Induction coil water spraying hole machining device

Abstract

The utility model discloses an induction coil water spraying hole machining device which comprises a workbench provided with a bench drill, a clamp used for placing an induction coil drill hole is arranged at the end, away from the bench drill, of the workbench, and the clamp comprises a guide rail frame, a supporting plate base and a supporting plate. The guide rail frame is horizontally distributed on the top surface of the workbench, the supporting plate base is slidably connected with the guide rail frame, and a horizontal position adjusting mechanism connected with the supporting plate base is arranged at the end, away from the bench drill, of the guide rail frame. The lower portion of the supporting plate is hinged to the supporting plate base, and an angle adjusting mechanism connected with the supporting plate is arranged at the end, away from the bench drill, of the supporting plate base. A horizontally-distributed guide groove is formed in the lower portion of the supporting plate in a penetrating mode, and two rotary supporting mechanisms used for supporting the induction coil to drill water spraying holes are symmetrically installed in the guide groove. According to the utility model, the angles of the water spraying holes are consistent and the distance between every two adjacent water spraying holes is the same when the induction coil is drilled, so that the manufacturing efficiency of the induction coil is greatly improved, and the stable quality of a quenched product is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of induction coil processing equipment, in particular to an induction coil water spraying hole processing device. Background Technique

[0002] Surface induction hardening is a common quenching method in heat treatment. The main basis of induction heating is three basic principles: electromagnetic induction, skin effect, and heat conduction. During quenching, the workpiece is placed in an induction coil made of copper pipe. The induction coil is connected to a high-frequency alternating current power supply. By passing a certain frequency alternating current into the induction coil through the power supply, an alternating magnetic field with the same frequency will be generated around the induction coil. Then, an induction current with the same frequency will be generated in the workpiece. This current forms a loop in the workpiece, called eddy current. This eddy current can convert electrical energy into heat energy to heat the workpiece. The distribution of eddy current in the workpiece is uneven, with a large density on the surface and a small density at the core. The higher the frequency of the current passed into the induction coil, the thinner the surface layer where the eddy current is concentrated. This phenomenon is called the skin effect. Due to the skin effect, the surface of the workpiece is quickly heated to the quenching temperature, and then cooled by spraying water. The surface of the workpiece is hardened.

[0003] In production, different induction coils are usually made according to the shape and processing parts of the workpiece. The most commonly used is the circular induction coil. The induction coil used for surface induction hardening of larger cylindrical workpieces is usually made of square copper pipe. Since the induction heating speed is very fast, the surface of the workpiece can reach the quenching temperature in 1 - 2 seconds. Therefore, the heating and cooling of surface induction hardening are almost synchronous. In order to achieve the effect of timely cooling, usually, water spraying holes are arranged below the induction coil facing the workpiece direction. Such a design can not only achieve the effect of timely cooling of the workpiece but also play a role in cooling the induction coil.

[0004] When making the induction coil, it is usually required that the diameter of the water spraying hole is 1.2 - 1.8 mm, the water spraying direction of the water spraying hole forms a 45° angle with the radial normal of the workpiece, the water spraying holes are evenly distributed, and the edge distance between two adjacent water spraying holes is usually 2 - 5 mm.

[0005] Currently, the conventional method is that when making the coil, the coil maker usually relies on experience to place the coil on an iron block with a triangular groove and hold it by hand to drill holes. Such an operation is very difficult to ensure that the angles of each drilled water spraying hole are the same, the difference in the distance between holes is also large, and the production efficiency is very low. Moreover, due to the different angles of each water spraying hole and the uneven distribution of water spraying holes, defects such as insufficient hardness, soft spots, and soft bands often appear after quenching.

[0006] Therefore, there is an urgent need for a special induction coil making fixture that can ensure the same angle and uniform distribution of the water spraying holes of the made induction coil to ensure that the processed products have high quality. Content of the Utility Model

[0007] The purpose of the present utility model is to provide a processing device for the water spraying holes of an induction coil, which can ensure that the angles of the water spraying holes are consistent when drilling the induction coil, and the distances between every two adjacent water spraying holes are the same, ensuring the stable quality of the quenching products, improving the manufacturing efficiency of the induction coil, and well solving the problems mentioned in the above background art.

[0008] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0009] A processing device for the water spraying holes of an induction coil includes a workbench provided with a bench drill. At one end of the workbench far from the bench drill, there is a fixture for placing the induction coil to be drilled. The fixture includes a guide rail frame, a support plate seat and a support plate. The guide rail frame is horizontally distributed on the top surface of the workbench. The support plate seat is slidably connected with the guide rail frame. At one end of the guide rail frame far from the bench drill, there is a horizontal position adjusting mechanism connected with the support plate seat. The lower part of the support plate is hinged with the support plate seat. At one end of the support plate seat far from the bench drill, there is an angle adjusting mechanism connected with the support plate. Horizontally distributed guide grooves are provided through the lower part of the support plate, and two rotating support mechanisms for supporting the induction coil to drill the water spraying holes are symmetrically installed in the guide grooves.

[0010] Further, the guide rail frame includes two guide rails made of channel steel and symmetrically distributed. A connecting plate is fixedly connected between the two guide rails. The support plate seat includes two symmetrically distributed angle irons and a plurality of parallelly distributed mounting shafts. The mounting shafts are fixed between the two angle irons, and rollers connected with the guide rails are respectively provided at both ends of each mounting shaft.

[0011] Further, a limiting hole is provided at one end of the guide rail close to the bench drill, and a limiting pin is inserted into the limiting hole.

[0012] Further, a locking mechanism is provided between the guide rail and the angle iron. The locking mechanism includes a first threaded sleeve located on the guide rail and a locking bolt threadedly connected with the first threaded sleeve. The locking bolt is vertically distributed with respect to the guide rail.

[0013] Further, the horizontal position adjusting mechanism includes a rear angle iron, a rear baffle and an adjusting screw. The adjusting screw is distributed along the length direction of the guide rail frame. Both ends of the rear angle iron are respectively fixedly connected with the two angle irons. The rear angle iron is provided with a second threaded sleeve threadedly connected with the adjusting screw. A hand wheel is fixedly connected to the end of the adjusting screw far from the rear angle iron. Both ends of the rear baffle are respectively fixedly connected with the two guide rails. The rear baffle is provided with a U-shaped groove for embedding the adjusting screw, and limiting plates are respectively fixedly provided on both sides of the adjusting screw on the rear baffle.

[0014] Further, the angle adjustment mechanism includes a threaded rod and a sleeve that are slidably connected. One end of the sleeve away from the threaded rod is fixedly connected to a first rotating shaft vertically distributed. The support plate is fixedly provided with a first shaft sleeve rotatably connected to the first rotating shaft. One end of the threaded rod away from the sleeve is fixedly connected to a second rotating shaft vertically distributed. The support plate base is fixedly provided with a second shaft sleeve rotatably connected to the second rotating shaft. The threaded rod is equipped with an adjusting nut.

[0015] Further, the rotating support mechanism includes a rotating member and a bolt-nut assembly. The rotating member is rotatably installed in the guiding groove through the bolt-nut assembly.

[0016] Further, a third shaft sleeve is provided at the lower part of the support plate, and the support plate base is provided with a third rotating shaft rotatably connected to the third shaft sleeve.

[0017] Further, the upper surface of the support plate is provided with a center line distributed along the length direction and a positioning line spaced a certain distance from the center line.

[0018] Further, the center line and the central axis of the drill bit of the bench drill are located in the same vertical plane.

[0019] Compared with the prior art, the present utility model provides an induction coil water spray hole processing device, which has the following beneficial effects:

[0020] The present utility model can adjust and change the angle of the support plate through the angle adjustment mechanism, and can adjust and change the horizontal position of the support plate through the horizontal position adjustment mechanism, so that the induction coil is facing the drill bit of the bench drill at an inclined angle of 45 degrees; since two symmetrical rotating support mechanisms are used to support the induction coil, stable drilling can be carried out, and after each water spray hole is drilled, it can be rotated very conveniently to continue drilling the next water spray hole. The present utility model can ensure that the angles of the water spray holes are consistent when drilling the induction coil and the distances between every two adjacent water spray holes are the same, greatly improving the production efficiency of the induction coil and ensuring the stable quality of the quenched products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic side view structure diagram of the present utility model;

[0023] Figure 2 It is a three-dimensional structure diagram of the fixture of the present utility model;

[0024] Figure 3 A schematic diagram for adjusting the angle of the support plate;

[0025] Figure 4 A schematic diagram for adjusting the horizontal position of the pallet;

[0026] Figure 5 It is an exploded view of the parts of the fixture of the utility model;

[0027] Figure 6 A schematic diagram of rotating the induction coil on the pallet;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating support mechanism.

[0029] Figure numerals: 1, guide rail frame; 11, guide rail; 111, limit hole; 12, connecting plate; 13, limit pin; 2, support plate seat; 21, angle iron; 22, mounting shaft; 23, roller; 24, third rotating shaft; 3, support plate; 31, guide groove; 32, center line; 33, positioning line; 34, third shaft sleeve; 4, horizontal position adjustment mechanism; 41, rear angle iron; 42, rear baffle; 43, adjustment screw; 44, second threaded sleeve; 45, hand wheel; 46, U-shaped groove; 47, limit Plate; 5. Angle adjustment mechanism; 51. Threaded rod; 52. Sleeve; 53. First rotating shaft; 54. First shaft sleeve; 55. Second rotating shaft; 56. Second shaft sleeve; 57. Adjusting nut; 6. Rotating support mechanism; 61. Rotating member; 62. Bolt and nut assembly; 63. Washer; 7. Locking mechanism; 71. First threaded sleeve; 72. Locking bolt; 8. Bench drill; 81. Drill bit; 82. Handle; 9. Induction coil; 91. Positioning plane; 92. Water spray hole; 10. Workbench. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Please refer to Figures 1 to 7, this embodiment provides a processing device for the water spray holes of an induction coil, which includes a workbench 10 provided with a bench drill 8. At one end of the workbench 10 away from the bench drill 8, there is a fixture for placing the induction coil 9 to drill holes. The fixture includes a guide rail frame 1, a support plate seat 2, and a support plate 3; the guide rail frame 1 is horizontally distributed on the top surface of the workbench 10, the support plate seat 2 is slidably connected to the guide rail frame 1, and at one end of the guide rail frame 1 away from the bench drill 8, there is a horizontal position adjustment mechanism 4 connected to the support plate seat 2; the lower part of the support plate 3 is hinged to the support plate seat 2, and at one end of the support plate seat 2 away from the bench drill 8, there is an angle adjustment mechanism 5 connected to the support plate 3; a horizontally distributed guide groove 31 is provided through the lower part of the support plate 3, and two rotation support mechanisms 6 for supporting the induction coil 9 to drill the water spray holes 92 are symmetrically installed in the guide groove 31. The angle of the support plate can be adjusted and changed through the angle adjustment mechanism, and the horizontal position of the support plate can be adjusted and changed through the horizontal position adjustment mechanism, so that the induction coil faces the drill bit of the bench drill at an inclined angle of 45 degrees; since two symmetrical rotation support mechanisms are used to support the induction coil, the drilling can be stabilized, and after each water spray hole is drilled, it can be rotated conveniently to continue drilling the next water spray hole. In this way, it can ensure that the angles of the water spray holes are consistent when drilling the induction coil and the distance between every two adjacent water spray holes is the same, greatly improving the production efficiency of the induction coil and ensuring the stable quality of the quenching products.

[0032] In some specific embodiments, referring to Figures 1 to 5 , the guide rail frame 1 includes two guide rails 11 made of channel steel and symmetrically distributed. A connecting plate 12 is fixedly connected by welding between the two guide rails 11. The support plate seat 2 includes two angle irons 21 symmetrically distributed and several parallel installation shafts 22. The installation shafts 22 are fixedly welded between the two angle irons 21, and rollers 23 connected to the guide rails 11 are respectively provided at both ends of each installation shaft 22. As an example, the rollers 23 adopt rolling bearings.

[0033] As an improved embodiment, referring to Figures 1 to 5 , at one end of the guide rail 11 close to the bench drill 8, there is a circular limit hole 111, and a limit pin 13 is inserted into the limit hole 111. Since the limit pin is inserted, the support plate seat can be limited to prevent it from sliding out. As an example, the limit pin 13 adopts a bolt.

[0034] As an improved embodiment, referring to Figures 1 to 5 , a locking mechanism 7 is provided between the guide rail 11 and the angle iron 21. The locking mechanism 7 includes a first threaded sleeve 71 located on the guide rail 11 and a locking bolt 72 threadedly connected to the first threaded sleeve 71. The locking bolt 72 is vertically distributed with respect to the guide rail 11. By turning the locking bolt, the support plate seat can be locked with the guide rail frame.

[0035] In some specific embodiments, referring to Figures 1 to 5 , the horizontal position adjusting mechanism 4 includes a rear angle iron 41, a rear baffle 42 and an adjusting screw 43. The adjusting screw 43 is distributed along the length direction of the guide rail frame 1. Both ends of the rear angle iron 42 are fixedly connected to the two angle irons 41 by welding. The rear angle iron 41 is provided with a second threaded sleeve 44 threadedly connected to the adjusting screw 43. A hand wheel 45 is fixedly connected to one end of the adjusting screw 43 away from the rear angle iron 41. Both ends of the rear baffle 42 are fixedly connected to the two guide rails 11 by welding. The rear baffle 42 is provided with a U-shaped groove 46 for fitting the adjusting screw 43. The adjusting screw 43 is fixedly welded with limiting plates 47 respectively located on both sides of the rear baffle 42. By turning the hand wheel, the adjusting screw can be driven to rotate, so as to drive the support plate seat to move forward or backward along the guide rail, so as to facilitate aligning the positioning plane where the water spraying holes need to be drilled on the induction coil with the drill bit on the bench drill.

[0036] In some specific embodiments, referring to Figures 1 to 5 , the angle adjusting mechanism 5 includes a threaded rod 51 and a sleeve 52 which are slidably connected. A first rotating shaft 53 vertically distributed is fixedly connected to one end of the sleeve 52 away from the threaded rod 51. The support plate 3 is fixedly provided with a first shaft sleeve 54 rotatably connected to the first rotating shaft 53. A second rotating shaft 55 vertically distributed is fixedly connected to one end of the threaded rod 51 away from the sleeve 52. The support plate seat 2 is fixedly provided with a second shaft sleeve 56 rotatably connected to the second rotating shaft 55. An adjusting nut 57 is installed on the threaded rod 51. Since the sleeve is inserted and connected with the threaded pipe and the sleeve is supported by the adjusting nut on the threaded pipe, the length distance of the threaded pipe inserted into the sleeve can be changed by twisting the adjusting nut, so as to realize the adjustment of the inclination angle of the support plate.

[0037] In some specific embodiments, referring to Figures 1 to 7 , the rotating support mechanism 6 includes a rotating member 61 and a bolt-nut assembly 62. The rotating member 61 is rotatably installed in the guide groove 31 through the bolt-nut assembly 62. As an example, the rotating member 61 adopts a rolling bearing, and washers 63 are sleeved on both sides of the rotating member 61. Since two symmetrical rotating members are used to support the induction coil, drilling can be carried out stably, and it is very convenient to rotate and continue to drill the next water spraying hole after each water spraying hole is drilled.

[0038] In some specific embodiments, referring to Figure 1 、 Figure 3 、 Figure 5 , a third shaft sleeve 34 is provided at the lower part of the support plate 3, and the support plate seat 2 is provided with a third rotating shaft 24 rotatably connected to the third shaft sleeve 34.

[0039] In some specific embodiments, referring to Figure 2 and Figure 6 , a center line 32 distributed along the length direction and a positioning line 33 spaced a certain distance from the center line 32 are provided on the upper surface of the pallet 3. As an example, the distance between the positioning line 33 and the center line 32 is 2-5 mm.

[0040] In some specific embodiments, the center line 32 and the central axis of the drill bit 81 of the bench drill 8 are located in the same vertical plane. In this way, by simply aligning the drill bit on the bench drill with the center line on the pallet, precise drilling of each water spray hole can be achieved.

[0041] Referring to Figures 1 to 7 , the manufacturing process of the induction coil will be specifically introduced below.

[0042] I. Preparation

[0043] 1. Select a suitable square copper tube to manufacture the induction coil according to the size of the workpiece to be processed.

[0044] 2. Calculate the length of the copper tube required to manufacture the induction coil according to the diameter of the workpiece to be processed. The inner diameter of the coil should be 6-10 mm larger than the diameter of the workpiece.

[0045] 3. Bend the copper tube into a circle on a circular pedestal, and gently tap the coil with a rubber hammer to make the coil arc as smooth as possible.

[0046] 4. Place the bent circular coil on a flat platform and gently tap it with a rubber hammer to trim the flatness of the coil.

[0047] 5. Slightly grind a circumferentially distributed positioning plane 91 at the corners of the copper tube that needs to be drilled, so that it is easy to position the water spray hole 92 during drilling.

[0048] II. Drilling

[0049] 1. Adjust the positions of the two rotating members 61 on the pallet 3 according to the size of the induction coil 9.

[0050] 2. Adjust the inclination angle of the pallet 3 and make the pallet 3 form a 45° angle with the horizontal plane. Place the flattened induction coil 9 on the two rotating members 61 of the pallet 3.

[0051] 3. Install a drill bit 81 with a diameter of 1.3 mm on the bench drill 8, and adjust the drill bit direction to align with the center line 32 of the pallet 3.

[0052] 4. By turning the rotating handwheel 45, adjust the position of the pallet 3 so that the drill bit 81 aligns with the center position of the positioning plane 91 of the induction coil 9.

[0053] 5. Turn on the power supply of the bench drill, press down the handle 82 of the bench drill to drill the induction coil 9. When drilling, hold the induction coil firmly by hand to prevent the induction coil from shifting.

[0054] 6. After drilling a water spray hole, rotate the induction coil 9 so that the just-drilled water spray hole 92 is aligned with the positioning line 33 at 2.5 mm from the center line, press down the handle 82 of the bench drill to drill the induction coil 9 again.

[0055] 7. Repeat the above steps until the drilling of the induction coil is completed.

[0056] III. Welding

[0057] 1. The two ends of the induction coil are welded to the copper pipe interfaces of the connecting bus bar at a 90° angle, and the weld joints are required to be flat.

[0058] 2. Weld the two straight copper pipes connected to the induction coil firmly to the bus bar, and connect the ports to the water pipes.

[0059] 3. If the induction coil is relatively large, 4 fixed copper plate feet need to be evenly welded on the circumferential side wall of the induction coil and fixed on the coil bracket to keep the induction coil horizontal.

[0060] 4. The interfaces of the induction coil are separated by a mica plate with a thickness of 1.5 mm and fixed firmly to prevent contact ignition, thus completing the production of the induction coil.

[0061] The above embodiments only exemplarily illustrate the concept and technical solutions of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

[0062] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An induction coil water spray hole processing device, comprising a workbench provided with a bench drill, characterized in that, At one end of the workbench away from the bench drill, there is a fixture for placing the induction coil for drilling. The fixture includes a guide rail frame, a support plate seat, and a support plate. The guide rail frame is horizontally distributed on the top surface of the workbench. The support plate seat is slidably connected to the guide rail frame. At one end of the guide rail frame away from the bench drill, there is a horizontal position adjustment mechanism connected to the support plate seat. The lower part of the support plate is hinged to the support plate seat. At one end of the support plate seat away from the bench drill, there is an angle adjustment mechanism connected to the support plate. Horizontally distributed guide grooves are provided through the lower part of the support plate, and two rotation support mechanisms for supporting the induction coil to drill water spray holes are symmetrically installed in the guide grooves.

2. The induction coil water spray hole processing device according to claim 1, characterized in that, The guide rail frame includes two guide rails made of channel steel and symmetrically distributed. A connecting plate is fixedly connected between the two guide rails. The support plate seat includes two symmetrically distributed angle irons and a number of parallel distributed mounting shafts. The mounting shafts are fixed between the two angle irons, and rollers connected to the guide rails are provided at both ends of each mounting shaft.

3. The induction coil water spray hole processing device according to claim 2, characterized in that A limit hole is provided at one end of the guide rail close to the bench drill, and a limit pin is inserted into the limit hole.

4. The induction coil water spray hole processing device according to claim 2, wherein, A locking mechanism is provided between the guide rail and the angle iron. The locking mechanism includes a first threaded sleeve located on the guide rail and a locking bolt threadedly connected to the first threaded sleeve. The locking bolt is vertically distributed with respect to the guide rail.

5. The induction coil water spray hole processing device according to claim 2, characterized in that The horizontal position adjustment mechanism includes a rear angle iron, a rear baffle, and an adjustment screw. The adjustment screw is distributed along the length direction of the guide rail frame. Both ends of the rear angle iron are fixedly connected to the two angle irons respectively. The rear angle iron is provided with a second threaded sleeve threadedly connected to the adjustment screw. A handwheel is fixedly connected to the end of the adjustment screw away from the rear angle iron. Both ends of the rear baffle are fixedly connected to the two guide rails respectively. The rear baffle is provided with a U-shaped groove for embedding the adjustment screw, and limit plates are fixedly provided on both sides of the rear baffle where the adjustment screw is located.

6. The induction coil water spray hole processing device according to claim 1, characterized in that The angle adjustment mechanism includes a threaded rod and a sleeve connected in a sliding manner. A first rotating shaft vertically distributed is fixedly connected to the end of the sleeve away from the threaded rod. The support plate is fixedly provided with a first shaft sleeve rotatably connected to the first rotating shaft. A second rotating shaft vertically distributed is fixedly connected to the end of the threaded rod away from the sleeve. The support plate seat is fixedly provided with a second shaft sleeve rotatably connected to the second rotating shaft. An adjustment nut is installed on the threaded rod.

7. The induction coil water spray hole processing device according to claim 1, characterized in that, The rotation support mechanism includes a rotating member and a bolt-nut assembly. The rotating member is rotatably installed in the guide groove through the bolt-nut assembly.

8. The induction coil water spray hole processing device according to claim 1, characterized in that A third shaft sleeve is provided at the lower part of the support plate, and a third rotating shaft rotatably connected to the third shaft sleeve is provided on the support plate seat.

9. The induction coil water spray hole processing device according to any one of claims 1 to 8, characterized in that, The upper surface of the support plate is provided with a center line distributed along the length direction and a positioning line spaced a certain distance from the center line.

10. The induction coil water spray hole processing device according to claim 9, characterized in that, The center line and the central axis of the drill bit of the bench drill are located in the same vertical plane.

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