Drilling device and method for hard alloy processing

Abstract

The present invention provides a drilling device and method for cemented carbide processing, and relates to the technical field of cemented carbide processing. The drilling device for cemented carbide processing includes a machine platform, a movable workbench, a water baffle, a high-pressure water pump, a column, a processing head, a copper tube, an automatic chuck for clamping the copper tube, a feeding assembly for providing the copper tube, and a loading assembly for clamping the copper tube to realize loading onto the automatic chuck. In the present invention, the direction in which the copper tube is inserted into the automatic chuck is consistent with the direction of most electric spark perforators in the prior art. When applied to the transformation of existing equipment, it is only necessary to add a feeding assembly, a loading assembly, and a lower limit structure. The upper cover and the storage barrel are driven by a driving motor to rotate a stroke, so that the copper tube is discharged from the discharge hole. When loading, the entire length of the copper tube is clamped by a tube clamping rod and two sets of wear-resistant pads, which plays a very good fixing and guiding role, and realizes the role of automatic loading.

Description

Technical Field

[0001] The invention relates to the technical field of cemented carbide processing, in particular to a drilling device and method for cemented carbide processing. Background Art

[0002] Cemented carbide is an alloy material made from hard compounds of refractory metals and bonding metals through powder metallurgy. It has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance.

[0003] Cemented carbide is widely used in manufacturing cutting tools, knives, cobalt tools and wear-resistant parts in molds. Due to its hardness and brittleness, cemented carbide cannot be processed using conventional chip cutting. When processing wear-resistant parts in molds with plate-shaped cemented carbide materials, an EDM perforator is used to drill holes in the cemented carbide sheet by electro-corrosion, and then wires are threaded through the drilled holes to perform wire cutting to process the shape of the parts. Usually, large parts have multiple cavities that need to be processed, so multiple holes need to be drilled. The existing EDM perforator technology has developed to the point where it can realize the automatic movement of the sheet on the machine through programming to achieve drilling of different coordinates, but the perforator tool, that is, the copper tube, is a consumable. The copper tube is also corroded during drilling and needs to be replaced frequently. Currently, the replacement operation still needs to be installed manually;

[0004] There are also public technologies proposing a rotating clamping device and an automatic copper tube changing device for an electric spark punching machine, comprising a hollow rotating shaft, a driving assembly is arranged on the outside of the hollow rotating shaft, for driving the hollow rotating shaft to rotate; an elastic clamping head is arranged at the bottom of the hollow rotating shaft, a stop ring is threadedly connected to the outer side of the bottom of the hollow rotating shaft, the elastic clamping head passes through the stop ring, and the end of the elastic clamping head is pressed against the end of the hollow rotating shaft by the stop ring, a rubber water stop plug is arranged between the elastic clamping head and the hollow rotating shaft, a through hole is arranged at the center of the rubber water stop plug, the device improves the verticality of the copper tube when punching the tube and the speed of lowering the tube, and improves the accuracy of the punching; the rotating clamping device can not only realize the water tightness of the interior, but also realize the rotation of the rotating shaft and the clamping and loosening of the copper tube through a single driving power, thereby improving the compactness of the structure;

[0005] In this structure, in order to ensure the smooth insertion of the copper tube, the copper tube is loaded from the upper part of the machine head, which is inconsistent with the structure of most existing EDM perforators. If it is to be applied, major changes are required, and its copper tube supply mode is "the grabbing cylinder is located at the top of the copper tube drop bin, and the bundled copper tubes are clamped by the grabbing cylinder and lifted up several times and then released. Through repeated pulling and releasing, there will inevitably be a copper tube falling from the through hole of the second guide at the bottom of the copper tube drop bin, and then pulled by the lower drop mechanism". The diameter of the copper tube is usually small, and the commonly used specifications are 0.5mm, 0.8mm and 1mm. In order to drop only one copper tube each time, the through hole of the guide must be set close to the diameter of the copper tube, which makes it difficult for the above-mentioned feeding mode to smoothly make the copper tube fall from the through hole of the guide, resulting in the inability to carry out subsequent operations. For this reason, it is necessary to improve and optimize the drilling device and method for cemented carbide processing. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides a drilling device and method for cemented carbide processing, which solves the problem that the automatic feeding method of copper tubes in the prior art is inconsistent with the existing equipment and is not conducive to modification, and the problem that the copper tube feeding structure in the prior art is unreasonable.

[0008] (II) Technical solution

[0009] To achieve the above purpose, the present invention is implemented through the following technical solutions: a drilling device for cemented carbide processing, including a machine table, a movable workbench, a water baffle, a high-pressure water pump, a column, a processing head, a copper tube, an automatic chuck for clamping the copper tube, a feeding assembly for providing the copper tube, and a feeding assembly for clamping the copper tube to realize loading onto the automatic chuck, the processing head is arranged on the front wall of the column through a driving assembly, the automatic chuck is rotatably connected to the lower wall of the processing head, the front wall of the column and near the lower end of the column is fixedly connected with an eye template, the inner wall of the eye template is provided with a through hole that penetrates up and down, and the through hole is connected to the automatic The clamping centers of the chuck are opposite to each other up and down, and the feeding assembly is arranged on the left wall of the column through an upper support and a lower support. The feeding assembly includes a storage barrel, an upper cover, a lower cover and a lower limit structure. The upper cover is provided with a rotating drive structure for driving the upper cover to rotate, and a feeding structure is provided between the storage barrel, the upper cover and the lower cover. The feeding assembly includes a drive box, a lifting drive structure, a first slide, a left and right translation drive structure, a second slide, a pipe clamping rod for clamping the copper pipe and transferring it from the feeding assembly to the automatic chuck, and a clamping drive structure for driving the pipe clamping rod to move, and the clamping drive structure is connected to the pipe clamping rod through two sets of clamping blocks.

[0010] Preferably, the upper support and the lower support are distributed up and down and are fixedly connected to the left wall of the column in sequence. The top cross-sections of the upper support and the lower support are both L-shaped. The upper cover is rotatably connected to the lower wall of the upper support through a rotary drive structure and is located at the end away from the column. The lower cover is fixedly connected to the upper wall of the lower support and the top projections of the lower cover and the upper cover coincide. The material storage barrel is fixedly connected to the lower wall of the upper cover, and the end of the material storage barrel away from the upper cover is rotatably connected to the upper wall of the lower cover through a bearing.

[0011] Preferably, the feeding structure includes multiple groups of feeding holes, multiple groups of material storage holes and one group of discharge holes, the multiple groups of feeding holes are all arranged on the inner wall of the upper cover in a vertical through-shape, the multiple groups of feeding holes are equally distributed in a circle with the upper cover axis as the center, the multiple groups of material storage holes are all arranged on the annular inner wall of the material storage barrel in a vertical through-shape, the multiple groups of material storage holes are respectively opposite to the multiple groups of feeding holes in vertical direction, the discharge holes are arranged on the inner wall of the lower cover in a vertical through-shape, the discharge holes are opposite to the rightmost group of the multiple groups of feeding holes in a top view, and the inner diameters of the multiple groups of feeding holes, the multiple groups of material storage holes and the one group of discharge holes are all 1.2 times the diameter of the copper tube.

[0012] Preferably, the rotating drive structure is a drive motor, which is fixedly connected to the upper wall of the upper support and located at an end away from the column, the drive motor extension shaft passes through the inner wall of the upper support and extends to the bottom of the upper support, and the upper cover is fixedly connected to the end of the drive motor extension shaft and the axis of the upper cover is opposite to the axis of the drive motor.

[0013] Preferably, the lower limiting structure is a limiting plate, the limiting plate is fixedly connected to the left wall of the column and is located below the lower cover, and the limiting plate is a polytetrafluoroethylene plate.

[0014] Preferably, the lifting drive structure includes a first cylinder and two groups of first guide rods, the right wall of the column is fixedly connected with a side fixing plate, the driving box is fixedly connected to the side of the side fixing plate away from the column, the front wall of the driving box and the side away from the side fixing plate are provided with a slide groove, the first slide is slidably connected to the inner wall of the slide groove in a through-like manner, the two groups of the first guide rods are distributed front and back and are fixedly connected to the upper wall of the first slide in sequence and are both located inside the driving box, the ends of the two groups of the first guide rods away from the first slide both penetrate the upper wall of the driving box and are slidably connected thereto, the first cylinder is fixedly connected to the upper wall of the driving box and is located between the two groups of first guide rods, the end of the first cylinder extending shaft penetrates the upper wall of the driving box and extends into the driving box, and the end of the first cylinder extending shaft extending into the driving box is fixedly connected to the upper wall of the first slide.

[0015] Preferably, the left and right translation drive includes a second cylinder, two groups of sliders, and two groups of second guide rods. The second cylinder is fixedly connected to the upper wall of the first slide and is located on the front side of the drive box. The second cylinder extension shaft is arranged at the left end of the second cylinder and the extension line of the second cylinder extension shaft intersects and is perpendicular to the extension line of the automatic chuck axis. The second slide is fixedly connected to the end of the second cylinder extension shaft. The two groups of sliders are fixedly connected to the upper wall of the first slide and are respectively located on the front and rear sides of the second cylinder. The two groups of the second guide rods are fixedly connected to the right wall of the second slide and are respectively opposite to the left and right sides of the two groups of sliders. The ends of the two groups of the second guide rods away from the second slide respectively pass through the two groups of sliders. The second slide is slidably connected to the first slide through the two groups of sliders and the two groups of second guide rods.

[0016] Preferably, the clamping drive structure is a finger cylinder, which is fixedly connected to the upper wall of the second slide, and two groups of clamping fingers that can be opened and closed forward and backward are arranged at the left end of the finger cylinder. The two groups of clamping blocks are respectively fixedly connected to the opposite sides of the two groups of clamping fingers and are both located at the end of the clamping fingers away from the finger cylinder.

[0017] Preferably, the pipe clamping rod comprises two groups of semicircular rods, the two groups of semicircular rods are respectively fixedly connected between the opposite sides of the two groups of clamping blocks, a clamping hole which passes through from top to bottom is commonly provided between the opposite sides of the two groups of semicircular rods, the upper and lower ends of the semicircular rods are slidably connected with a group of semicircular ring sleeves, the circumferential outer walls of the two groups of semicircular rods and the connection between the opposite sides of the two groups of semicircular rods are provided with grooves, two groups of convex ribs are provided at the corresponding positions of the semicircular ring sleeves and the grooves, the semicircular ring sleeves are slidably connected to the semicircular rods through the convex ribs and the grooves, the upper wall and the lower wall of the clamping block are fixedly connected with two groups of mounting rods, and the four groups of One end of the mounting rod away from the clamping block passes through the inner walls of the two groups of semicircular ring sleeves respectively, and the end of the mounting rod extending into the interior of the semicircular ring sleeve is provided with a limit head to prevent the semicircular ring sleeve from falling off the mounting rod, and a spring is sleeved on the outer wall of the mounting rod and located between the clamping block and the opposite side of the semicircular ring sleeve. One end of the semicircular ring sleeve away from the clamping block is fixedly connected with a wear-resistant block, and two groups of wear-resistant blocks located at the same end of the four groups of wear-resistant blocks form a group of wear-resistant pads and the inner wall of the wear-resistant pad is provided with a guide hole that runs through from top to bottom, the inner diameter of the guide hole is 1.2 times the outer diameter of the copper tube, and the inner diameter of the clamping hole is 0.98 times the outer diameter of the copper tube.

[0018] According to the above-mentioned drilling method of a drilling device for cemented carbide processing, the drilling method comprises the following steps:

[0019] S1, material loading preparation, clamping the carbide material to be drilled on the wall of the mobile workbench, and placing copper tubes into multiple groups of storage holes whose current positions are not aligned with the discharge holes in the upper and lower directions through multiple groups of feeding holes;

[0020] S2, copper tube feeding, the second cylinder extends the shaft, driving the tube clamping rod to move to the left until the clamping hole in the tube clamping rod is aligned with the discharge hole up and down, at this time, the opposite sides of the two sets of wear-resistant pads are respectively slidably connected with the lower wall of the lower cover and the upper wall of the limit plate, and the finger cylinder is moved to drive the two sets of semicircular rods to separate until the clamping hole is separated to allow the copper tube to pass through, and the drive motor starts to rotate clockwise under the top projection, driving the upper cover and the storage barrel to rotate until the multiple groups of storage holes are displaced by a hole distance according to the pointer under the top projection, at this time, the copper tube inside the storage hole opposite to the discharge hole up and down falls down along the discharge hole into the clamping hole by its own weight, and then the finger cylinder action drives the two sets of semicircular rods to merge, and the copper tube is clamped through the clamping hole;

[0021] S3, copper tube loading, after the clamping rod clamps the copper tube, the second cylinder extends the shaft and retracts until the clamping hole is opposite to the axis of the automatic chuck up and down, the automatic chuck opens the chuck and is driven to move downward by the driving component, and after contacting the wear-resistant pad at the upper end of the clamping rod, the wear-resistant pad is squeezed to drive the corresponding two groups of semicircular rings to move downward along the outer wall of the clamping rod. At this time, the upper end of the copper tube gradually emerges from the upper guide hole. Through the continuous correction of the guide hole and the continuous descent of the automatic chuck, the upper end of the copper tube is inserted into the automatic chuck until the lower wall of the wear-resistant pad at the upper end of the clamping rod contacts the clamping rod, and the automatic chuck starts the clamping action to clamp the copper tube. At this time, the first cylinder starts and moves synchronously with the driving component to drive The automatic chuck and the pipe clamping rod move downward synchronously. During the downward movement, the wear-resistant pad at the lower end of the pipe clamping rod first contacts the eye template. Through the limit of the eye template, the wear-resistant pad at the lower end of the pipe clamping rod no longer moves, and the copper tube is clamped and driven by the pipe clamping rod and the automatic chuck to continue to move downward, and is guided through the guide hole in the wear-resistant pad at the lower end, so that the copper tube is inserted into the eye template hole on the inner wall of the eye template. When the lower end of the copper tube passes through the eye template hole, the driving assembly and the first cylinder stop moving, and the finger cylinder drives the two groups of semicircular rods to separate. After separation to the maximum opening stroke of the finger cylinder, the second cylinder extends the shaft and retracts, driving the two groups of separated semicircular rods to move to the right until the second cylinder extends the shaft to a fully retracted state.

[0022] S4, drilling processing, the cemented carbide material to be drilled is moved by the mobile workbench so that the coordinates of the hole to be drilled are aligned with the axis line of the automatic chuck, the power supply of the processing head, the rotation of the automatic chuck and the water supply of the high-pressure water pump are started, and the driving component drives the charged copper pipe to rotate and move downward, and the cemented carbide material to be drilled is subjected to electric spark drilling processing;

[0023] S5, copper tube replacement. When the copper tube in the automatic chuck is consumed to a length that cannot be processed further, the driving assembly drives the automatic chuck to rise, and the second cylinder drives the tube clamping rod to move to the bottom of the automatic chuck, clamps the old copper tube and pulls it out, and then repeats S2, S3, S4 and S5 until all holes are processed.

[0024] (III) Beneficial effects

[0025] The present invention provides a drilling device and method for hard alloy processing, which has the following beneficial effects:

[0026] 1. Compared with the prior art, the drilling device and method for cemented carbide processing has the same direction of inserting the copper tube into the automatic chuck as that of most electric spark perforators in the prior art. When applied to the modification of existing equipment, it only needs to add a feeding component, a loading component and a lower limit structure, which does not cause much damage to the original structure of the equipment and is conducive to promotion.

[0027] 2. Compared with the prior art, the drilling device and method for cemented carbide processing are provided with a storage barrel and an upper cover which can be driven to rotate by a driving motor, and storage holes and feeding holes are respectively provided in the storage barrel and the upper cover, and a group of discharge holes are provided in the lower cover. Copper tubes are added to all the storage holes before work to meet production needs. When the copper tube needs to be replaced, the upper cover and the storage barrel are driven by the driving motor to rotate a stroke, so that the copper tube is discharged from the discharge hole, so as to realize continuous operation and reduce the degree of manual participation.

[0028] 3. Compared with the prior art, the drilling device and method for cemented carbide processing, when loading, clamps the entire length of the copper tube through the tube clamping rod and two sets of wear-resistant pads, which plays a very good fixing and guiding role. When loading into the automatic chuck, the driving component drives the chuck to descend to form relative movement with the copper tube, thereby facilitating the insertion of the copper tube into the automatic chuck. When the copper tube is inserted into the eye template, the driving component and the first cylinder act synchronously to drive the copper tube to be inserted into the eye template, thereby realizing the effect of automatic loading. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0031] Figure 3 It is a partial cross-sectional view of the interior of the connection structure of the upper cover, the material storage barrel and the lower cover of the present invention;

[0032] Figure 4 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0033] Figure 5 For the present invention Figure 3 A partial enlarged view of point C in the middle;

[0034] Figure 6 It is a partial schematic diagram of the connection structure of the column, the drive box, the eye template and the feeding assembly of the present invention;

[0035] Figure 7 For the present invention Figure 6 A partial enlarged view of point D in the middle;

[0036] Figure 8 For the present invention Figure 6 A partial enlarged view of point E in the middle;

[0037] Fig. 9 It is a partial cross-sectional view of the top view of the semicircular rod and semicircular ring sleeve connection structure of the present invention.

[0038] Among them, 1. machine table; 2. water baffle; 3. column; 4. processing machine head; 5. automatic chuck; 6. upper support; 7. lower support; 8. storage barrel; 9. upper cover; 10. lower cover; 11. driving motor; 12. feeding hole; 13. storage hole; 14. discharge hole; 15. side fixing plate; 16. eye template; 17. driving box; 18. first guide rod; 19. first cylinder; 20. slide; 21. first slide; 22. slider; 23. second guide rod; 24. second slide; 25. second cylinder; 26. finger cylinder; 27. clamping block; 28. semicircular rod; 29. ​​groove; 30. mounting rod; 31. spring; 32. semicircular ring sleeve; 33. wear-resistant block; 34. guide hole; 35. clamping hole; 36. convex rib; 37. limit plate. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example

[0041] like Figures 1 to 9 As shown, an embodiment of the present invention provides a drilling device for cemented carbide processing, including a machine 1, a movable workbench, a water baffle 2, a high-pressure water pump, a column 3, a processing head 4, a copper tube, an automatic chuck 5 for clamping the copper tube, a feeding assembly for providing the copper tube, and a feeding assembly for clamping the copper tube to realize feeding to the automatic chuck 5. In this embodiment, the machine 1, the movable workbench, the water baffle 2, the high-pressure water pump, the column 3, and the processing head 4 are consistent with the existing electric spark perforating machine, and also include a control device for control not shown in the figure, a position sensor for confirming the accuracy of each action position, and a material sensor for confirming whether the material is in place. The above-mentioned control device and sensor are consistent with the structure and function in the prior art. If it involves the modification of the original equipment, it is only necessary to add a feeding assembly, a loading assembly and a lower limit structure to the left and right side walls of the column 3;

[0042] In order to facilitate the supply of copper tubes during the processing, the processing head 4 is arranged on the front wall of the column 3 through the driving assembly, the automatic chuck 5 is rotatably connected to the lower wall of the processing head 4, the front wall of the column 3 and the position close to the lower end of the column 3 is fixedly connected with an eye template 16, the inner wall of the eye template 16 is provided with a through hole that penetrates up and down, and the through hole is vertically opposite to the clamping center of the automatic chuck 5, and the feeding assembly is arranged on the left wall of the column 3 through the upper support 6 and the lower support 7, and the upper support 6 and the lower support 7 are vertically divided. The cloth is fixedly connected to the left wall of the column 3 in sequence. The upper support 6 and the lower support 7 are L-shaped in cross-section when viewed from above. The feeding assembly includes a storage barrel 8, an upper cover 9, a lower cover 10 and a lower limit structure. The upper cover 9 is rotatably connected to the lower wall of the upper support 6 through a rotating drive structure and is located at the end away from the column 3. The lower cover 10 is fixedly connected to the upper wall of the lower support 7 and the lower cover 10 overlaps with the upper cover 9 in a top view. The storage barrel 8 is fixedly connected to the lower wall of the upper cover 9. The end of the storage barrel 8 away from the upper cover 9 is rotated by a rotating drive structure. The bearing is rotatably connected to the upper wall of the lower cover 10. A feeding structure is arranged between the storage barrel 8, the upper cover 9 and the lower cover 10. The feeding structure includes multiple groups of feeding holes 12, multiple groups of storage holes 13 and a group of discharge holes 14. The multiple groups of feeding holes 12 are arranged on the inner wall of the upper cover 9 in a vertical through-type. The multiple groups of feeding holes 12 are equally distributed in a circle with the axis of the upper cover 9 as the center. The multiple groups of storage holes 13 are arranged on the annular inner wall of the storage barrel 8 in a vertical through-type. The multiple groups of storage holes 13 are respectively connected to the inner wall of the storage barrel 8. The multiple groups of feeding holes 12 are opposite to each other up and down, and the discharge holes 14 are arranged in the inner wall of the lower cover 10 in a vertical through shape. The discharge holes 14 are opposite to the rightmost group of the multiple groups of feeding holes 12 in a top view. The inner diameters of the multiple groups of feeding holes 12, the multiple groups of storage holes 13 and the group of discharge holes 14 are all 1.2 times the diameter of the copper tube. When preparing, the copper tube is put into the storage hole 13 through the feeding hole 12. The storage hole 13 can be hundreds of groups, which can meet the production needs of a shift;

[0043] In order to achieve the purpose of feeding, a rotating driving structure for driving the upper cover 9 to rotate is provided on the upper cover 9, and the rotating driving structure is a driving motor 11, which is fixedly connected to the upper wall of the upper support 6 and is located at an end away from the column 3. The extended shaft of the driving motor 11 passes through the inner wall of the upper support 6 and extends to the bottom of the upper support 6. The upper cover 9 is fixedly connected to the end of the extended shaft of the driving motor 11 and the axis of the upper cover 9 is opposite to the axis of the driving motor 11. The driving motor 11 can be a servo motor, which drives the upper cover 9 and the storage barrel 8 to rotate a stroke each time the control device is started, so that the copper tube located in the storage hole 13 is turned to the top of the discharge hole 14, so that the copper tube falls from the storage hole 13 and the discharge hole 14 so as to be obtained by the feeding assembly;

[0044] In order to position the copper tube downward when it is transferred from the discharge hole 14 to the upper feeding assembly, the lower limit structure is a limit plate 37, which is fixedly connected to the left wall of the column 3 and is located below the lower cover 10. The limit plate 37 is a polytetrafluoroethylene plate. The length of the copper tube is a standard length. When the copper tube falls, the copper tube is positioned downward by the limit plate 37 to ensure that the horizontal position of the copper tube is consistent each time the feeding assembly clamps the copper tube, thereby improving the accuracy of the operation;

[0045] In order to facilitate the left and right translation of the pipe clamping rod, the feeding assembly includes a drive box 17, a lifting drive structure, a first slide 21, a left and right translation drive structure, a second slide 24, a pipe clamping rod for clamping the copper tube and transferring it from the feeding assembly to the automatic chuck 5, and a clamping drive structure for driving the pipe clamping rod to move. The clamping drive structure is connected to the pipe clamping rod through two groups of clamping blocks 27. The left and right translation drive includes a second cylinder 25, two groups of sliders 22, and two groups of second guide rods 23. The second cylinder 25 is fixedly connected to the upper wall of the first slide 21 and is located on the front side of the drive box 17. The extension shaft of the second cylinder 25 is set at the left end of the second cylinder 25 and the extension line of the extension shaft of the second cylinder 25 is the same as the extension line of the axis of the automatic chuck 5. The lines intersect and are perpendicular, the second slide 24 is fixedly connected to the end of the shaft extending from the second cylinder 25, the two sets of sliders 22 are fixedly connected to the upper wall of the first slide 21 and are respectively located on the front and rear sides of the second cylinder 25, the two sets of second guide rods 23 are fixedly connected to the right wall of the second slide 24 and are respectively opposite to the left and right sides of the two sets of sliders 22, the ends of the two sets of second guide rods 23 away from the second slide 24 respectively penetrate the two sets of sliders 22, the second slide 24 is slidably connected to the first slide 21 through the two sets of sliders 22 and the two sets of second guide rods 23, and the extension and retraction of the shaft extending from the second cylinder 25 can drive the clamping rod to move back and forth between the initial stop position, below the automatic chuck 5 and below the feeding assembly;

[0046] In order to facilitate the clamping action of the copper tube, the clamping drive structure is a finger cylinder 26, which is fixedly connected to the upper wall of the second slide 24. Two groups of clamping fingers that can be opened and closed are arranged at the left end of the finger cylinder 26. Two groups of clamping blocks 27 are respectively fixedly connected to the opposite sides of the two groups of clamping fingers and are both located at the end of the clamping fingers away from the finger cylinder 26. When the two groups of clamping fingers on the finger cylinder 26 are opened and closed, they can drive the two groups of semicircular rods 28 to separate and close, thereby realizing the clamping action;

[0047] In order to achieve the clamping of the copper tube and the guiding effect when the copper tube is inserted into the automatic chuck 5 and the eye template 16, the tube clamping rod includes two groups of semicircular rods 28, and the two groups of semicircular rods 28 are respectively fixedly connected between the opposite sides of the two groups of clamping blocks 27. A clamping hole 35 that passes through the upper and lower ends of the semicircular rods 28 is commonly provided. A group of semicircular ring sleeves 32 are slidably connected to the upper and lower ends of the semicircular rods 28. A groove 29 is provided at the connection between the outer circumferential walls of the two groups of semicircular rods 28 and the opposite side between the two groups of semicircular rods 28. The semicircular ring sleeves Two groups of convex ribs 36 are arranged at positions corresponding to the groove 29, and the semicircular ring sleeve 32 is slidably connected to the semicircular rod 28 through the convex ribs 36 and the groove 29. The upper wall and the lower wall of the clamping block 27 are fixedly connected with two groups of mounting rods 30. The ends of the four groups of mounting rods 30 away from the clamping block 27 respectively penetrate the inner walls of the two groups of semicircular ring sleeves 32. The end of the mounting rod 30 extending into the interior of the semicircular ring sleeve 32 is provided with a limit head to prevent the semicircular ring sleeve 32 from falling off the mounting rod 30. The outer wall of the mounting rod 30 is located on the opposite side of the clamping block 27 and the semicircular ring sleeve 32. Springs 31 are sleeved between them, and one end of the semicircular ring sleeve 32 away from the clamping block 27 is fixedly connected with a wear-resistant block 33. Two groups of wear-resistant blocks 33 located at the same end of the four groups of wear-resistant blocks 33 form a group of wear-resistant pads, and the inner wall of the wear-resistant pads is provided with a guide hole 34 that penetrates up and down. The inner diameter of the guide hole 34 is 1.2 times the outer diameter of the copper tube, and the inner diameter of the clamping hole 35 is 0.98 times the outer diameter of the copper tube. When the clamping rod tube is located below the feeding assembly, the finger cylinder 26 drives the two groups of semicircular rods 28 to separate a certain distance, and the copper tube falls from the discharge hole 14. Enter the guiding hole 34 and the clamping hole 35, and then drive the two groups of semicircular rods 28 to merge through the finger cylinder 26 to clamp the copper tube. The upper and lower ends of the copper tube are respectively guided through the guiding holes 34 in the two groups of wear-resistant pads, and are in a sliding state with the wear-resistant pads. After the copper tube is clamped, it moves to the bottom of the automatic chuck 5. When the automatic chuck 5 moves downward through the driving assembly, it can squeeze the wear-resistant pad so that the semicircular ring sleeve 32 located above the clamping rod tube slides downward, and then gradually exposes the copper tube, so that the copper tube can enter the automatic chuck 5 more accurately;

[0048] In order to realize the action of inserting the copper tube into the eye template 16, the lifting drive structure includes a first cylinder 19 and two groups of first guide rods 18. The right wall of the column 3 is fixedly connected with the side fixing plate 15. The driving box 17 is fixedly connected to the side of the side fixing plate 15 away from the column 3. The front wall of the driving box 17 and the side away from the side fixing plate 15 are provided with a slide groove 20. The first slide 21 is slidably connected to the inner wall of the slide groove 20 in a penetrating manner. The two groups of first guide rods 18 are fixedly connected to the upper wall of the first slide 21 in a front-to-back distribution and are both located inside the driving box 17. The ends of the two groups of first guide rods 18 away from the first slide 21 are penetrated by the driving box 17. The first cylinder 19 is fixedly connected to the upper wall of the driving box 17 and is located between the two groups of first guide rods 18. The end of the shaft of the first cylinder 19 extends through the upper wall of the driving box 17 and extends into the interior of the driving box 17. The end of the shaft of the first cylinder 19 extending into the interior of the driving box 17 is fixedly connected to the upper wall of the first slide 21. After the upper end of the copper tube is inserted into the automatic chuck 5, the automatic chuck 5 starts the clamping action. After the automatic chuck 5 is clamped, the first cylinder 19 starts and moves synchronously with the driving assembly to drive the clamping rod tube and the copper tube to move toward the eye template 16, and gradually drives the copper tube to be inserted into the through hole in the eye template 16;

[0049] According to the above-mentioned drilling method of a drilling device for cemented carbide processing, the drilling method comprises the following steps:

[0050] S1, material loading preparation, clamp the carbide material to be drilled on the wall of the mobile workbench, and put the copper tube into the multiple groups of storage holes 13 whose current positions are not aligned with the discharge holes 14 in the upper and lower directions through the multiple groups of feeding holes 12;

[0051] S2, copper tube feeding, the second cylinder 25 extends the shaft, driving the tube clamping rod to move to the left until the clamping hole 35 in the tube clamping rod is aligned with the discharge hole 14 up and down, at this time, the opposite sides of the two sets of wear-resistant pads are respectively slidably connected with the lower wall of the lower cover 10 and the upper wall of the limit plate 37, and the finger cylinder 26 is operated to drive the two sets of semicircular rods 28 to separate until the clamping hole 35 is separated to allow the copper tube to pass through, and the drive motor 11 starts to rotate clockwise under the top projection, driving the upper cover 9 and the storage barrel 8 to rotate until the multiple groups of storage holes 13 are displaced by a hole distance according to the pointer under the top projection, at this time, the copper tube inside the storage hole 13 opposite to the discharge hole 14 up and down, falls down along the discharge hole 14 into the clamping hole 35 by its own weight, and then the finger cylinder 26 drives the two groups of semicircular rods 28 to merge, and the copper tube is clamped through the clamping hole 35;

[0052] S3, copper tube loading, after the clamping rod clamps the copper tube, the second cylinder 25 extends the shaft and retracts until the clamping hole 35 is vertically opposite to the axis of the automatic chuck 5, the automatic chuck 5 opens the chuck and is driven downward by the driving assembly, and after contacting the wear-resistant pad located at the upper end of the clamping rod, the corresponding two groups of semicircular ring sleeves 32 are driven to move downward along the outer wall of the clamping rod by squeezing the wear-resistant pad. At this time, the upper end of the copper tube is gradually exposed from the upper guide hole 34. Through the continuous correction of the guide hole 34 and the continuous descent of the automatic chuck 5, the upper end of the copper tube is inserted into the automatic chuck 5 until the lower wall of the wear-resistant pad located at the upper end of the clamping rod contacts the clamping rod, and the automatic chuck 5 starts the clamping action to clamp the copper tube. At this time, the first cylinder 19 is started and moves synchronously with the driving assembly to drive the automatic chuck 5. The clamping rod moves downward synchronously. During the downward movement, the wear pad at the lower end of the clamping rod first contacts the eye template 16. Through the limit of the eye template 16, the wear pad at the lower end of the clamping rod no longer moves, and the copper tube is clamped and driven by the clamping rod and the automatic chuck 5 to continue to move downward, and is guided through the guide hole 34 in the wear pad at the lower end, so that the copper tube is inserted into the eye mold hole located on the inner wall of the eye template 16. When the lower end of the copper tube passes through the eye mold hole, the driving assembly and the first cylinder 19 stop moving, and the finger cylinder 26 drives the two groups of semicircular rods 28 to separate. After separation to the maximum opening stroke of the finger cylinder 26, the second cylinder 25 extends the shaft and retracts, driving the two groups of separated semicircular rods 28 to move to the right until the second cylinder 25 extends the shaft and returns to the fully retracted state;

[0053] S4, drilling processing, the hard alloy material to be drilled is moved by the mobile workbench so that the coordinates of the hole to be drilled are aligned with the axis line of the automatic chuck 5, the processing head 4 is powered, the automatic chuck 5 is rotated, and the high-pressure water pump is supplied with water, and the driving component drives the charged copper tube to rotate and move downward, and the hard alloy material to be drilled is subjected to electric spark drilling processing;

[0054] S5, copper tube replacement. When the copper tube in the automatic chuck 5 is consumed to a length that cannot be processed further, the driving assembly drives the automatic chuck 5 to rise, and the second cylinder 25 drives the tube clamping rod to move to the bottom of the automatic chuck 5, clamps the old copper tube and pulls it out, and then repeats S2, S3, S4 and S5 until the hole processing is completed.

[0055] Working principle: In this embodiment, the machine 1, the mobile workbench, the water baffle 2, the high-pressure water pump, the column 3, and the processing head 4 are consistent with the existing EDM perforator, and also include a control device for control not shown in the figure, a position sensor for confirming the position accuracy of each action, and a material sensor for confirming whether the material is in place. The above control devices and sensors are consistent with the structure and function in the prior art. If it involves the modification of the original equipment, it is only necessary to add a feeding component, a loading component and a lower limit structure to the left and right side walls of the column 3. When preparing for work, through the feeding hole 1 2 copper tubes are put into the storage holes 13. Specifically, the storage holes 13 may be hundreds of groups, which can meet the production needs of one shift. The driving motor 11 may be a servo motor. Each time the control device is started, the upper cover 9 and the storage barrel 8 are driven to rotate by one stroke, so that the copper tubes in the storage holes 13 are transferred to the top of the discharge holes 14, so that the copper tubes fall from the storage holes 13 and the discharge holes 14 so as to be obtained by the feeding assembly. The lengths of the copper tubes are all standard lengths. When the copper tubes fall, the copper tubes are positioned downward by the limit plate 37 to ensure that the horizontal position is the same each time the feeding assembly clamps the copper tubes. The operation accuracy is improved. When the two groups of clamping fingers on the finger cylinder 26 are opened and closed, the two groups of semicircular rods 28 can be driven to separate and close, thereby realizing the clamping action. The inner diameter of the clamping hole 35 is 0.98 times the outer diameter of the copper tube. When the clamping rod tube is located below the feeding assembly, the finger cylinder 26 drives the two groups of semicircular rods 28 to separate a certain distance. After the copper tube falls from the discharge hole 14, it enters the guide hole 34 and the clamping hole 35. Then, the finger cylinder 26 drives the two groups of semicircular rods 28 to merge, thereby realizing the clamping of the copper tube. The upper and lower ends of the copper tube pass through the guide holes 34 in the two groups of wear-resistant pads respectively. The copper tube is guided and is in a sliding state with the wear-resistant pad. After being clamped, the copper tube moves to the bottom of the automatic chuck 5. When the automatic chuck 5 moves downward through the driving assembly, it can squeeze the wear-resistant pad so that the semicircular ring sleeve 32 located above the clamping rod tube slides downward, thereby gradually exposing the copper tube, so that the copper tube can enter the automatic chuck 5 more accurately. After the upper end of the copper tube is inserted into the automatic chuck 5, the automatic chuck 5 starts the clamping action. After the automatic chuck 5 is clamped, the first cylinder 19 starts and moves synchronously with the driving assembly to drive the clamping rod tube and the copper tube to move toward the eye template 16, and gradually drive the copper tube to be inserted into the through hole in the eye template 16.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drilling device for cemented carbide processing, characterized in that: The invention comprises a machine platform (1), a movable workbench, a water baffle (2), a high-pressure water pump, a column (3), a processing head (4), a copper tube, an automatic chuck (5) for clamping the copper tube, a feeding assembly for providing the copper tube, and a feeding assembly for clamping the copper tube to realize feeding to the automatic chuck (5), wherein the processing head (4) is arranged on the front wall of the column (3) through a driving assembly, the automatic chuck (5) is rotatably connected to the lower wall of the processing head (4), the front wall of the column (3) and a position close to the lower end of the column (3) are fixedly connected to an eye template (16), the inner wall of the eye template (16) is provided with a through hole which penetrates vertically, the through hole is vertically opposite to the clamping center of the automatic chuck (5), and the feeding assembly is connected to the automatic chuck (5) through an upper support ( 6) The lower support (7) is arranged on the left wall of the column (3), the feeding assembly comprises a material storage barrel (8), an upper cover (9), a lower cover (10) and a lower limit structure, the upper cover (9) is provided with a rotation drive structure for driving the upper cover (9) to rotate, a feeding structure is provided between the material storage barrel (8), the upper cover (9) and the lower cover (10), the feeding assembly comprises a drive box (17), a lifting drive structure, a first slide (21), a left and right translation drive structure, a second slide (24), a pipe clamping rod for clamping the copper pipe and transferring it from the feeding assembly to the automatic chuck (5), and a clamping drive structure for driving the pipe clamping rod to move, and the clamping drive structure is connected to the pipe clamping rod through two groups of clamping blocks (27); The lifting drive structure comprises a first cylinder (19) and two groups of first guide rods (18); the right wall of the column (3) is fixedly connected to a side fixing plate (15); the drive box (17) is fixedly connected to a side of the side fixing plate (15) away from the column (3); a slide groove (20) is provided on the front wall of the drive box (17) and located on a side away from the side fixing plate (15); the first slide table (21) is slidably connected to the inner side wall of the slide groove (20) in a through-shaped manner; the two groups of the first guide rods (18) are fixedly connected to the first slide table (21) in a front-back distributed manner in sequence. ) upper wall and are both located inside the drive box (17); one end of the two groups of the first guide rods (18) away from the first slide (21) penetrates the upper wall of the drive box (17) and is slidably connected thereto; the first cylinder (19) is fixedly connected to the upper wall of the drive box (17) and is located between the two groups of the first guide rods (18); the end of the first cylinder (19) extending out of the shaft penetrates the upper wall of the drive box (17) and extends into the interior of the drive box (17); the end of the first cylinder (19) extending out of the shaft extending into the interior of the drive box (17) is fixedly connected to the upper wall of the first slide (21); The left-right translation drive comprises a second cylinder (25), two sets of slide blocks (22), and two sets of second guide rods (23). The second cylinder (25) is fixedly connected to the upper wall of the first slide table (21) and is located in front of the drive box (17). The extension axis of the second cylinder (25) is arranged at the left end of the second cylinder (25) and the extension line of the extension axis of the second cylinder (25) intersects and is perpendicular to the extension line of the axis of the automatic chuck (5). The second slide table (24) is fixedly connected to the end of the extension axis of the second cylinder (25). The two sets of The sliders (22) are fixedly connected to the upper wall of the first slide (21) and are respectively located at the front and rear sides of the second cylinder (25); the two sets of the second guide rods (23) are fixedly connected to the right wall of the second slide (24) and are respectively opposite to the left and right sides of the two sets of sliders (22); the ends of the two sets of the second guide rods (23) away from the second slide (24) respectively penetrate the two sets of sliders (22); the second slide (24) is slidably connected to the first slide (21) through the two sets of sliders (22) and the two sets of the second guide rods (23); The clamping drive structure is a finger cylinder (26), the finger cylinder (26) is fixedly connected to the upper wall of the second slide (24), two groups of clamping fingers that can be opened and closed forward and backward are arranged at the left end of the finger cylinder (26), and the two groups of clamping blocks (27) are respectively fixedly connected to the opposite sides of the two groups of clamping fingers and are both located at the end of the clamping fingers away from the finger cylinder (26); The pipe clamping rod comprises two groups of semicircular rods (28), the two groups of semicircular rods (28) are respectively fixedly connected between opposite sides of two groups of clamping blocks (27), a clamping hole (35) penetrating from top to bottom is commonly provided between the opposite sides of the two groups of semicircular rods (28), a group of semicircular ring sleeves (32) are slidably connected to the upper and lower ends of the semicircular rods (28), a groove (29) is provided at the connection between the circumferential outer walls of the two groups of semicircular rods (28) and the opposite sides of the two groups of semicircular rods (28), two groups of convex ribs (36) are provided at positions corresponding to the grooves (29), the semicircular ring sleeves (32) are slidably connected to the semicircular rods (28) via the convex ribs (36) and the grooves (29), the upper and lower walls of the clamping blocks (27) are fixedly connected to the two groups of mounting rods (30), and the four groups of mounting rods (30) are fixedly connected to the upper and lower walls of the clamping blocks (27). One end of the mounting rod (30) away from the clamping block (27) passes through the inner walls of the two groups of semicircular ring sleeves (32), and one end of the mounting rod (30) extending into the semicircular ring sleeve (32) is provided with a limit head for preventing the semicircular ring sleeve (32) from falling off the mounting rod (30). A spring (31) is sleeved on the outer wall of the mounting rod (30) and located between the clamping block (27) and the opposite side of the semicircular ring sleeve (32). One end of the semicircular ring sleeve (32) away from the clamping block (27) is fixedly connected with a wear-resistant block (33). Two groups of wear-resistant blocks (33) located at the same end of the four groups of wear-resistant blocks (33) form a group of wear-resistant pads, and the inner wall of the wear-resistant pad is provided with a guide hole (34) that penetrates from top to bottom, the inner diameter of the guide hole (34) is 1.2 times the outer diameter of the copper tube, and the inner diameter of the clamping hole (35) is 0.98 times the outer diameter of the copper tube.

2. A drilling device for cemented carbide processing according to claim 1, characterized in that: The upper support (6) and the lower support (7) are arranged vertically and are fixedly connected to the left wall of the column (3) in sequence. The upper support (6) and the lower support (7) are both L-shaped in top view. The upper cover (9) is rotationally connected to the lower wall of the upper support (6) through a rotary drive structure and is located at an end away from the column (3). The lower cover (10) is fixedly connected to the upper wall of the lower support (7) and the top view projections of the lower cover (10) and the upper cover (9) overlap. The material storage barrel (8) is fixedly connected to the lower wall of the upper cover (9), and the end of the material storage barrel (8) away from the upper cover (9) is rotationally connected to the upper wall of the lower cover (10) through a bearing.

3. A drilling device for cemented carbide processing according to claim 2, characterized in that: The feeding structure comprises a plurality of groups of feeding holes (12), a plurality of groups of material storage holes (13) and a group of material discharge holes (14). The plurality of groups of feeding holes (12) are arranged on the inner wall of the upper cover (9) in a vertically through-going shape. The plurality of groups of feeding holes (12) are equally distributed on the circumference with the axis of the upper cover (9) as the center. The plurality of groups of material storage holes (13) are arranged on the annular inner wall of the material storage barrel (8) in a vertically through-going shape. The plurality of groups of material storage holes (13) are respectively opposite to the plurality of groups of feeding holes (12) in vertically through-going shape. The material discharge holes (14) are arranged on the inner wall of the lower cover (10) in a vertically through-going shape. The material discharge holes (14) are opposite to the rightmost group of the plurality of feeding holes (12) in a top view. The inner diameters of the plurality of groups of feeding holes (12), the plurality of groups of material storage holes (13) and the group of material discharge holes (14) are all 1.2 times the diameter of the copper tube.

4. A drilling device for cemented carbide processing according to claim 3, characterized in that: The rotary drive structure is a drive motor (11), the drive motor (11) is fixedly connected to the upper wall of the upper support (6) and is located at an end away from the column (3), the extended shaft of the drive motor (11) passes through the inner wall of the upper support (6) and extends to the bottom of the upper support (6), the upper cover (9) is fixedly connected to the end of the extended shaft of the drive motor (11), and the axis of the upper cover (9) is opposite to the axis of the drive motor (11).

5. A drilling device for cemented carbide processing according to claim 4, characterized in that: The lower limiting structure is a limiting plate (37), the limiting plate (37) is fixedly connected to the left wall of the column (3) and is located below the lower cover (10), and the limiting plate (37) is a polytetrafluoroethylene plate.

6. The drilling method of a drilling device for cemented carbide processing according to claim 5, characterized in that: The drilling method comprises the following steps: S1, material loading preparation, clamping the hard alloy material to be drilled on the wall of the movable workbench, and placing copper tubes into multiple groups of storage holes (13) whose current positions are not aligned with the discharge holes (14) in the upper and lower directions through multiple groups of feeding holes (12); S2, copper tube feeding, the second cylinder (25) extends the shaft, driving the clamping rod to move leftward until the clamping hole (35) in the clamping rod is aligned with the discharge hole (14) up and down. At this time, the two sets of wear-resistant pads are slidably connected to the lower wall of the lower cover (10) and the upper wall of the limit plate (37) on the opposite side, and the finger cylinder (26) is actuated to drive the two sets of semicircular rods (28) to separate until the clamping hole (35) is separated to allow the copper tube to pass through, and the drive motor (11) is started. The upper cover (9) and the material storage barrel (8) rotate clockwise in the top view, driving the upper cover (9) and the material storage barrel (8) to rotate until the plurality of material storage holes (13) are displaced by one hole pitch in the clockwise direction in the top view. At this time, the copper tube inside the material storage hole (13) opposite to the discharge hole (14) falls downward along the discharge hole (14) to the inside of the clamping hole (35) by its own weight, and then the finger cylinder (26) drives the two groups of semicircular rods (28) to merge, and the copper tube is clamped through the clamping hole (35); S3, copper tube loading, after the clamping rod clamps the copper tube, the second cylinder (25) extends the shaft and retracts until the clamping hole (35) and the axis of the automatic chuck (5) are opposite to each other in vertical direction, the automatic chuck (5) opens the chuck and is driven downward by the driving assembly, and after contacting the wear-resistant pad located at the upper end of the clamping rod, the corresponding two groups of semicircular ring sleeves (32) are driven to move downward along the outer wall of the clamping rod by squeezing the wear-resistant pad. At this time, the upper end of the copper tube gradually emerges from the upper guide hole (34). Through the continuous correction of the guide hole (34) and the continuous descent of the automatic chuck (5), the upper end of the copper tube is inserted into the automatic chuck (5) until the lower wall of the wear-resistant pad located at the upper end of the clamping rod contacts the clamping rod, and the automatic chuck (5) starts the clamping action to clamp the copper tube. At this time, the first cylinder 19 starts and moves synchronously with the driving assembly to drive the automatic chuck (5). , the pipe clamping rod moves downward synchronously. During the downward movement, the wear-resistant pad at the lower end of the pipe clamping rod first contacts the eye template (16). Due to the limit of the eye template (16), the wear-resistant pad at the lower end of the pipe clamping rod no longer moves, and the copper tube is clamped and driven by the pipe clamping rod and the automatic clamp (5) to continue to move downward, and is guided through the guide hole (34) in the wear-resistant pad at the lower end, so that the copper tube is inserted into the eye template hole located on the inner wall of the eye template (16). When the lower end of the copper tube passes through the eye template hole, the drive assembly and the first cylinder (19) stop moving, and the finger cylinder (26) drives the two groups of semicircular rods (28) to separate. After separation to the maximum opening stroke of the finger cylinder (26), the second cylinder (25) extends the shaft and retracts, driving the two groups of separated semicircular rods (28) to move to the right until the second cylinder (25) extends the shaft and returns to the fully retracted state; S4, drilling processing, driving the cemented carbide material to be drilled to move by moving the workbench so that the coordinates of the hole to be drilled are aligned with the axis of the automatic chuck (5) up and down, starting the processing head (4) to power, the automatic chuck (5) to rotate, and the high-pressure water pump to supply water, and the driving component drives the charged copper tube to rotate and move downward, and the cemented carbide material to be drilled is subjected to electric spark drilling processing; S5, copper tube replacement. When the copper tube in the automatic chuck (5) is consumed to a length that cannot be processed further, the driving assembly drives the automatic chuck (5) to rise, and the second cylinder (25) drives the tube clamping rod to move to the bottom of the automatic chuck (5), clamps the old copper tube and pulls it out, and then repeats S2, S3, S4 and S5 until all holes are processed.

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