grinding the top and bottom edges of the round holes on the steel strip to remove burrs and improve surface quality. During the process of the steel strip stepping to the left, the two machine housings can drive the sanding belts to detach from the steel strip to avoid affecting the stepping of the steel strip. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the support component structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the positioning roller structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the stepper component structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the clamping plate structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the collection component structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the collection box structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the slot block structure of the present invention;

[0037] Figure 9 This is a schematic diagram of the grinding part structure of the present invention;

[0038] Figure 10 This is a schematic diagram of the linkage structure of the present invention;

[0039] Figure 11 This is a schematic diagram of the cleaning section structure of the present invention;

[0040] Figure 12 This is a schematic diagram of the pry bar structure of the present invention.

[0041] The annotations in the attached figures are explained as follows:

[0042] 1. Operating table; 2. Laser cutting machine; 3. Support assembly; 31. Frame 1; 32. Support roller; 33. Frame 2; 34. Nut block; 35. Positioning roller; 36. Bidirectional lead screw; 4. Stepping assembly; 41. Hydraulic cylinder; 42. Movable frame; 43. Mounting base; 44. Support rod; 45. Clamping plate; 46. First spring; 5. Collection assembly; 51. Frame 3; 52. Crossbar; 53. Collection box; 54. Connecting rod; 55. Sliding shaft; 56. Groove block; 6. Grinding section; 61. Machine housing; 62. Sanding belt; 63. Driver; 64. Connecting rod; 65. Slider; 66. Connecting frame; 67. Second spring; 7. Cleaning section; 71. Support; 72. Polishing rod; 73. Connecting block; 74. Scraper; 75. Pry bar; 76. Pin. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0044] Example 1

[0045] Existing methods for punching holes in steel strips mostly involve drilling. During drilling, the position of the steel strip usually needs to be adjusted manually to punch holes in rows. However, manual adjustment is inefficient and has limited accuracy, and there may be hole misalignment. This embodiment is invented to solve the above problems.

[0046] Please see Figure 1 - Figure 5 The following text will all be in the format of " Figure 1 Based on the front, back, left, right, up, and down directions, a silencer sound guide tube production equipment includes: an operating table 1, on which a laser cutting machine 2 is installed. The laser cutting machine 2 consists of a moving module and a laser cutting head. The moving module can drive the laser cutting head to move in three axes. The drilling efficiency of the laser cutting head is higher than that of the drilling process. The laser cutting machine 2 is existing technology, and its specific structure and working principle will not be described in detail.

[0047] Furthermore, a support assembly 3 is provided on the operating table 1 for supporting and positioning the steel strip; the support assembly 3 includes multiple first frames 31, which are installed side by side on the operating table 1, and support rollers 32 are rotatably mounted on the first frames 31. The multiple support rollers 32 are used to support the steel strip; when the steel strip is placed on the multiple support rollers 32, the support rollers 32 can rotate as the steel strip above them moves, and the multiple support rollers 32 play the role of supporting the steel strip.

[0048] It is worth noting that the support assembly 3 also includes two secondary frames 33, which are mounted on the operating table 1. Multiple primary frames 31 are located between the two secondary frames 33. Two nut blocks 34 are slidably connected to the secondary frames 33. Each secondary frame 33 has a groove perpendicular to the direction of steel strip movement. The nut blocks 34 are slidably connected to the secondary frames 33 through this groove. The sliding direction of the nut blocks 34 is perpendicular to the direction of steel strip movement. A positioning roller 35 is rotatably connected to the top of each nut block 34. A bidirectional lead screw 36 is rotatably connected through the secondary frames 33. The bidirectional lead screw 36 has two threaded grooves in opposite directions. The two nut blocks 34 are respectively connected to the bidirectional lead screw 36. The two threaded grooves are connected by threads. When the double-acting screw 36 rotates, it can use the two threaded grooves to drive the two nut blocks 34 to move closer or further apart. The two positioning rollers 35 on the second frame 33 center the steel strip by clamping the two sides of the steel strip. After the steel strip is placed on the support roller 32, the two double-acting screws 36 are rotated. When the double-acting screw 36 rotates forward, it can drive the two nut blocks 34 to move closer together, so that the two positioning rollers 35 clamp the front and rear sides of the steel strip. When the four positioning rollers 35 above the two second frames 33 clamp the steel strip at the same time, they can center the steel strip and prevent the steel strip from shifting during movement.

[0049] It is worth mentioning that the operating table 1 is equipped with a stepping component 4, which includes two clamping plates 45. When the two clamping plates 45 move to the left, they can clamp the steel strip and drive the steel strip to move to the left. The stepping component 4 also includes a hydraulic cylinder 41 and a movable frame 42. The movable frame 42 is slidably mounted on the operating table 1, and the hydraulic cylinder 41 is mounted on the operating table 1. The hydraulic cylinder 41 is provided with a telescopic section, which is connected to the movable frame 42. Two mounting seats 43 are connected to the movable frame 42. The two mounting seats 43 are mirror images of each other. A pair of support rods 44 are hinged to the side of the two mounting seats 43 that is close to each other. The two clamping plates 45 are respectively hinged to the ends of the two pairs of support rods 44 that are away from the mounting seats 43. The ends of the support rods 44 that are away from the mounting seats 43 are tilted to the left. A first spring 46 is connected to the clamping plate 45. The ends of the two first springs 46 that are away from the clamping plate 45 are respectively fixedly connected to the two mounting seats 43.When placing the steel strip, one end of the steel strip is passed between the two clamping plates 45. The laser cutting machine 2 is located on the left side of the stepping assembly 4. When the hydraulic cylinder 41 extends, the telescopic section of the hydraulic cylinder 41 drives the movable frame 42 to move to the left. When the hydraulic cylinder 41 retracts, the telescopic section of the hydraulic cylinder 41 drives the movable frame 42 to move to the right. One extension and retraction of the hydraulic cylinder 41, that is, one leftward and rightward movement and reset of the movable frame 42, constitutes one complete stepping action. When the movable frame 42 moves to the left, it drives the two mounting seats 43 to move to the left. The first spring 46 on the mounting seat 43 always clamps the steel strip. The plate 45 applies elastic force, ensuring that the two clamping plates 45 always remain in contact with the top and bottom surfaces of the steel plate. The two clamping plates 45 clamp the steel strip in the middle, and the contact surfaces between the clamping plates 45 and the steel strip are provided with multiple ribs to increase unidirectional friction. This results in greater friction when the clamping plates 45 move to the left on the steel strip surface, and less friction when they move to the right. When the mounting base 43 moves left and right, a pair of support rods 44 drive the clamping plates 45 to move synchronously. Because the end of the support rod 44 away from the mounting base 43 is tilted to the left, the mounting base... When clamping plates 43 and 45 move to the left, support rods 44 apply a supporting force to the clamping plates 45. At this time, support rods 44 apply a force towards the steel strip, so that the two clamping plates 45 can firmly clamp the steel strip and drive the steel strip to move to the left when moving to the left. When the two clamping plates 45 move to the right, the pair of support rods 44 on the clamping plates 45 do not generate a supporting force. The support rods 44 will swing slightly to the left when the clamping plates 45 move to the right, so that the clamping plates 45 can slide to the right along the surface of the steel strip. However, due to the weight of the steel strip itself, although the two clamping plates 45 still maintain contact with the steel strip when moving to the right, they are still able to move to the right. However, it will not cause the steel strip to move to the right. This achieves the technical effect that the two clamping plates 45 can move the steel strip a certain distance to the left during each left-right reciprocating movement. Therefore, after each drilling operation, the stepping component 4 moves the steel strip a certain distance to the left before the laser cutting machine 2 performs the next drilling operation, realizing automated stepping drilling. The stepping distance is equal to the hole spacing. The distance the clamping plates 45 move to the left is controlled by the extension distance of the hydraulic cylinder 41. Therefore, the drilling spacing can be adjusted by controlling the output parameters of the hydraulic cylinder 41.

[0050] Example 2

[0051] Based on the above embodiment, waste material is generated when punching holes in the steel strip, and the waste material falls on the operating table 1, which requires frequent cleaning by the staff, which is inconvenient. This embodiment is invented to solve the above problem.

[0052] Please see Figure 1 , Figure 6 - Figure 8The operating table 1 is equipped with a collection component 5, which includes a collection box 53 for collecting waste generated during steel strip drilling. The collection component 5 also includes a third frame 51, which is installed on the operating table 1. Two crossbars 52 are installed on the third frame 51, and the collection box 53 is slidably connected between the two crossbars 52. The collection box 53 is located below the drilling area of ​​the laser cutting machine 2 on the steel strip. Therefore, during drilling, the waste generated will fall directly into the collection box 53 for collection, which is convenient for regular centralized cleaning, keeps the operating table 1 clean, and reduces the operation time of the staff for cleaning.

[0053] In addition, a groove block 56 is connected to the bottom of the collection box 53, and a connecting rod 54 is connected to the telescopic section of the hydraulic cylinder 41. A sliding shaft 55 is connected to the connecting rod 54. A wavy groove is provided on the groove block 56, and the sliding shaft 55 is slidably connected to the wavy groove of the groove block 56. When the sliding shaft 55 moves, it can use the wavy groove to drive the collection box 53 to vibrate. When the hydraulic cylinder 41 extends and retracts, it will drive the connecting rod 54 to move synchronously to the left or right through the telescopic section. When the connecting rod 54 moves, it drives the sliding shaft 55 to move synchronously. When the sliding shaft 55 moves, it moves along the groove. The wavy chute of the trough 56 slides, so when the sliding shaft 55 moves in a straight line, it will continuously exert a reaction force on the inner wall of the wavy chute. The collection box 53 and the chute are limited to moving back and forth. Therefore, when the sliding shaft 55 moves left and right, it can drive the collection box 53 to move back and forth in a small amplitude through the trough 56, achieving the technical effect of shaking the collection box 53. The shaking of the collection box 53 can promote the uniform accumulation of waste inside, and avoid the situation where the waste inside the collection box 53 is concentrated and piled up too high.

[0054] Example 3

[0055] Based on the above embodiments, after the steel strip is punched, burrs may appear on the edge of the round hole, which will affect the appearance quality of the product. This embodiment is invented to solve the above problem.

[0056] Please see Figure 1 , Figure 6 , Figure 9 , Figure 10The collecting component 5 is equipped with a grinding section 6, which includes two housings 61. Sanding belts 62 are installed inside the housings 61. The sanding belts 62 are used to grind the round holes on the steel strip to remove burrs. A driver 63 is installed on the housing 61, and the driver 63 is connected to the sanding belts 62 for driving the sanding belts 62 to rotate. Both housings 61 are slidably connected to the third frame 51. The two housings 61 are mirror images of each other. The two sanding belts 62 grind the top and bottom surfaces of the steel strip respectively. Connecting rods 64 are hinged to both ends of the housings 61. Two sliders 65 are slidably connected to the third frame 51. The two connecting rods 64 located on the front side of the third frame 51 and the connecting rods 65 located on the back side of the third frame 51 are also connected to the third frame 51. The two connecting rods 64 on the rear side of the third frame 51 are each set as a group. The two sets of connecting rods 64 are hinged to the two sliders 65 respectively. A connecting frame 66 is connected between the two sliders 65. A second spring 67 is connected between the connecting frame 66 and the connecting rod 54. When the two sliders 65 move to the right, they can drive the two machine housings 61 to move closer to each other through the two sets of connecting rods 64. After the driver 63 is started, it can drive the sanding belts 62 to rotate, so that the two sanding belts 62 can perform grinding operations. The connecting frame 66 and the movable frame 42 move synchronously. When the connecting frame 66 moves to the right, it is driven to move to the right through the second spring 67. The second spring 67 is used for transmission. The extension and retraction parameters are adjusted by the hydraulic cylinder 41 to match the movement of the machine housings. With different hole spacings, the second spring 67 can extend and retract accordingly, thus maintaining the flexible connection between the connecting rod 54 and the connecting frame 66, ensuring that the connecting rod 54 can always maintain effective transmission with the connecting frame 66. The connecting frame 66 drives the two sliders 65 to move to the right. When the sliders 65 move to the right, they can drive the two housings 61 to move closer to each other through the two connecting rods 64 connected to them. Therefore, the two housings 61 can simultaneously approach the steel strip, so that the two sanding belts 62 contact the top and bottom surfaces of the steel strip respectively, thereby grinding the top and bottom edges of the round holes on the steel strip to remove burrs. After the laser cutting machine 2 performs one cut, the two clamping plates 45 move to the left and right. The steel belt is moved, and at this time, the connecting rod 54 drives the connecting frame 66 to move to the left through the second spring 67. The connecting frame 66 drives the two sliders 65 to move to the left. When the sliders 65 move to the left, they can use the two connecting rods 64 to drive the two housings 61 to move away from each other, so that the sanding belts 62 on the two housings 61 are separated from the steel belt. Therefore, during the leftward stepping of the steel belt, the two sanding belts 62 do not contact the steel belt to avoid affecting the stepping of the steel belt. When the steel belt is completed, the two clamping plates 45 move to the right. At this time, the two housings 61 move closer to the steel belt again until the two sanding belts 62 contact the steel belt. Then the laser cutting machine 2 performs the next drilling operation, and the two sanding belts 62 grind the newly drilled round hole.

[0057] Example 4

[0058] Based on the above embodiment, since the steel strip may have impurities such as slag attached to its surface after the punching is completed, and the steel strip moves to the left, the impurities such as slag will enter below the sanding belt 62 and come into contact with it, thereby aggravating the wear of the sanding belt 62. This embodiment is invented to solve the above problem.

[0059] Please see Figure 6 , Figure 11 , Figure 12 The third frame 51 is equipped with a cleaning section 7, which includes two supports 71. Both supports 71 are installed on the third frame 51, and a smooth rod 72 is slidably connected between the two supports 71. A connecting block 73 is connected to the outer wall of the smooth rod 72, and a scraper 74 is connected to the connecting block 73. The scraper 74 is made of flexible material and is V-shaped. The scraper 74 can scrape the waste material on the surface of the steel belt into the collection box 53 when the steel belt moves. The scraper 74 is located between the housing 61 and the drilling surface. When the sanding belt 62 steps to the left after completing one drilling, the bottom of the scraper 74 always keeps in contact with the top surface of the sanding belt 62, so that the impurities on the top surface of the sanding belt 62 will be intercepted by the scraper 74. As the sanding belt 62 continues to move, the sanding belt 62 will drive the impurities intercepted at the bottom of the scraper 74 to move to the left, so that the impurities move forward and backward along the two inclined sides of the V-shaped scraper 74, and finally fall from the front and rear sides of the steel belt into the collection box 53 below.

[0060] In addition, the cleaning unit 7 includes two pry bars 75, which are rotatably mounted on two supports 71. Two pins 76 are connected to the connecting frame 66. Slide grooves are opened at both ends of the pry bars 75. The two pins 76 are slidably connected to one of the slide grooves of the pry bars 75. The two ends of the smooth rod 72 are slidably connected to the other slide groove of the pry bars 75. When the pry bars 75 rotate, they can drive the connecting block 73 to move horizontally through the smooth rod 72. When the steel belt moves to the left, that is, when the connecting frame 66 moves to the left, the connecting frame 66 drives the bottom ends of the two pry bars 75 to move to the left through the two pins 76. The pry bars 75 use the lever principle to drive the smooth rod 72 to move to the right through their top ends. When the two smooth rods 72 move, they drive the scraper 74 to move synchronously through the connecting block 73. Therefore, when the steel belt moves to the left, the scraper 74 can move to the right at the same time, thereby increasing the relative speed between the scraper 74 and the steel belt, thereby increasing the speed at which the impurities at the bottom of the scraper 74 move to both sides, and thus increasing the efficiency of the impurities falling into the collection box 53.

[0061] Example 5

[0062] A process for manufacturing a muffler sound guide tube, using a muffler sound guide tube manufacturing equipment described in the above embodiments, further includes the following steps:

[0063] Step 1: Place the steel strip on the support assembly 3, and drive the steel strip to move to the left intermittently through the stepping assembly 4. The laser cutting machine 2 and the stepping assembly 4 work together to punch holes in the steel strip. The grinding part 6 grinds the round holes to eliminate burrs.

[0064] Step 2: The perforated steel strip is fed into a heating box for preheating, and then the steel strip is pressed into a round tube using a coiling press.

[0065] Step 3: Feed the round tube into the cutting device to cut it into short tubes that meet the length requirements;

[0066] Step 4: The short tube is fed into the feeding mechanism of the spinning lathe. The feeding mechanism realizes automatic feeding of single tubes. The spinning lathe spins the short tube to form a cylindrical tube with one end sealed.

[0067] Step 5: Place the cylindrical tube into the wire drawing die and use a hydraulic punch to cut the wire drawing die to form equidistant ring lines at the end of the cylindrical tube away from the sealing end;

[0068] Step Six: Place the cylindrical tube into the hydraulic punch press and clamp it to perform a necking process, specifically necking the end furthest from the seal.

[0069] Step 7: Place the sound guide tube into an ultrasonic cleaning device for cleaning, and then place it into a drying device for drying, finally forming the silencer sound guide tube.

[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An apparatus for producing a sound attenuator duct, characterized by, The utility model relates to a laser cutting machine, and belongs to the field of laser cutting machine. It comprises an operation table (1) and a laser cutting machine (2) installed on the operation table (1). The operation table (1) is provided with a supporting assembly (3) for supporting and positioning the steel strip. The operation table (1) is provided with a stepping assembly (4), which comprises two clamping plates (45). The operation table (1) is provided with a collecting assembly (5), which comprises a collecting box (53) for collecting the waste generated when the steel strip is punched. The collecting assembly (5) is provided with a polishing part (6), which comprises two machine housings (61).

2. The device for producing a sound guide pipe of a muffler according to claim 1, characterized by: The supporting assembly (3) comprises a plurality of first racks (31) installed side by side on the operation table (1).

3. A silencer duct production apparatus according to claim 2, characterized in that: The supporting assembly (3) further comprises two second racks (33) installed on the operation table (1).

4. The device for producing a sound guide pipe of a muffler according to claim 1, characterized by: The stepping assembly (4) further comprises a hydraulic cylinder (41) and a movable rack (42). The movable rack (42) is slidably installed on the operation table (1). The hydraulic cylinder (41) is installed on the operation table (1) and is provided with an extension section. The extension section of the hydraulic cylinder (41) is connected with the movable rack (42). The movable rack (42) is provided with two mounting seats (43) arranged in mirror image. Each mounting seat (43) is hingedly connected with a pair of support rods (44) on the side away from the other mounting seat (43). The clamping plates (45) are hingedly connected to the ends of the two pairs of support rods (44) away from the mounting seats (43). The support rods (44) are inclined to the left at the ends away from the mounting seats (43). The clamping plates (45) are provided with first springs (46) connected to the mounting seats (43) at the ends away from the clamping plates (45).

5. A silencer duct production apparatus according to claim 4, characterized in that: The collecting assembly (5) further comprises a No. 3 frame (51) installed on the operating table (1), two cross bars (52) are installed on the No. 3 frame (51), and the collecting box (53) is slidingly connected between the two cross bars (52).

6. A silencer duct production apparatus according to claim 5, characterized in that: A groove block (56) is connected to the bottom of the collecting box (53), a connecting rod (54) is connected to the telescopic section of the hydraulic cylinder (41), a sliding shaft (55) is connected to the connecting rod (54), a wave-shaped sliding groove is formed in the groove block (56), the sliding shaft (55) is slidingly connected with the wave-shaped sliding groove of the groove block (56), and the sliding shaft (55) can drive the collecting box (53) to shake when moving by using the wave-shaped sliding groove.

7. A silencer duct production apparatus according to claim 6, characterized in that: The drive (63) is drivingly connected with the abrasive belt (62), and the drive (63) is used for driving the abrasive belt (62) to rotate. The two machine housings (61) are slidingly connected with the No. 3 frame (51) and are mirror-imaged. The two abrasive belts (62) are used for grinding the top surface and the bottom surface of the steel belt respectively. The two ends of the machine housing (61) are hingedly connected with the connecting rods (64). The No. 3 frame (51) is slidingly connected with the two sliding blocks (65). The two connecting rods (64) on the front side of the No. 3 frame (51) and the two connecting rods (64) on the rear side of the No. 3 frame (51) are respectively arranged as a group. The two groups of connecting rods (64) are respectively hingedly connected with the two sliding blocks (65). The connecting frame (66) is connected between the two sliding blocks (65). The second spring (67) is connected between the connecting frame (66) and the connecting rod (54). When the two sliding blocks (65) move rightward, the two machine housings (61) can be driven to move close to each other by the two groups of connecting rods (64).

8. A silencer duct production apparatus according to claim 7, characterized in that: The No. 3 frame (51) is provided with a cleaning part (7). The cleaning part (7) comprises two supports (71) which are installed on the No. 3 frame (51). A light rod (72) is slidingly connected between the two supports (71). The light rod (72) is connected with the connecting block (73). The connecting block (73) is connected with the scraper (74). The scraper (74) is made of flexible material and is arranged in a V shape. The scraper (74) can scrape the waste on the surface of the steel belt into the collecting box (53) when the steel belt moves.

9. A silencer duct production apparatus according to claim 8, characterized in that: The cleaning part (7) further comprises two pry rods (75) which are rotatably installed on the two supports (71). The connecting frame (66) is connected with two pin shafts (76). The two ends of the pry rod (75) are provided with sliding grooves. The two pin shafts (76) are slidingly connected with one of the sliding grooves of the pry rod (75). The two ends of the light rod (72) are slidingly connected with the other sliding grooves of the pry rod (75). When the pry rod (75) rotates, the connecting block (73) can be driven to move horizontally by the light rod (72).

10. A process for producing a sound attenuator duct, characterized by: The silencer sound guide pipe production equipment of any one of claims 1-9 further comprises the following steps: Step one: the steel belt is placed on the support assembly (3), the steel belt is intermittently moved left by the stepping assembly (4), the laser cutting machine (2) cooperates with the stepping assembly (4) to carry out punching operation on the steel belt, and the polishing part (6) polishes the round hole to eliminate burrs; Step two: the steel belt after punching is conveyed into the heating box, the steel belt is preheated, and then the steel belt is pressed into a round pipe by using a rolling press; Step three: the round pipe is sent into the cutting device to be divided into short pipes meeting the length requirement; Step four: the short pipe is sent to the feeding mechanism of the spinning lathe, the feeding mechanism realizes automatic feeding of a single pipe, the spinning lathe carries out spinning processing on the short pipe, and the short pipe forms a cylindrical pipe with one end sealed; Step five: the cylindrical pipe is placed into the drawing die, the hydraulic punch is used for drawing die cutting processing, and equidistant annular lines are formed on the end of the cylindrical pipe away from the seal; Step six: the cylindrical pipe is clamped by the hydraulic punch, necking processing is carried out, and the end away from the seal is necked; Step seven: the sound guide pipe is placed into the ultrasonic cleaning equipment for cleaning, then placed into the drying equipment for drying treatment, and finally the sound absorber sound guide pipe is formed.

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