A steel back side hole processing production line

Abstract

This invention relates to the field of brake pad steel backing production technology, and more particularly to a production line for processing side holes in steel backings. The production line includes a frame and a storage device, a transfer device, a steel backing clamping device, a double-headed drilling device, and a discharge device mounted on the frame. The storage device, clamping device, and discharge device are arranged laterally. The transfer device has a pick-and-place end that can slide and move up and down laterally. The double-headed drilling device is located longitudinally beside the clamping device. The storage device stores the steel backings. The transfer device transfers the steel backings from the storage device to the clamping device and also from the clamping device to the discharge device. The clamping device positions and holds the steel backings, ensuring that the sides of the steel backings face the double-headed drilling device. The double-headed drilling device includes two sets of drilling mechanisms, each capable of drilling side holes at two different positions on the sides of the steel backings. The discharge device receives the steel backings. This production line features a high degree of automation and high processing precision.

Description

Technical Field

[0001] This invention relates to the field of brake pad steel backing production technology, and in particular to a production line for processing side holes in steel backing. Background Technology

[0002] Existing technologies have such Figure 1 The brake pad steel backing is shown.

[0003] Steel backings are generally produced by stamping, and the through holes and uneven structures in the thickness direction of the steel backing can be punched out separately during the stamping process. However, as... Figure 1 The side hole 011 of the steel backing 01 cannot be obtained through a stamping structure and must be drilled separately. Therefore, the existing technology involves having production personnel drill the side hole separately using a drilling machine after the steel backing has undergone the stamping process. For example... Figure 1 The steel backing shown includes two side holes, and the relative positioning of these two side holes requires high precision. Currently, the manual production method results in low automation and low production efficiency in the machining of the side holes. Furthermore, because the drilling is done manually, the positional and dimensional accuracy of the side holes is poor, leading to a low product qualification rate.

[0004] Therefore, it is necessary to make improvements to address the problems existing in the current technology. Summary of the Invention

[0005] The purpose of this invention is to provide a production line for machining side holes on steel backing, which aims to solve the problem that in the prior art, the side holes on steel backing need to be drilled separately by production personnel using a drilling machine, resulting in a low degree of automation.

[0006] To achieve the above objectives, the present invention provides a steel backing side hole processing production line, comprising a frame and a storage device, a transfer device, a steel backing clamping device, a double-headed drilling device, and a discharge device disposed on the frame. The storage device, the steel backing clamping device, and the discharge device are arranged laterally. The transfer device is provided with a pick-and-place end that can slide and rise laterally. The double-headed drilling device is located on the longitudinal side of the steel backing clamping device. The storage device is used to store the steel backing. The transfer device is used to transfer the steel backing from the storage device to the steel backing clamping device and also to transfer the steel backing from the steel backing clamping device to the discharge device. The steel backing clamping device is used to position and clamp the steel backing, and to position the side of the steel backing towards the double-headed drilling device. The double-headed drilling device includes two sets of drilling mechanisms, which can drill side holes at two positions on the side of the steel backing, respectively. The discharge device is used to receive the steel backing.

[0007] Furthermore, the steel back clamping device includes a placement frame, a lateral positioning mechanism, and an upper longitudinal bidirectional positioning mechanism. The placement frame has a placement position that can support the bottom of the steel back and abut it longitudinally. The lateral positioning mechanism is used to move closer to the steel back from the lateral sides of the placement position to perform lateral positioning. The upper longitudinal bidirectional positioning mechanism is used to press the steel back onto the placement position in the longitudinal direction and from top to bottom. The steel back clamping device can be raised and lowered relative to the frame.

[0008] Furthermore, the lateral positioning mechanism includes a longitudinal slider and two sets of lateral positioning components. The longitudinal slider is slidably connected to the bottom of the placement frame along the longitudinal direction and is driven to slide by a cylinder mounted on the placement frame. Both sets of lateral positioning components are drivenly connected to the longitudinal slider. The lateral positioning components include a connecting block and a lateral positioning block. The connecting block includes a first connecting end, a second connecting end, and a middle connecting end located between the first connecting end and the second connecting end. The first connecting end is hinged to the bottom of the placement frame. The middle connecting end is slidably connected to the longitudinal slider along the lateral direction and can rotate relative to the longitudinal slider. The second connecting end is slidably connected to the lateral positioning block along the longitudinal direction and can rotate relative to the lateral positioning block. The lateral positioning block is slidably connected to the placement frame along the lateral direction. When the longitudinal slider slides along the longitudinal direction, the two lateral positioning blocks can move relative to each other in the lateral direction.

[0009] Furthermore, the upper longitudinal bidirectional positioning mechanism includes a slide rod, a clamping block, an upper positioning block, and a transmission rod; the slide rod is slidably connected to the top of the placement frame along the longitudinal direction and is driven to slide by a cylinder set in the placement frame; the clamping block is fixed to the end of the slide rod to press the steel back into the placement position along the longitudinal direction; the transmission rod is slidably connected to the slide rod along the longitudinal direction and is driven to slide by a cylinder set in the slide rod; the first end of the transmission rod is close to the clamping block and is provided with a vertical sliding groove; the upper positioning block includes a sliding end, a clamping end, and a central hinged end located between the sliding end and the clamping end; the sliding end is slidably connected to the vertical sliding groove along the vertical direction and can rotate relative to the vertical direction; the central hinged end is hinged to the clamping block; the clamping end is used to press the steel back into the placement position from top to bottom.

[0010] Furthermore, the dual-head drilling device also includes a position adjustment mechanism mounted on the frame. The position adjustment mechanism includes two drilling base plates, and two drilling mechanisms are respectively connected to the two drilling base plates. The position adjustment mechanism can simultaneously adjust the position of the two drilling base plates in the lateral direction and the relative angle between the two drilling base plates. The drilling mechanism includes a drilling power component and a feed component. The drilling power component is slidably connected to the drilling base plate, and the feed component is used to drive the drilling power component to feed in the direction of the steel back. The drill bit is detachably connected to the drilling power component.

[0011] Furthermore, the posture adjustment mechanism includes two sets of lead screw and nut drive assemblies and two sets of mounting assemblies, with a drilling mechanism mounted on each set of mounting assemblies; the two sets of lead screw and nut drive assemblies are arranged in parallel, each lead screw extends laterally, is a forward and reverse threaded lead screw, and has adjusting sleeves screwed onto both ends of the thread; the mounting assemblies include a first sliding seat, a second sliding seat, an adapter plate, and a drilling base plate, the first sliding seat and the second sliding seat are both laterally slidably connected to the frame, the first sliding seat is connected to the adjusting sleeve of one set of lead screw and nut drive assemblies, the second sliding seat is connected to the adjusting sleeve on the same side of the other set of lead screw and nut drive assemblies, the first sliding seat is rotatably connected to the drilling base plate with the rotating shaft extending vertically, the second sliding seat is rotatably connected to the adapter plate with the rotating shaft extending vertically, the adapter plate is slidably connected to the drilling base plate with the sliding direction parallel to the feed direction of the drilling mechanism.

[0012] Furthermore, the feed assembly includes a feed force adjustment module and a feed screw driven to rotate by a servo motor, with the servo motor fixed to the drilling substrate. The feed force adjustment module includes a first connecting plate and a second connecting plate. The second connecting plate is connected to a feed sleeve, which is screwed to the feed screw. The first connecting plate is connected to the drilling power assembly via a feed force transmission block. A feed force adjustment cylinder is provided between the first and second connecting plates. The cylinder body of the feed force adjustment cylinder is connected to the first connecting plate, and the cylinder body is also connected to a guide post parallel to the feed direction. The second connecting plate is provided with a guide hole, and the second connecting plate is slidably connected to the guide post via the guide hole. The telescopic rod of the feed force adjustment cylinder abuts against the second connecting plate. Adjusting the air pressure of the input feed force adjustment cylinder can adjust the feed force during drilling.

[0013] Furthermore, a detection mounting plate is fixedly connected to the end of the guide post. A touch switch facing the second connecting plate is provided on the detection mounting plate. When the second connecting plate moves to the limit position closest to the detection mounting plate, the second connecting plate contacts the touch switch, and the touch switch is connected. When the second connecting plate leaves the limit position, the second connecting plate releases contact with the touch switch, and the touch switch is disconnected. A spring is sleeved on the guide post, and the two ends of the spring abut against the adjusting feed force adjusting cylinder and the second connecting plate, respectively.

[0014] Furthermore, the production line includes a control system capable of executing the following steps: After each drill bit change, the control system performs a drill bit positioning step: the servo motor rotates, causing the feed force adjustment module, along with the drilling power assembly, to move towards the steel backing until the drill bit contacts the steel backing. When the touch switch is disconnected, the control system records the current encoder parameters of the servo motor and defines them as the drilling start position. Before each drilling operation with the same drill bit, the control system performs a drill bit detection step: the servo motor rotates, causing the feed force adjustment module, along with the drilling power assembly, to move towards the steel backing. If the servo motor rotates to the drilling start position while the touch switch is disconnected, the drill bit and steel backing positions are considered normal. If the servo motor does not rotate to the drilling start position but the touch switch is disconnected prematurely, the drill bit or steel backing position is considered abnormal. If the servo motor rotates to the drilling start position but the touch switch remains connected, the drill bit or steel backing position is considered abnormal. During the drill bit positioning and drill bit detection steps, the air pressure of the feed force adjustment cylinder decreases or leaks.

[0015] Furthermore, the drilling mechanism also includes an auxiliary slider, which is slidably connected to the drilling power assembly in a direction parallel to the feed direction and is driven to slide by a cylinder of the drilling power assembly. The auxiliary slider is fitted with an alloy sleeve, through which the drill bit passes. Before the actual drilling, the alloy sleeve moves away from the drilling power assembly but still covers the drill bit to improve its stability. The drilling mechanism feeds to drill a shallow positioning recess on the side of the steel backing. During the actual drilling, the alloy sleeve moves closer to the drilling power assembly, and the drilling mechanism feeds to drill a side hole on the side of the steel backing. After drilling, the alloy sleeve reciprocates to clean debris from the drill bit.

[0016] The steel backing side hole processing production line provided by this invention can automatically complete the work of feeding, transferring, positioning and clamping, drilling and unloading of steel backings compared with the prior art. It has low human intervention and high degree of automation during production, and the position and dimensional accuracy of the processed side holes are high. Attached Figure Description

[0017] Figure 1 It is a three-dimensional structural diagram of the steel backing;

[0018] Figure 2 This is the three-dimensional structure of the steel back side hole processing production line of the present invention. Figure 1 ;

[0019] Figure 3 This is the three-dimensional structure of the steel back side hole processing production line of the present invention. Figure 2 ;

[0020] Figure 4 This is a top view of the steel back side hole processing production line of the present invention;

[0021] Figure 5It is a three-dimensional structure of a steel back clamping device and a double-headed drilling device. Figure 1 ;

[0022] Figure 6 It is a three-dimensional structure of a steel back clamping device and a double-headed drilling device. Figure 2 ;

[0023] Figure 7 It is a three-dimensional structure of a steel back clamping device. Figure 1 ;

[0024] Figure 8 This is a three-dimensional structural diagram of the steel back clamping device when it clamps the steel back.

[0025] Figure 9 It is a three-dimensional structure of a steel back clamping device. Figure 2 ;

[0026] Figure 10 This is a three-dimensional structural diagram of the upper longitudinal bidirectional positioning mechanism;

[0027] Figure 11 This is a partially exploded structural diagram of the upper longitudinal bidirectional positioning mechanism;

[0028] Figure 12 This is a three-dimensional structural diagram of a double-headed drilling device;

[0029] Figure 13 It is a three-dimensional structure of the drilling mechanism and the posture adjustment mechanism. Figure 1 ;

[0030] Figure 14 It is a three-dimensional structure of the drilling mechanism and the posture adjustment mechanism. Figure 2 ;

[0031] Figure 15 It is a three-dimensional structural diagram of the drilling mechanism;

[0032] Figure 16 It is the three-dimensional structure of the feed component. Figure 1 ;

[0033] Figure 17 It is the three-dimensional structure of the feed component. Figure 2 ;

[0034] Figure 18 This is an exploded view of the feed assembly;

[0035] Figure 19 This is a three-dimensional sectional view of the feed force adjustment module.

[0036] Explanation of reference numerals in the attached figures:

[0037] 01. Steel backing; 011. Side hole;

[0038] 1. Rack;

[0039] 2. Storage device;

[0040] 3. Transfer device;

[0041] 4. Steel back clamping device; 41. Placement rack; 42. Lateral positioning mechanism; 421. Longitudinal slider; 422. Connecting block; 4221. First connecting end; 4222. Second connecting end; 4223. Middle connecting end; 423. Lateral positioning block; 43. Upper longitudinal bidirectional positioning mechanism; 431. Slide rod; 432. Pressing block; 433. Upper positioning block; 4331. Sliding end; 4332. Pressing end; 4333. Middle hinge end; 434. Transmission rod; 4341. Vertical slide groove; 44. Lifting mechanism;

[0042] 5. Dual-head drilling device; 51. Drilling mechanism; 511. Drilling power assembly; 512. Feed assembly; 5121. Feed force adjustment module; 51211. First connecting plate; 51212. Second connecting plate; 51213. Feed sleeve; 51214. Feed force adjustment cylinder; 51215. Guide post; 51216. Detection mounting plate; 51217. Touch switch; 51218. Spring; 5122. Servo motor; 5123. Feed screw; 513. Feed force transmission block; 52. Position adjustment mechanism; 521. Drilling base plate; 522. Positive and negative thread screw; 523. Adjustment sleeve; 524. First sliding seat; 525. Second sliding seat; 526. Adapter plate; 53. Drill bit; 54. Auxiliary slider; 55. Alloy sleeve;

[0043] 6. Discharge device. Detailed Implementation

[0044] The embodiments of the present invention will be described in detail below.

[0045] In this embodiment, unless otherwise explicitly specified and limited, terms such as "set in," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through one or more intermediate media. Those skilled in the art can understand the specific meaning of these terms in this embodiment based on the specific circumstances. The directional terms appearing in this embodiment are for the purpose of better describing the characteristics of the features and the relationships between them. It should be understood that when the placement direction of this embodiment changes, the direction of the characteristics of the features and the relationships between them also changes accordingly. Therefore, directional terms do not constitute an absolute limitation on the characteristics of the features and the relationships between them in space, but only a relative limitation.

[0046] This embodiment provides a production line for machining back-side holes in steel, such as... Figures 1 to 19As shown, it includes a frame 1 and a storage device 2, a transfer device 3, a steel back clamping device 4, a double-headed drilling device 5, and a discharge device 6 disposed on the frame 1. The storage device 2, the steel back clamping device 4, and the discharge device 6 are arranged laterally. The transfer device 3 is provided with a pick-up and put-down end, which can slide and rise laterally. The double-headed drilling device 5 is located on the longitudinal side of the steel back clamping device 4. The storage device 2 is used to store the steel back. The transfer device 3 is used to transfer the steel back from the storage device 2 to the steel back clamping device 4, and also to transfer the steel back from the steel back clamping device 4 to the discharge device 6. The steel back clamping device 4 is used to position and clamp the steel back, and to make the side of the steel back face the double-headed drilling device 5. The double-headed drilling device 5 includes two sets of drilling mechanisms 51, which can drill side holes at two positions on the side of the steel back respectively. The discharge device 6 is used to receive the steel back.

[0047] It should be noted that the storage device 2, transfer device 3, and discharge device 6 mentioned in this embodiment are all prior art, so their specific structures will not be described in detail in this embodiment. The storage device 2 is used to store the steel backing to be processed and to send out the steel backing to be processed. The transfer device 3 is used to transfer the steel backing to be processed from the storage device 2 to the steel backing clamping device 4. The transfer device 3 is also used to transfer the processed steel backing from the steel backing clamping device 4 to the discharge device 6. The discharge device 6 is used to receive the processed steel backing.

[0048] Based on the above structural design, this steel back side hole processing production line can automatically complete the feeding, transfer, positioning and clamping, drilling and unloading of steel backs, with low human intervention during production.

[0049] In this embodiment, as Figures 5 to 11 As shown, the steel back clamping device 4 includes a placement frame 41, a lateral positioning mechanism 42, and an upper longitudinal bidirectional positioning mechanism 43. The placement frame 41 has a placement position that can support the bottom of the steel back and abut it longitudinally. This placement position is achieved by setting an L-shaped blocking structure on the placement frame 41, which can be two L-shaped baffles. The lateral positioning mechanism 42 is used to laterally position the steel back by approaching it from both sides of the placement position. The upper longitudinal bidirectional positioning mechanism 43 is used to press the steel back onto the placement position in the longitudinal direction and from top to bottom. Through the cooperation of the above two mechanisms and the placement position, the steel back can be accurately positioned. The steel back clamping device 4 can be raised and lowered relative to the frame 1. In this embodiment, a lifting mechanism 44 is provided on the frame 1. The lifting mechanism 44 drives the steel back clamping device 4 to rise and fall, so that the steel back is aligned with the double-headed drilling device 5 at a suitable height. The lifting mechanism 44 adopts a common screw and nut type lifting mechanism.

[0050] In this embodiment, as Figures 7 to 9As shown, the lateral positioning mechanism 42 includes a longitudinal slider 421 and two sets of lateral positioning components. The longitudinal slider 421 is slidably connected to the bottom of the placement frame 41 along the longitudinal direction and is driven to slide by a cylinder mounted on the placement frame 41. Both sets of lateral positioning components are drively connected to the longitudinal slider 421. The lateral positioning components include a connecting block 422 and a lateral positioning block 423. The connecting block 422 includes a first connecting end 4221, a second connecting end 4222, and a middle connecting end 4223 located between the first connecting end 4221 and the second connecting end 4222. The first connecting end 4221 is hinged to the bottom of the placement frame 41. The middle connecting end 4223 is slidably connected to the longitudinal slider 421 along the lateral direction and can rotate relative to the longitudinal slider 421. The second connecting end 4222 is slidably connected to the transverse positioning block 423 along the lateral direction and can rotate relative to the transverse positioning block 423. The transverse positioning block 423 is slidably connected to the placement frame 41 along the lateral direction. When the longitudinal slider 421 slides along the lateral direction, the two transverse positioning blocks 423 can move relative to each other in the lateral direction. Through the above structural arrangement, with the help of reasonable hinge point arrangement, when the longitudinal slider 421 slides along the lateral direction, the two transverse positioning blocks 423 move closer to each other and clamp the steel back from both sides to achieve lateral positioning; when the longitudinal slider 421 moves in the opposite direction, they are released. The longitudinal cylinder drive is converted into the synchronous opposite or back-to-back movement of two transverse positioning blocks 423. Only one cylinder is needed to synchronously drive the transverse positioning blocks 423 on both sides. This mechanism has a compact structure, good synchronization, and ensures that the steel back is clamped in the center position.

[0051] In this embodiment, as Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the upper longitudinal bidirectional positioning mechanism 43 includes a slide rod 431, a clamping block 432, an upper positioning block 433, and a transmission rod 434; the slide rod 431 is slidably connected to the top of the placement frame 41 along the longitudinal direction and is driven to slide by a cylinder mounted on the placement frame 41. Figure 10 The cylinder is located on the left side. The clamping block 432 is fixed to the end of the slide rod 431 to press the steel back longitudinally into the placement position. The transmission rod 434 is slidably connected to the slide rod 431 longitudinally and is located in the cylinder of the slide rod 431. Figure 10The cylinder located on the right side drives the sliding mechanism (specifically in this embodiment, the slide rod 431 has an axial through hole, and the transmission rod 434 passes through the axial through hole). The first end of the transmission rod 434 is close to the clamping block 432, and the first end of the transmission rod 434 is provided with a vertical slide groove 4341. The upper positioning block 433 includes a sliding end 4331, a clamping end 4332, and a middle hinged end 4333 located between the sliding end 4331 and the clamping end 4332. The sliding end 4331 is slidably connected to the vertical slide groove 4341 along the vertical direction and can rotate relative to the vertical direction. The middle hinged end 4333 is hinged to the clamping block 432. The clamping end 4332 is used to press the steel back into the placement position from top to bottom. Through the above structural arrangement, the longitudinal and vertical clamping functions are integrated into a compact mechanism, reducing space occupation; during clamping, longitudinal clamping is performed, followed by vertical clamping, ensuring that the steel back fits snugly against the placement position without gaps.

[0052] In this embodiment, the dual-head drilling device 5 further includes a pose adjustment mechanism 52 disposed on the frame 1. The pose adjustment mechanism 52 includes two drilling base plates 521, and two sets of drilling mechanisms 51 are respectively connected to the two drilling base plates 521. The pose adjustment mechanism 52 can simultaneously adjust the position of the two drilling base plates 521 in the lateral direction and the relative angle between the two drilling base plates 521. The drilling mechanism 51 includes a drilling power component 511 and a feed component 512. The drilling power component 511 is slidably connected to the drilling base plate 521, and the feed component 512 is used to drive the drilling power component 511 to feed in the direction of the steel back. The drill bit 53 is detachably connected to the drilling power component 511.

[0053] In this embodiment, as Figures 11 to 13As shown, the posture adjustment mechanism 52 includes two sets of lead screw and nut drive assemblies and two sets of mounting assemblies. Each set of mounting assemblies is equipped with a drilling mechanism 51. The two sets of lead screw and nut drive assemblies are arranged in parallel. Each lead screw extends laterally and is a positive and negative threaded lead screw 522, with adjusting sleeves 523 screwed onto both ends of the thread. The mounting assemblies include a first sliding seat 524, a second sliding seat 525, an adapter plate 526, and the aforementioned drilling base plate 521. Both the first sliding seat 524 and the second sliding seat 525 slide laterally. Connected to the frame 1, the first sliding seat 524 is connected to the adjusting sleeve 523 of one set of lead screw and nut drive assemblies, and the second sliding seat 525 is connected to the adjusting sleeve 523 on the same side of another set of lead screw and nut drive assemblies. The first sliding seat 524 is rotatably connected to the drilling base plate 521 with its rotating shaft extending vertically, and the second sliding seat 525 is rotatably connected to the adapter plate 526 with its rotating shaft extending vertically. The adapter plate 526 is slidably connected to the drilling base plate 521 with its sliding direction parallel to the feed direction of the drilling mechanism 51. When the two positive and negative threaded lead screws 522 rotate synchronously in the same direction, they drive the two drilling base plates 521 and the drilling mechanism 51 on them to move synchronously in the lateral direction, adjusting the lateral position of the drill hole. When the two lead screws 522 rotate differentially (at different speeds or in different directions), each drilling substrate 521 is connected to the two lead screws 522 via a first sliding seat 524 and a second sliding seat 525. This differential rotation forces the drilling substrate 521 to rotate around the vertical axis of the first sliding seat 524, thereby changing the relative angle between the two drill bits 53 to adapt to different hole spacing or angle processing requirements. The adapter plate 526 is slidably connected to the drilling substrate 521 along the feed direction to avoid motion interference.

[0054] In this embodiment, as Figures 11 to 19As shown, the feed assembly 512 includes a feed force adjustment module 5121 and a feed screw 5123 driven to rotate by a servo motor 5122. The servo motor 5122 is fixed to the drilling base plate 521. The feed force adjustment module 5121 includes a first connecting plate 51211 and a second connecting plate 51212. A feed sleeve 51213 is connected to the second connecting plate 51212. The feed sleeve 51213 is screwed to the feed screw 5123. The first connecting plate 51211 is connected to the drilling power assembly 511 via the feed force transmission block 513. The first connecting plate 51211 and the second connecting plate 51212 are connected to each other. A feed force regulating cylinder 51214 is provided between the connecting plates 51212. The cylinder body of the feed force regulating cylinder 51214 is connected to the first connecting plate 51211. The cylinder body of the feed force regulating cylinder 51214 is also connected to a guide post 51215 parallel to the feed direction. The second connecting plate 51212 is provided with a guide hole. The second connecting plate 51212 is slidably connected to the guide post 51215 through the guide hole. The telescopic rod of the feed force regulating cylinder 51214 abuts against the second connecting plate 51212. Adjusting the air pressure of the input feed force regulating cylinder 51214 can adjust the feed force during drilling. Based on the above structural configuration, when the servo motor 5122 drives the feed screw 5123 to rotate, the feed sleeve 51213 moves relative to the drilling substrate 521. That is, the feed force adjustment module 5121 also moves relative to the drilling substrate 521. The feed force adjustment module 5121 provides the function of limiting the maximum drilling force to prevent the drill bit 53 from being damaged due to excessive force. Specifically, the second connecting plate 51212 is flexibly connected to the first connecting plate 51211 through the guide post 51215. The first connecting plate 51211 is connected to the drilling power assembly 511 through the feed force transmission block 513. The distance between the second connecting plate 51212 and the feed sleeve 51213, that is, between the first connecting plate 51211 and the second connecting plate 51212, is equal to the distance between the drilling power assembly 511 and the feed sleeve 51213. The first connecting plate 51211 and the second connecting plate 51212 are kept apart by the feed force adjusting cylinder 51214. However, due to the compressibility of gas, the connection between the first connecting plate 51211 and the second connecting plate 51212 is not completely rigid, but rather a limited rigid connection. When drilling encounters resistance, the feed force adjusting cylinder 51214 can be compressed, causing the first connecting plate 51211 to retract relative to the second connecting plate 51212. In other words, the drilling power assembly 511 retracts relative to the feed sleeve 51213. Due to the retraction effect, the drill bit 53 will not be fed rigidly, thus protecting the drill bit 53. At the same time, the force output by the feed force adjusting cylinder 51214 is basically equal to the feed force of the drill bit 53. Therefore, the feed force of the drill bit 53 can be adjusted by adjusting the force output by the feed force adjusting cylinder 51214.

[0055] In this embodiment, as Figures 16 to 19As shown, a detection mounting plate 51216 is fixedly connected to the end of the guide post 51215 (the connection is achieved by screwing the bolt into the guide post 51215, and the detection mounting plate 51216 is clamped between the end of the guide post 51215 and the bolt head for fixation). A touch switch 51217 is provided on the detection mounting plate 51216 facing the second connecting plate 51212. When the second connecting plate 51212 moves to its closest limit to the detection mounting plate 51216... When in the limit position, the second connecting plate 51212 contacts the touch switch 51217, and the touch switch 51217 is connected. When the second connecting plate 51212 leaves the limit position, the second connecting plate 51212 releases contact with the touch switch 51217, and the touch switch 51217 is disconnected. A spring 51218 is fitted on the guide post 51215, and the two ends of the spring 51218 respectively abut against the adjusting feed force adjusting cylinder 51214 and the second connecting plate 51212. In continuous production, it is inevitable to replace the drill bit 53. When reinstalling the drill bit 53, it is difficult to ensure that the tip of the drill bit 53 is in the same position as the last installation. Even if the drill bit 53 is not replaced, it may retract due to excessive force during drilling, which will also change the position of the tip of the drill bit 53. All of the above situations will cause the starting position of the drilling to change, which in turn will cause the depth to change. The resulting actual depth of the side hole will have an error compared with the design depth, affecting the product yield. Therefore, this embodiment includes a touch switch 51217 for indirectly detecting the position of the drill bit 53. During each detection, the feed force adjusting cylinder 51214 is depressurized, causing the first connecting plate 51211 and the second connecting plate 51212 to move away from each other solely due to the elastic force of the spring 51218. In this structure, since the detection mounting plate 51216 is fixed to the guide post 51215, the guide post 51215 is fixed to the feed force adjusting cylinder 51214, and the feed force adjusting cylinder 51214 is fixed to the first connecting plate 51211, the second connecting plate 51212 is positioned furthest from the first connecting plate 51211 under the action of the spring 51218, and is also at its extreme position closest to the detection mounting plate 51216, keeping the touch switch 51217 continuously connected. When the test begins, the servo motor 5122 is started and fed slowly, and the drill bit 53 gradually approaches the steel back. When the tip of the drill bit 53 just touches the steel back, the drill bit 53 stops moving forward, and the first connecting plate 51211 also stops moving forward. The second connecting plate 51212 continues to move forward under the drive of the feed screw 5123. After the second connecting plate 51212 moves closer to the first connecting plate 51211, that is, after the second connecting plate 51212 leaves the limit position, the second connecting plate 51212 releases the pressure on the touch switch 51217, and the touch switch 51217 becomes open. The position of the drill bit 53 is sensed based on the above principle.Specifically, the production line includes a control system capable of executing the following steps: After each drill bit 53 is changed, the control system performs a drill bit positioning step: the servo motor 5122 rotates, causing the feed force adjustment module 5121, along with the drilling power assembly 511, to move towards the steel back until the drill bit 53 contacts the steel back. When the touch switch 51217 is disconnected, the control system records the encoder parameters of the current servo motor 5122 and defines them as the drilling start position; before each drilling operation with the same drill bit 53, the control system performs a drill bit detection step: the servo motor 5122 rotates, causing the feed force adjustment module 5121, along with the drilling power assembly 511, to move towards the steel back. If the servo motor 5122 is not in contact with the steel back, the control system records the encoder parameters of the current servo motor 5122 and defines them as the drilling start position; before each drilling operation with the same drill bit 53, the control system performs a drill bit detection step: the servo motor 5122 rotates, causing the feed force adjustment module 5121, along with the drilling power assembly 511, to move towards the steel back. If the servo motor 5122 is in contact with the steel back, the control system records the encoder parameters of the current servo motor 5122 and defines them as the drilling start position. If the servo motor 5122 rotates to the drilling start position and the touch switch 51217 disconnects simultaneously, it indicates that the drill bit 53 and the steel backing are in normal positions. If the servo motor 5122 does not rotate to the drilling start position but the touch switch 51217 disconnects prematurely, it indicates that the drill bit 53 or the steel backing is in an abnormal position (generally, the placement of the steel backing is closer to the dual-head drilling device 5 than the ideal position). If the servo motor 5122 rotates to the drilling start position but the touch switch 51217 remains connected, it indicates that the drill bit 53 or the steel backing is in an abnormal position (generally, the drill bit 53 is broken or retracted, or the placement of the steel backing is farther away from the dual-head drilling device 5 than the ideal position). In case of an abnormality, the control system will alarm, and the staff will check for the fault. Based on the above settings, it can be ensured that the starting position of the drill bit 53 is as close as possible to the side of the steel backing during each drilling operation, so that the depth of the drilled side hole meets the standard. Furthermore, in this embodiment, a check is performed before each drilling operation to promptly detect abnormalities in the position of the drill bit 53, breakage, or omissions or misalignments of the steel backing, preventing batch scrap or equipment damage. Of course, since the pressing button of the touch switch 51217 has a certain travel distance, under the influence of this travel distance, the control system will not alarm when there is an acceptable error between the drill bit 53 and the steel backing. These acceptable errors will be offset by the travel distance of the pressing button of the touch switch 51217, ensuring normal production. To allow the spring 51218 to function, the air pressure of the feed force regulating cylinder 51214 decreases or leaks during the drill bit positioning and drill bit detection steps.

[0056] In this embodiment, as Figures 13 to 15 As shown, the drilling mechanism 51 also includes an auxiliary slider 54, which is slidably connected to the drilling power assembly 511 in a direction parallel to the feed direction and is disposed in the cylinder of the drilling power assembly 511. Figure 13The topmost cylinder drives the sliding mechanism 54, which is equipped with an alloy sleeve 55. The drill bit 53 passes through the alloy sleeve 55, which has the advantage of wear resistance. Before drilling, the alloy sleeve 55 moves away from the drilling power assembly 511, but still covers the drill bit 53 to improve its stability. The drilling mechanism 51 feeds to drill a shallow positioning groove on the side of the steel backing. During this process, the alloy sleeve 55 guides the drill bit 53 to enter the hole precisely and prevents it from deviating. During drilling, the alloy sleeve 55 moves closer to the drilling power assembly 511, and the drilling mechanism 51 feeds to drill a side hole on the side of the steel backing. During this process, the alloy sleeve 55 avoids interference with the steel backing, and the drill bit 53 completes the drilling according to its normal stroke. After drilling, the alloy sleeve 55 moves back and forth to clean the debris on the drill bit 53 and prepare for the next drilling.

[0057] In summary, the steel back side hole processing production line provided by this invention has a high degree of automation, and the positional and dimensional accuracy of the processed side holes are both high.

[0058] Where there is no conflict, the above embodiments and features can be combined with each other.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the preferred technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the present invention.

Claims

1. A production line for machining back-side holes in steel, characterized in that: It includes a frame (1) and a storage device (2), a transfer device (3), a steel back clamping device (4), a double-head drilling device (5) and a discharge device (6) installed on the frame (1). The storage device (2), the steel back clamping device (4) and the discharge device (6) are arranged in the transverse direction. The transfer device (3) is provided with a pick-up and drop-off end, and the pick-up and drop-off end can slide and rise in the transverse direction. The double-head drilling device (5) is located on the longitudinal side of the steel back clamping device (4). Storage device (2) is used to store steel backing; The transfer device (3) is used to transfer the steel back from the storage device (2) to the steel back clamping device (4), and also to transfer the steel back from the steel back clamping device (4) to the discharge device (6); The steel back clamping device (4) is used to position and clamp the steel back and make the side of the steel back face the double-head drilling device (5). The dual-head drilling device (5) includes two sets of drilling mechanisms (51), which can drill side holes at two positions on the side of the steel backing respectively; the dual-head drilling device (5) also includes a position adjustment mechanism (52) set on the frame (1), which includes two drilling base plates (521), and the two sets of drilling mechanisms (51) are respectively connected to the two drilling base plates (521). The position adjustment mechanism (52) can simultaneously adjust the position of the two drilling base plates (521) in the lateral direction and the relative angle between the two drilling base plates (521); the drilling mechanism (51) includes a drilling power assembly (511) and a feed assembly (512), and the drilling power assembly (511) is slidably connected to the drilling base plate (512). A hole base plate (521) and a feed assembly (512) are provided to drive the drilling power assembly (511) to feed in the direction of the steel back. A drill bit (53) is detachably connected to the drilling power assembly (511). The feed assembly (512) includes a feed force adjustment module (5121) and a feed screw (5123) driven to rotate by a servo motor (5122). The servo motor (5122) is fixed to the drilling base plate (521). The feed force adjustment module (5121) includes a first connecting plate (51211) and a second connecting plate (51212). The second connecting plate (51212) is connected to a feed sleeve (51213), which is screwed to the feed screw (5123). The first connecting plate (51212) is connected to the feed screw (51213). 51211) The feed force transmission block (513) is connected to the drilling power assembly (511). A feed force adjusting cylinder (51214) is provided between the first connecting plate (51211) and the second connecting plate (51212). The cylinder body of the feed force adjusting cylinder (51214) is connected to the first connecting plate (51211). The cylinder body of the feed force adjusting cylinder (51214) is also connected to a guide post (51215) parallel to the feed direction. The second connecting plate (51212) is provided with a guide hole. The second connecting plate (51212) is slidably connected to the guide post (51215) through the guide hole. The telescopic rod of the feed force adjusting cylinder (51214) abuts against the second connecting plate (51212). Adjust the input feed. The air pressure of the force regulating cylinder (51214) can regulate the feed force during drilling; a detection mounting plate (51216) is fixedly connected to the end of the guide post (51215). A touch switch (51217) facing the second connecting plate (51212) is provided on the detection mounting plate (51216). When the second connecting plate (51212) moves to the limit position closest to the detection mounting plate (51216), the second connecting plate (51212) contacts the touch switch (51217), and the touch switch (51217) is connected. When the second connecting plate (51212) leaves the limit position, the second connecting plate (51212) releases the contact with the touch switch (51217), and the touch switch (51217) is disconnected.A spring (51218) is fitted on the guide post (51215), and the two ends of the spring (51218) abut against the feed force regulating cylinder (51214) and the second connecting plate (51212), respectively. The discharge device (6) is used to receive the steel backing; The production line includes a control system capable of performing the following steps; After each drill bit (53) is replaced, the control system performs the drill bit positioning step: the servo motor (5122) rotates to move the feed force adjustment module (5121) together with the drilling power assembly (511) towards the steel back until the drill bit (53) contacts the steel back. When the touch switch (51217) is disconnected, the control system records the encoder parameters of the current servo motor (5122) and defines them as the drilling start position. Before each drilling operation with the same drill bit (53), the control system performs a drill bit detection step: the servo motor (5122) rotates to move the feed force adjustment module (5121) and the drilling power assembly (511) together toward the steel back. If the servo motor (5122) rotates to the drilling start position and the touch switch (51217) is disconnected at the same time, it is determined that the drill bit (53) and the steel back are in normal position. If the servo motor (5122) does not rotate to the drilling start position but the touch switch (51217) is disconnected in advance, it is determined that the drill bit (53) or the steel back is in abnormal position. If the servo motor (5122) rotates to the drilling start position but the touch switch (51217) is still connected, it is determined that the drill bit (53) or the steel back is in abnormal position. During the drill bit positioning and drill bit inspection steps, the air pressure of the feed force regulating cylinder (51214) decreases or leaks.

2. The steel back-side hole processing production line according to claim 1, characterized in that: The steel back clamping device (4) includes a placement frame (41), a lateral positioning mechanism (42), and an upper longitudinal bidirectional positioning mechanism (43). The placement frame (41) has a placement position that can support the bottom of the steel back and abut it longitudinally. The lateral positioning mechanism (42) is used to move closer to the steel back from the lateral sides of the placement position to perform lateral positioning. The upper longitudinal bidirectional positioning mechanism (43) is used to press the steel back into the placement position in the longitudinal direction and from top to bottom. The steel back clamping device (4) can be raised and lowered relative to the frame (1).

3. The steel back-side hole processing production line according to claim 2, characterized in that: The transverse positioning mechanism (42) includes a longitudinal slider (421) and two sets of transverse positioning components. The longitudinal slider (421) is slidably connected to the bottom of the placement rack (41) along the longitudinal direction and is driven to slide by a cylinder set in the placement rack (41). Both sets of transverse positioning components are connected to the longitudinal slider (421) in a transmission. The lateral positioning component includes a connecting block (422) and a lateral positioning block (423). The connecting block (422) includes a first connecting end (4221), a second connecting end (4222), and a middle connecting end (4223) located between the first connecting end (4221) and the second connecting end (4222). The first connecting end (4221) is hinged to the bottom of the placement frame (41). The middle connecting end (4223) is slidably connected to the longitudinal slider (421) in the lateral direction and can rotate relative to the longitudinal slider (421). The second connecting end (4222) is slidably connected to the lateral positioning block (423) in the longitudinal direction and can rotate relative to the lateral positioning block (423). The lateral positioning block (423) is slidably connected to the placement frame (41) in the lateral direction. When the longitudinal slider (421) slides longitudinally, the two transverse positioning blocks (423) can move relative to each other in the transverse direction.

4. The steel back-side hole processing production line according to claim 2, characterized in that: The upper longitudinal bidirectional positioning mechanism (43) includes a slide rod (431), a clamping block (432), an upper positioning block (433), and a transmission rod (434); A slide rod (431) is slidably connected to the top of the placement rack (41) along the longitudinal direction and is driven to slide by a cylinder on the placement rack (41). A clamping block (432) is fixed to the end of the slide rod (431) to press the steel back longitudinally into the placement position. A transmission rod (434) is slidably connected to the slide rod (431) along the longitudinal direction and is driven to slide by a cylinder on the slide rod (431). The first end of the transmission rod (434) is close to the clamping block (432), and the first end of the transmission rod (434) is provided with a vertical... The upper positioning block (433) of the slide groove (4341) includes a sliding end (4331), a pressing end (4332) and a central hinge end (4333) located between the sliding end (4331) and the pressing end (4332). The sliding end (4331) is slidably connected to the vertical slide groove (4341) and can rotate relative to the vertical. The central hinge end (4333) is hinged to the pressing block (432). The pressing end (4332) is used to press the steel back into the placement position from top to bottom.

5. The steel back-side hole processing production line according to claim 1, characterized in that: The position adjustment mechanism (52) includes two sets of lead screw and nut drive assemblies and two sets of mounting assemblies, with a drilling mechanism (51) mounted on each set of mounting assemblies; Two sets of lead screw and nut drive assemblies are arranged in parallel. Each lead screw extends laterally and is a positive and negative threaded lead screw (522). Adjustment sleeves (523) are screwed onto both ends of the thread. The mounting assembly includes a first sliding seat (524), a second sliding seat (525), an adapter plate (526), ​​and a drilling base plate (521). The first sliding seat (524) and the second sliding seat (525) are both slidably connected to the frame (1) in the transverse direction. The first sliding seat (524) is connected to the adjusting sleeve (523) of one set of lead screw and nut drive assemblies. The second sliding seat (525) is connected to the adjusting sleeve (523) on the same side of another set of lead screw and nut drive assemblies. The first sliding seat (524) is rotatably connected to the drilling base plate (521) and the rotating shaft extends vertically. The second sliding seat (525) is rotatably connected to the adapter plate (526) and the rotating shaft extends vertically. The adapter plate (526) is slidably connected to the drilling base plate (521) and the sliding direction is parallel to the feed direction of the drilling mechanism (51).

6. The steel back-side hole processing production line according to claim 1, characterized in that: The drilling mechanism (51) also includes an auxiliary slider (54), which is slidably connected to the drilling power assembly (511) in a direction parallel to the feed direction and is driven to slide by the cylinder of the drilling power assembly (511). The auxiliary slider (54) is equipped with an alloy sleeve (55), and the drill bit (53) passes through the alloy sleeve (55). Before the actual drilling, the alloy sleeve (55) moves away from the drilling power assembly (511), but the alloy sleeve (55) still covers the drill bit (53) to improve the stability of the drill bit (53), and the drilling mechanism (51) feeds to drill a positioning shallow pit on the side of the steel back. During the actual drilling, the alloy sleeve (55) moves toward the drilling power assembly (511), and the drilling mechanism (51) feeds to drill a side hole on the side of the steel back. After drilling, the alloy sleeve (55) moves back and forth to clean the debris on the drill bit (53).

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