A drilling device for producing two-hole flat flanges for exhaust pipes

Abstract

The present invention discloses a drilling device for producing two-hole flat flanges for exhaust pipes, relating to the technical field of flange production drilling. The device comprises a drilling machine, the drilling machine being equipped with a lifting drill rig, the drill rig being equipped with a two-axis adjustable double-hole drill, the drilling machine being fixedly connected to a conveyor frame, a sleeve being fixedly connected to the drill shaft unit of the two-axis adjustable double-hole drill, a mounting frame being slidably connected in the middle of the drilling machine, the mounting frame being fixedly connected to hydraulic rods symmetrically distributed along the mounting frame, the mounting frame being fixed to the drilling machine via screws, and a clamping block being fixedly connected to the movable end of the hydraulic rod. The present invention adopts an adjustable positioning frame and a linkage structure with the mounting frame. When replacing flanges of different sizes, only the drill shaft spacing and the clamping block position need to be adjusted to ensure that the flange is automatically aligned with the center of the drill shaft, thus avoiding the problem of offset drilling. The operation is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of flange production drilling, and in particular to a drilling device for producing a two-hole flat flange of an exhaust pipe. Background Art

[0002] Exhaust pipe two-hole flat flanges are commonly used to connect components such as exhaust manifolds, catalytic converters, and mufflers, ensuring a tight connection between the various components. Their typically diamond-shaped outer profile helps improve exhaust airflow, reduce resistance, and enhance overall system efficiency. The two symmetrical holes are typically controlled by a CNC system and equipped with a clamping and drilling actuator. Through automated positioning and drilling processes, they ensure hole position accuracy, diameter consistency, and flange structural stability, meeting the exhaust pipe system's requirements for sealing, connection strength, and assembly precision. They are widely used in the automotive, machinery, and industrial equipment manufacturing sectors.

[0003] In drilling processing, in order to shorten the single-piece processing time, a two-axis adjustable double-hole drill is usually used to achieve double-hole forming in one go to meet the requirements of symmetrical or fixed-pitch hole positions in mass production. However, when the spacing between the two holes needs to be adjusted in different batches of production, although the two-axis adjustable double-hole drill can flexibly adjust the drill bit spacing, it is difficult to reposition the bottom fixture after each adjustment to ensure the centering of the hole position on the flange. Summary of the Invention

[0004] In order to overcome the shortcoming of a traditional double-hole drill that it is difficult to reposition the flange when adjusting the hole spacing, the present invention provides a drilling device for producing a two-hole flat flange of an exhaust pipe.

[0005] A drilling device for producing two-hole flat flanges of exhaust pipes includes a drilling machine, the drilling machine is equipped with a lifting drill, the drilling rig is equipped with a two-axis adjustable double-hole drill, the drilling machine is fixedly connected to a conveying frame, a sleeve is fixedly connected to the drill shaft unit of the two-axis adjustable double-hole drill, the middle of the drilling machine is slidably connected to a mounting frame, the mounting frame is fixedly connected to hydraulic rods symmetrically distributed along the mounting frame, the mounting frame and the drilling machine are fixed by screws, the movable end of the hydraulic rod is fixedly connected to a clamping block, the conveying frame has clamping grooves symmetrically distributed along the conveying frame, the clamping block passes through adjacent clamping grooves and then clamps the flange directly below the two-axis adjustable double-hole drill, the conveying frame has sliding grooves symmetrically distributed along the conveying frame, the flange slides in and out along the sliding groove, the mounting frame is slidably connected to a positioning frame, the positioning frame is in contact with the sleeve, and the positioning frame is slidably connected to a tightening frame for tightening the two-axis adjustable double-hole drill.

[0006] As a preferred technical solution of the present invention, it also includes a scale plate, a mounting groove is opened on the side of the adjustment frame close to the sleeve, the scale plate is fixed in the mounting groove, the adjustment frame is fixed with fixed rods symmetrically distributed along the adjustment frame, the fixed rods are slidably connected to a stopper, and the stopper is in contact with the adjacent sleeve.

[0007] As a preferred technical solution of the present invention, it also includes an arcuate sleeve rod corresponding to the stopper, the arcuate sleeve rod is fixedly connected to the corresponding stopper, and the arcuate sleeve rod is annularly buckled with the adjacent sleeve.

[0008] As a preferred technical solution of the present invention, the outer end surface of the mounting groove protrudes from the scale plate, so that the scale plate is completely embedded in the mounting groove.

[0009] As a preferred technical solution of the present invention, the stopper is provided with an observation line, and the observation line is used to indicate the scale line on the scale plate.

[0010] As a preferred technical solution of the present invention, it also includes a material guide rack for receiving and guiding cutting fluid and drilling waste. The material guide rack is fixedly connected to the drilling machine, and a material guide groove is opened on the downwardly inclined side of the drilling machine close to the material guide rack.

[0011] As a preferred technical solution of the present invention, a material guide hole is opened at the bottom of the chute.

[0012] The present invention has the following advantages: the present invention adopts an adjustable positioning frame and a mounting frame linkage structure. When replacing flanges of different sizes, it is only necessary to adjust the drill shaft spacing and adjust the clamping block position to ensure that the flange is automatically aligned with the drill shaft center, avoiding the problem of offset drilling, and the operation is simple and convenient.

[0013] The present invention integrates a chute conveying structure with an automatic reset function, further improving the automation level and production rhythm stability, effectively solving the problem that traditional fixtures rely on manual disassembly and assembly, are complex to adjust, and affect production line efficiency. It is suitable for the efficient and stable production of large quantities and multiple specifications of flanges.

[0014] When adjusting the spacing between the drill shaft units of a two-axis adjustable double-hole drill, the present invention drives the stopper to slide along the fixed rod through the arc-shaped sleeve rod outside the sleeve, so that the stopper accurately contacts the sleeve outside the eccentric drill shaft, and combines the observation line to accurately measure the spacing of the drill shaft units after dynamic adjustment, thereby significantly improving the processing accuracy of the spacing between the two holes on the flange.

[0015] The present invention forms an interlocking structure through a stop block and an arc-shaped sleeve rod, which fixes the position of the drill shaft unit and the adjustment frame while locking the sleeve, effectively preventing the adjusted drill shaft from deflecting or displacing. This structure not only improves the convenience and accuracy of equipment adjustment, but also enhances the stability of the drilling process.

[0016] The present invention can centrally collect excess cutting fluid and drilling waste through the structural design of the material guide rack and the material guide trough, realize orderly discharge and recycling, keep the working environment clean, and reduce the subsequent cleaning workload.

[0017] The present invention provides a material guide hole at the bottom of the chute, so that the waste generated by drilling falls downward in time, avoiding the waste from splashing or accumulating in the chute and affecting the smooth transportation of the flange, thereby ensuring the continuity and stability of the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a three-dimensional structural diagram of the drilling machine, drilling rig and two-axis adjustable double-hole drill and other components of the present invention.

[0020] Figure 3 It is a partial cross-sectional view of the conveying rack of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting frame, hydraulic rod, screw and other components of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the components such as the position adjustment frame, the scale plate and the fixing rod of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the stopper, arc-shaped sleeve rod and other components of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the position adjustment frame, scale plate, fixing rod and stop block of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the drilling machine and the guide rack and other components of the present invention.

[0026] Figure 9 It is a partial three-dimensional structural diagram of the drilling machine, conveying frame and material guide frame of the present invention.

[0027] In the accompanying drawings: 1: drilling machine, 101: flange, 2: drilling rig, 3: two-axis adjustable double-hole drill, 301: sleeve, 4: conveying frame, 5: mounting frame, 6: hydraulic rod, 7: screw, 8: clamping block, 801: clamping groove, 802: slide groove, 9: tightening frame, 10: positioning frame, 11: scale plate, 12: fixing rod, 13: stop block, 14: arc sleeve rod, 15: mounting groove, 16: observation line, 17: material guide frame, 171: material guide groove, 172: material guide hole. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0029] Example 1: A drilling device for producing a two-hole flat flange of an exhaust pipe, such as Figure 1-Figure 4As shown, it includes a drilling machine 1, a lifting drill rig 2 is installed in the middle of the top rear side of the drilling machine 1, and a two-axis adjustable double-hole drill 3 is installed on the upper front side of the drilling rig 2. The two-axis adjustable double-hole drill 3 includes an upper shell and two relatively independently rotating drill shaft units on the left and right sides of the lower part, and the drill shaft of each drill shaft unit is located in an eccentric position. When the left and right drill shaft units are controlled to rotate synchronously, the distance between the two eccentric drill shafts can be adjusted. A sleeve 301 is fixed on the drill shaft unit of the two-axis adjustable double-hole drill 3, and the eccentric drill shaft of the drill shaft unit passes downward from the inside of the adjacent sleeve 301, and the eccentric drill shaft is rotatably connected to the adjacent sleeve 301. A conveying frame 4 for conveying diamond flanges is fixed in the middle of the top of the drilling machine 1, and a mounting frame 5 is slidably connected to the middle of the drilling machine 1 along the front and rear directions. The mounting frame 5 is bolted A hydraulic rod 6 is fixedly connected and symmetrically distributed along the front and back of the mounting frame 5. The mounting frame 5 and the drilling machine 1 are tightened and fixed by a screw 7. The movable end of the hydraulic rod 6 is fixedly connected with a fixed clamping block 8. The conveying frame 4 is provided with a clamping groove 801 which is symmetrically distributed along the front and back of the conveying frame 4. The clamping block 8 passes through the adjacent clamping groove 801 and then clamps the flange 101 directly below the eccentric drill shaft of the two-axis adjustable double-hole drill 3. The conveying frame 4 is provided with a slide groove 802 which is symmetrically distributed along the front and back of the conveying frame 4. The flange 101 slides in along the left end of the slide groove 802 and slides out along the right end of the slide groove 802. The upper rear side of the mounting frame 5 is slidably connected to a position adjusting frame 10 in the up and down direction. The position adjusting frame 10 contacts the sleeve 301. The position adjusting frame 10 is slidably connected to a tightening frame 9 in the front and back direction. The tightening frame 9 is used to tighten the upper shell part of the two-axis adjustable double-hole drill 3.

[0030] To use this drilling device for producing two-hole flat flanges for exhaust pipes, the flange 101 to be drilled is first transported rightward from the left end of the conveyor frame 4 to directly below the drill spindle unit of the two-axis adjustable double-hole drill 3. The front and rear hydraulic rods 6 are then controlled to synchronously move the clamping blocks 8 to clamp the front and rear sides of the flange 101. The drilling rig 2 is then operated to lower the two-axis adjustable double-hole drill 3, drilling two holes in the flange 101. During this process, the two-axis adjustable double-hole drill 3, via the clamping frame 9, drives the adjustment frame 10 downward along the mounting frame 5. Subsequently, the two-axis adjustable double-hole drill 3 is raised, and the adjustment frame 10, via the clamping frame 9, slides upward along the mounting frame 5 to reset. The front and rear hydraulic rods 6 are then controlled to synchronously move the clamping blocks 8 in the opposite direction, releasing the flange 101. Finally, the two-hole flat flanges 101 are delivered rightward from the right end of the conveyor frame 4. This process is repeated to achieve mass production of two-hole flat flanges 101.

[0031] If the size of the next batch of flanges 101 changes, it is necessary to adaptively adjust the spacing between the drill shaft units of the two-axis adjustable double-hole drill 3 according to the size of the flange 101. Specifically: before the drilling operation, it is only necessary to synchronously rotate the drill shaft units of the two-axis adjustable double-hole drill 3 inward or outward to reduce or expand the spacing between the drill shaft units.

[0032] During the above-mentioned spacing adjustment process, the eccentric drill shaft of the drill shaft unit rotates and moves forward or backward. As a result, when the next batch of flanges 101 move to the bottom of the drill shaft unit, the flanges 101 are not directly under the eccentric drill shaft of the drill shaft unit, which causes the flanges 101 to be drilled offset. Therefore, further adjustment is required to automatically adjust the flanges 101 to be directly under the eccentric drill shaft of the drill shaft unit. The specific adjustment method is as follows:

[0033] First, loosen the screw 7 and push the adjustment frame 10 to move forward or backward adaptively relative to the clamping frame 9 until the adjustment frame 10 contacts the sleeve 301 outside the eccentric drill shaft of the adjusted drill shaft unit. During the movement and adjustment process, the adjustment frame 10 drives the mounting frame 5 to move forward or backward, and the mounting frame 5 drives the two hydraulic rods 6 thereon to move forward or backward synchronously. The hydraulic rods 6 drive the clamping blocks 8 thereon to move forward or backward synchronously, and the clamping blocks 8 on both sides are guaranteed not to cross the clamping groove 801 and enter the sliding groove 802 during the movement and adjustment process.

[0034] After the adjustment is completed, tighten the screw 7, and then transport the flange 101 to be drilled from the left end of the conveying frame 4 to the right between the two clamping blocks 8, and then control the hydraulic rods 6 on the front and rear sides to drive the clamping blocks 8 to move synchronously to the side close to the flange 101. The clamping block 8 that contacts the flange 101 first will push the flange 101 and then contact the clamping block 8 on the other side. At this time, the pushed and adjusted flange 101 is located directly below the drill shaft unit of the two-axis adjustable double-hole drill 3.

[0035] Therefore, the present invention only requires adjusting the distance between the drill spindles and the position of the clamping block 8 to ensure that the flange 101 is automatically aligned with the center of the drill spindle, avoiding the problem of offset drilling. The operation is simple and convenient. The punching operation can then be carried out. After the punching is completed, the two-hole flat flange 101 is continuously output to the right. During the rightward movement of the flange 101, its diamond-shaped side surface is squeezed by the right edge of the clamping groove 801 and is completely reset into the slide groove 802. It then slides rightward along the slide groove 802 and out of the right end of the conveyor frame 4.

[0036] Example 2: Based on Example 1, Figure 5-Figure 7As shown, it also includes a scale plate 11, a mounting groove 15 is opened on the side of the adjustment frame 10 close to the sleeve 301, the scale plate 11 is fixed in the mounting groove 15, and the front side of the adjustment frame 10 is fixed with a fixing rod 12 symmetrically distributed along the left and right sides of the adjustment frame 10, and a stopper 13 is slidably connected to the fixing rod 12 in the left and right directions, and the stopper 13 contacts the adjacent sleeve 301, and an arc-shaped sleeve rod 14 is fixed on the stopper 13, and the arc-shaped sleeve rod 14 is annularly buckled with the adjacent sleeve 301, and the front outer end surface of the mounting groove 15 protrudes from the scale plate 11, so that the scale plate 11 is completely embedded in the mounting groove 15, to prevent the scale plate 11 and the sleeve 301 from colliding with each other when the adjustment frame 10 contacts the sleeve 301, thereby causing the scale lines on the scale plate 11 to be worn. An observation line 16 is provided on the stopper 13, and the observation line 16 is used to indicate the scale lines on the scale plate 11.

[0037] When adjusting the spacing between the eccentric drill spindles of the two-axis adjustable dual-hole drill 3 drill spindle unit, the sleeve 301 outside the drill spindle unit drives the stopper 13 via the curved sleeve rod 14 to synchronously slide left or right along the fixed rod 12. By observing the observation lines 16 on the left and right stopper 13, the spacing between the eccentric drill spindles of the two-axis adjustable dual-hole drill 3 drill spindle unit after dynamic adjustment can be accurately measured, thereby improving the accuracy of the spacing between the two holes in the flange 101. In addition, the stopper 13 secures the sleeve 301 via the curved sleeve rod 14, achieving an interlocking effect between the drill spindle unit and the adjustment frame 10, preventing further deflection of the adjusted drill spindle unit. At the same time, the adjustment frame 10 will not move forward or backward at will before tightening the screw 7, further improving the accuracy of adjustment.

[0038] Example 3: Based on Example 2, Figure 3 、 Figure 8 and Figure 9 As shown, there is also a guide rack 17 for receiving and guiding cutting fluid and drilling waste. The guide rack 17 is fixedly connected to the drilling machine 1. During the drilling process, cutting fluid will be applied to cool and lubricate the drill shaft unit and the flange 101 workpiece. Excess cutting fluid and waste generated by drilling will fall into the guide rack 17. The guide rack 17 is low in the front and high in the back. A guide trough 171 is provided on the front side of the drilling machine 1. The guide rack 17 guides the cutting fluid flowing forward and downward into the guide trough 171 for collection and treatment. A guide hole 172 is provided at the bottom of the chute 802. In order to prevent the waste generated by drilling from splashing into the chute 802 and affecting the smooth transportation of the flange 101, a hole is dug at the bottom of the chute 802 so that the waste falls downward through the guide hole 172.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drilling device for producing a two-hole flat flange of an exhaust pipe, comprising a drilling machine (1), the drilling machine (1) being equipped with a lifting drilling rig (2), the drilling rig (2) being equipped with a two-axis adjustable double-hole drill (3), and the drilling machine (1) being fixedly connected with a conveying frame (4); It is characterized by: The two-axis adjustable double-hole drill (3) comprises an upper shell and two relatively independently rotating drill shaft units on the left and right sides of the lower shell, and the drill shaft of each drill shaft unit is located at an eccentric position. A sleeve (301) is fixedly connected to the drill shaft unit of the two-axis adjustable double-hole drill (3). A mounting frame (5) is slidably connected to the middle of the drilling machine (1). The mounting frame (5) is fixedly connected to hydraulic rods (6) symmetrically distributed along the mounting frame (5). The mounting frame (5) and the drilling machine (1) are fixed by screws (7). A clamping block (8) is fixedly connected to the movable end of the hydraulic rod (6). The hydraulic rod (6) drives the clamping block (8) thereon to move forward or backward synchronously. The conveying frame (4) is provided with a clamping groove (801) symmetrically distributed along the conveying frame (4), and the clamping block (8) passes through the adjacent clamping groove (801) and then clamps the flange (101) just below the two-axis adjustable double-hole drill (3). The conveying frame (4) is provided with a sliding groove (802) symmetrically distributed along the conveying frame (4), and the flange (101) slides in and out along the sliding groove (802). The mounting frame (5) is slidably connected to the adjusting frame (10), the adjusting frame (10) contacts the sleeve (301), and the adjusting frame (10) is slidably connected to the clamping frame (9) for clamping the two-axis adjustable double-hole drill (3).

2. A drilling device for producing a two-hole flat flange for an exhaust pipe according to claim 1, characterized in that: The invention also includes a scale plate (11), a mounting groove (15) is formed on one side of the position adjustment frame (10) close to the sleeve (301), the scale plate (11) is fixed in the mounting groove (15), the position adjustment frame (10) is fixed with fixed rods (12) symmetrically distributed along the position adjustment frame (10), the fixed rods (12) are slidably connected to the stoppers (13), and the stoppers (13) are in contact with the adjacent sleeves (301).

3. A drilling device for producing a two-hole flat flange for an exhaust pipe according to claim 2, characterized in that: It also includes an arc-shaped sleeve rod (14) corresponding to the stopper (13), the arc-shaped sleeve rod (14) is fixedly connected to the corresponding stopper (13), and the arc-shaped sleeve rod (14) is annularly buckled with the adjacent sleeve (301).

4. A drilling device for producing a two-hole flat flange for an exhaust pipe as claimed in claim 3, characterized in that: The outer end surface of the mounting groove (15) protrudes from the scale plate (11), so that the scale plate (11) is completely embedded in the mounting groove (15).

5. A drilling device for producing a two-hole flat flange for an exhaust pipe as claimed in claim 4, characterized in that: The stopper (13) is provided with an observation line (16), and the observation line (16) is used to indicate a scale line on the scale plate (11).

6. A drilling device for producing a two-hole flat flange for an exhaust pipe as claimed in claim 5, characterized in that: It also includes a material guide rack (17) for receiving and guiding cutting fluid and drilling waste, the material guide rack (17) is fixedly connected to the drilling machine (1), and a material guide groove (171) is provided on a side of the drilling machine (1) that is close to the material guide rack (17) and is tilted downward.

7. A drilling device for producing a two-hole flat flange for an exhaust pipe according to claim 6, characterized in that: A material guide hole (172) is formed at the bottom of the chute (802).

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