A precision reamer

Abstract

The application discloses a precision reaming machine, which comprises a machine table, a double-station clamping mechanism, a reaming guide mechanism and a reaming machining mechanism. The double-station clamping mechanism comprises two sliding tables, a forward and reverse driving unit and two clamping fixtures. The two sliding tables are arranged on the machine table along a first direction respectively. The forward and reverse driving unit is arranged between the two sliding tables and is used for forward and reverse movement of the two sliding tables. The reaming guide mechanism comprises a frame, a first lifting driving unit, a first moving driving unit and a guide plate. The reaming machining mechanism comprises a second moving driving unit, a second lifting driving unit and a reaming unit. The second moving driving unit is arranged on the machine table along a second direction. A rack driven to move along the second direction by the second moving driving unit is connected to the second moving driving unit. The second lifting driving unit is arranged on the rack. The reaming unit is connected to the second lifting driving unit and is driven to lift by the second lifting driving unit. The application can improve the reaming precision, reduce the idle time of the machine and improve the work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a precision reaming machine. Background Technology

[0002] Reaming is the process of removing a small amount of metal from the wall of a hole in a casting using a reamer to improve the dimensional accuracy of the hole and reduce surface roughness. It is generally performed after drilling, enlarging, or boring. Reamers can be used not only to machine round holes but also to machine tapered holes using tapered reamers. Casting reaming refers to the reaming process performed on castings.

[0003] However, existing reaming devices are limited in their ability to handle applications such as... Figure 1 The casting shown has the following defects when reaming:

[0004] First, when the reamer is in direct contact with the casting, the vibration caused by the spindle rotation will cause the reamer to shift position, which will seriously affect the reaming accuracy (such as hole diameter deviation, position deviation, etc.).

[0005] Secondly, the single-station operation mode requires manual "processing-stopping-disassembly" cycle operations, resulting in idle waiting of equipment and long processing time for a single piece.

[0006] To address the aforementioned problems, this application discloses a precision reaming machine. Utility Model Content

[0007] To overcome the shortcomings of the existing technology, this utility model discloses a precision reaming machine.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is: a precision reaming machine, comprising a machine base, a dual-station clamping mechanism, a reaming guide mechanism, and a reaming processing mechanism;

[0009] The dual-station clamping mechanism includes two slides, a forward and reverse drive unit, and two clamping fixtures. The two slides are respectively arranged on the machine base along the first direction. The forward and reverse drive unit is located between the two slides for forward and reverse movement of the two slides. The two clamping fixtures are respectively located above the two slides for clamping the casting.

[0010] The hinge hole guiding mechanism includes a frame, a first lifting drive unit, a first moving drive unit, and a guide plate. The first lifting drive unit is located at the bottom of the machine platform. The frame is connected to the first lifting drive unit above the machine platform and is driven to lift and lower by it. The guide plate is slidably located inside the frame. The first moving drive unit is located on the frame along a second direction and is connected to the guide plate to drive the guide plate to move along the second direction. The guide plate has a guide hole inside.

[0011] The reaming mechanism includes a second moving drive unit, a second lifting drive unit, and a reaming unit. The second moving drive unit is mounted on the machine base along a second direction, and a frame is connected to the second moving drive unit and driven to move along the second direction. The second lifting drive unit is mounted on the frame, and the reaming unit is connected to the second lifting drive unit and driven to move up and down by it.

[0012] More preferably, the clamping fixture includes a fixture plate and three pneumatic rotating clamping blocks. The fixture plate is fixed on a slide table, and the fixture plate is provided with several positioning blocks arranged according to the outline of the casting. The three pneumatic rotating clamping blocks are located around the several positioning blocks.

[0013] More preferably, the machine tool is provided with two first linear guide rails on both sides in the second direction, and the two slides are slidably connected to the two first linear guide rails respectively;

[0014] The forward and reverse drive unit includes a first motor, a main shaft seat, and a conveyor belt. The first motor and the main shaft seat are respectively located on both sides of the machine tool in a first direction. The output shaft of the first motor passes through the machine tool and is equipped with a first pulley. The shaft of the main shaft seat passes through the machine tool and is equipped with a second pulley. The conveyor belt is wound around the first pulley and the second pulley. Two slides are respectively connected to the two sides of the conveyor belt.

[0015] The machine tool is also provided with limit blocks on both sides in the first direction to restrict the movement of the two slides.

[0016] More preferably, the first lifting drive unit includes a second motor, a synchronous shaft, two steering gears and two worm gears. The two steering gears are respectively located at the bottom of the two sides of the machine platform in the second direction. The second motor is installed on one of the steering gears. The synchronous shaft is connected between the two steering gears. The two worm gears are respectively installed in the two steering gears and pass through the machine platform to connect with the frame.

[0017] More preferably, the frame has steps on both sides in the first direction, and a second linear guide rail is provided above each of the two steps, with the guide plate slidably connected to the two second linear guide rails;

[0018] The first moving drive unit includes a first servo screw module and a connecting block. The first servo screw module is disposed above one side of the frame along the second direction and is connected to the guide plate through the connecting block.

[0019] More preferably, the bottom of the guide plate is provided with a guide block, and the guide hole is opened on the guide plate and passes through the guide block.

[0020] More preferably, the guide plate has an inverted L-shaped detection element in the middle, and the other side of the frame has slotted photoelectric sensors corresponding to the two slides. When the inverted L-shaped detection element is located in either slotted photoelectric sensor, the servo screw module stops driving the guide plate to move.

[0021] More preferably, the second moving drive unit includes a second servo screw module and two third linear guides. The second servo screw module is mounted on the machine base along a second direction, and the two second linear guides are mounted on the machine base on both sides of the second servo screw module in a first direction. The frame is slidably connected to the two third linear guides and connected to the second servo screw module.

[0022] More preferably, the second lifting drive unit includes a third servo screw module and two fourth linear guides. The third servo screw module is vertically mounted on the frame, and the two fourth linear guides are mounted on the frame on both sides of the third servo screw module. The hinge hole unit is slidably connected to the two fourth linear guides and connected to the third servo screw module.

[0023] More preferably, the reaming unit includes a spindle box, a third motor, and a reaming cutter. The spindle box is connected to a third servo screw module, the third motor is connected to the input end of the spindle box, and the reaming cutter is connected to the output end of the spindle box.

[0024] This utility model achieves the following beneficial effects:

[0025] 1. This application uses a forward and reverse drive unit to drive two slides to move in both directions, which facilitates the two clamping units on the two slides to alternately clamp the casting. This reduces the idle time of the machine and improves work efficiency.

[0026] 2. This application provides a reaming guide mechanism, which facilitates the guidance of castings during reaming, thereby avoiding deviations in the reaming position caused by the reaming tool wobbling, thus improving machining accuracy and having high practical value.

[0027] Other features and advantages of this invention will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the specification, serve to explain the principles of the disclosure.

[0029] Figure 1This is a schematic diagram of the casting and the position of the reaming hole disclosed in this utility model;

[0030] Figure 2 This is a schematic diagram of the overall structure disclosed in this utility model;

[0031] Figure 3 This is a schematic diagram of the dual-station clamping mechanism disclosed in this utility model;

[0032] Figure 4 This is a schematic diagram of the clamping fixture structure disclosed in this utility model;

[0033] Figure 5 This is a schematic diagram of the hinge hole guiding mechanism disclosed in this utility model;

[0034] Figure 6 This is a schematic diagram of the hole-reaming mechanism disclosed in this utility model. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Example

[0038] To address the issues of long downtime and low machining accuracy in existing reaming equipment, referencing... Figure 2 and Figure 6 As shown, this application discloses a precision reaming machine, including a machine base 10, a dual-station clamping mechanism 20, a reaming guide mechanism 30, and a reaming processing mechanism 40.

[0039] The dual-station clamping mechanism includes two slides 21, a forward and reverse drive unit 22, and two clamping fixtures 50. The two slides are respectively arranged on the machine base along a first direction. The forward and reverse drive unit is located between the two slides for forward and reverse movement of the two slides. The two clamping fixtures are respectively located above the two slides for clamping the castings. In specific implementation, the operator needs to place a casting into the clamping fixture on one slide and clamp it with the clamping fixture. Then, the forward and reverse drive unit is controlled to drive the slide to the processing position. At this time, the other slide will be located in the loading position under the drive of the forward and reverse drive unit. The operator can then place another casting on the clamping fixture on the slide and clamp it with the clamping fixture.

[0040] The hinge hole guide mechanism includes a frame 31, a first lifting drive unit 32, a first moving drive unit 34, and a guide plate 33. The first lifting drive unit is located at the bottom of the machine base. The frame is connected to the first lifting drive unit above the machine base and is driven to lift. The guide plate is slidably located inside the frame. The first moving drive unit is located on the frame along the second direction and is connected to the guide plate to drive the guide plate to move along the second direction. A guide hole 331 is opened inside the guide plate.

[0041] Before reaming, the first moving drive unit first drives the guide plate to be positioned above the casting to be processed. After it is in position, the lifting drive unit drives the frame to descend so that the guide plate presses against the upper surface of the casting. At this time, the position of the guide hole is the position of the hole to be reamed.

[0042] The reaming mechanism includes a second moving drive unit 41, a second lifting drive unit 43, and a reaming unit 44. The second moving drive unit is mounted on the machine base along the second direction, and a frame 42 is connected to the second moving drive unit and driven to move along the second direction. The second lifting drive unit is mounted on the frame, and the reaming unit is connected to the second lifting drive unit and driven to move up and down by it.

[0043] When the guide plate is above the casting, the second moving drive unit drives the second lifting drive unit and the reaming unit to move to correspond with the casting to be processed. After that, the second lifting drive unit drives the reaming unit to continue to descend, and the drilling part of the reaming unit is activated to pass through the guide plate to perform reaming processing on the position of the hole to be reamed in the casting.

[0044] In one specific embodiment, the clamping fixture of this application includes a fixture plate 51 and three pneumatic rotating clamping blocks 53. The fixture plate is fixed on a slide table, and the fixture plate is provided with several positioning blocks 52 arranged according to the outline of the casting. The three pneumatic rotating clamping blocks are located around the several positioning blocks. When the operator places the casting to be processed between the several positioning blocks, the three pneumatic rotating clamping blocks rotate to clamp and fix the casting. This structure is relatively simple and has high clamping accuracy.

[0045] In one specific embodiment, the present application provides two first linear guide rails 227 on both sides of the machine tool in the second direction, and two slides are respectively slidably connected to the two first linear guide rails.

[0046] Specifically, the forward and reverse drive unit includes a first motor 221, a spindle seat 223 and a conveyor belt 225. The first motor and the spindle seat are respectively located on both sides of the machine tool in the first direction. The output shaft of the first motor passes through the machine tool and is equipped with a first pulley 222. The shaft of the spindle seat passes through the machine tool and is equipped with a second pulley 224. The conveyor belt is wound around the first pulley and the second pulley. Two slides are respectively connected to the two sides of the conveyor belt.

[0047] The machine tool is also provided with limit blocks 226 on both sides of the first direction to restrict the movement of the two slides;

[0048] Firstly, it should be noted that the first feature of this application can achieve either forward or reverse rotation.

[0049] In practice, the first motor drives the conveyor belt to move forward or backward around the first and second pulleys. During this process, the two slides will move in opposite directions. That is, when one slide moves forward, the other slide will move backward. When the two slides are blocked by the limit block while moving forward or backward, they can no longer move. At this time, the reaming mechanism will perform reaming, and the operator can put the casting on the other slide.

[0050] In one specific embodiment, the first lifting drive unit of this application includes a second motor 323, a synchronous shaft 322, two steering gears 321 and two worm gears 324. The two steering gears are respectively located at the bottom of the two sides of the machine base in the second direction. The second motor is mounted on one of the steering gears. The synchronous shaft is connected between the two steering gears. The two worm gears are respectively installed in the two steering gears and pass through the machine base to connect with the frame. Under the drive of the second motor, the two steering gears can realize transmission through the synchronous shaft. In this process, the two worm gears and the driven frame realize lifting and lowering movements.

[0051] Based on the previous embodiment, this application provides steps 311 on both sides of the frame in the first direction, and provides second linear guide rails 36 above the two steps, with the guide plate slidably connected to the two second linear guide rails.

[0052] The first moving drive unit includes a first servo screw module 34 and a connecting block 35. The first servo screw module is located above one side of the frame along the second direction and is connected to the guide plate through the connecting block.

[0053] Driven by the first servo screw module, the connecting block can move the guide plate along the second direction, at which point the guide plate can reach directly above the two slides.

[0054] In order to enable the guide plate to contact the casting, this application provides a guide block 39 at the bottom of the guide plate, and a guide hole is opened on the guide plate and passes through the guide block.

[0055] To ensure that the guide plate can stop at the set position, this application also provides an inverted L-shaped detection component 37 in the middle of the guide plate, and a slotted photoelectric sensor 38 is provided on the other side of the frame corresponding to the two slides. When the inverted L-shaped detection component is located in either slotted photoelectric sensor, the servo screw module stops driving the guide plate to move.

[0056] The following is one embodiment of the reaming mechanism. The second moving drive unit of this application includes a second servo screw module 411 and two third linear guides 412. The second servo screw module is mounted on the machine base along a second direction. The two second linear guides are mounted on the machine base on both sides of the second servo screw module in a first direction. The frame is slidably connected to the two third linear guides and connected to the second servo screw module. The second lifting drive unit includes a third servo screw module 431 and two fourth linear guides 432. The third servo screw module is vertically mounted on the machine base. The two fourth linear guides are mounted on both sides of the third servo screw module on the machine base. On the frame, the reaming unit is slidably connected to two fourth linear guides and connected to the third servo screw module. The reaming unit includes a spindle box 441, a third motor 443, and a reaming cutter 442. The spindle box is connected to the third servo screw module, the third motor is connected to the input end of the spindle box, and the reaming cutter is connected to the output end of the spindle box. In specific implementation, the second servo screw module drives the frame to be located at the corresponding slide position. After it is in position, the third servo cylinder module drives the spindle box to descend in real time. During this process, the third motor will cooperate with the spindle box to drive the reaming cutter to rotate and pass through the guide hole to perform reaming machining on the corresponding position of the casting.

[0057] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A precision reaming machine, characterized in that, Includes machine base, dual-station clamping mechanism, reaming guide mechanism and reaming machining mechanism; The dual-station clamping mechanism includes two slides, a forward and reverse drive unit, and two clamping fixtures. The two slides are respectively arranged on the machine base along the first direction. The forward and reverse drive unit is located between the two slides for forward and reverse movement of the two slides. The two clamping fixtures are respectively located above the two slides for clamping the casting. The hinge hole guiding mechanism includes a frame, a first lifting drive unit, a first moving drive unit, and a guide plate. The first lifting drive unit is located at the bottom of the machine platform. The frame is connected to the first lifting drive unit above the machine platform and is driven to lift and lower by it. The guide plate is slidably located inside the frame. The first moving drive unit is located on the frame along a second direction and is connected to the guide plate to drive the guide plate to move along the second direction. The guide plate has a guide hole inside. The reaming mechanism includes a second moving drive unit, a second lifting drive unit, and a reaming unit. The second moving drive unit is mounted on the machine base along a second direction, and a frame is connected to the second moving drive unit and driven to move along the second direction. The second lifting drive unit is mounted on the frame, and the reaming unit is connected to the second lifting drive unit and driven to move up and down by it.

2. The precision reaming machine according to claim 1, characterized in that, The clamping fixture includes a fixture plate and three pneumatic rotating clamping blocks. The fixture plate is fixed on a slide table, and the fixture plate is provided with several positioning blocks arranged according to the outline of the casting. The three pneumatic rotating clamping blocks are located around the several positioning blocks.

3. A precision reaming machine according to claim 1, characterized in that, The machine tool is provided with two first linear guide rails on both sides in the second direction, and the two slides are respectively slidably connected to the two first linear guide rails; The forward and reverse drive unit includes a first motor, a main shaft seat, and a conveyor belt. The first motor and the main shaft seat are respectively located on both sides of the machine tool in a first direction. The output shaft of the first motor passes through the machine tool and is equipped with a first pulley. The shaft of the main shaft seat passes through the machine tool and is equipped with a second pulley. The conveyor belt is wound around the first pulley and the second pulley. Two slides are respectively connected to the two sides of the conveyor belt. The machine tool is also provided with limit blocks on both sides in the first direction to restrict the movement of the two slides.

4. A precision reaming machine according to claim 1, characterized in that, The first lifting drive unit includes a second motor, a synchronous shaft, two steering gears and two worm gears. The two steering gears are respectively located at the bottom of the two sides of the machine platform in the second direction. The second motor is installed on one of the steering gears. The synchronous shaft is connected between the two steering gears. The two worm gears are respectively installed in the two steering gears and pass through the machine platform to connect with the frame.

5. A precision reaming machine according to claim 1, characterized in that, The frame has steps on both sides in the first direction, and a second linear guide rail is provided above each of the two steps. The guide plate is slidably connected to the two second linear guide rails. The first moving drive unit includes a first servo screw module and a connecting block. The first servo screw module is disposed above one side of the frame along the second direction and is connected to the guide plate through the connecting block.

6. A precision reaming machine according to claim 5, characterized in that, The bottom of the guide plate is provided with a guide block, and the guide hole is opened on the guide plate and passes through the guide block.

7. A precision reaming machine according to claim 5, characterized in that, The guide plate has an inverted L-shaped detection component in the middle, and the other side of the frame has two slotted photoelectric sensors corresponding to the two slides. When the inverted L-shaped detection component is located in either slotted photoelectric sensor, the servo screw module stops driving the guide plate to move.

8. A precision reaming machine according to claim 1, characterized in that, The second moving drive unit includes a second servo screw module and two third linear guides. The second servo screw module is mounted on the machine base along a second direction, and the two second linear guides are mounted on the machine base on both sides of the second servo screw module in a first direction. The frame is slidably connected to the two third linear guides and connected to the second servo screw module.

9. A precision reaming machine according to claim 8, characterized in that, The second lifting drive unit includes a third servo screw module and two fourth linear guides. The third servo screw module is vertically mounted on the frame, and the two fourth linear guides are mounted on the frame on both sides of the third servo screw module. The hinge hole unit is slidably connected to the two fourth linear guides and connected to the third servo screw module.

10. A precision reaming machine according to claim 9, characterized in that, The reaming unit includes a spindle box, a third motor, and a reaming cutter. The spindle box is connected to a third servo screw module, the third motor is connected to the input end of the spindle box, and the reaming cutter is connected to the output end of the spindle box.

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