An intermittent elongated hole processing device

Abstract

The present application relates to a kind of intermittent elongated hole processing device, for the finishing of intermittent hole after pore forming, including main mechanism, main mechanism includes bottom plate, feed assembly, motor is arranged at the output end of feed assembly and long shaft is arranged at the output shaft end of motor, it also includes the clamp for being used to the fixation of workpiece for being arranged on the upper surface of bottom plate, processing device also includes the finishing assembly being arranged at the bottom end of long shaft close to.It is supported by the lateral pressure generated by centrifugal force and the inner wall of intermittent hole by setting support assembly at both ends of blade body, reach the effect of absorbing vibration, slow down vibration tool, by setting import structure, two support assemblies can enter intermittent hole in turn, play the effect of front and rear link, so that blade body has support effect all the way, greatly improve the processing precision of intermittent elongated hole.

Description

Technical Field

[0001] This invention belongs to the field of long hole precision machining technology, specifically relating to an intermittent slender hole machining device. Background Technology

[0002] During the production of cylinder heads, due to their complex internal shape, there are intermittent, narrow holes (referred to as discontinuous holes) that need to be machined. Figure 7 As shown, when machining an intermittent hole through a cavity, a blank hole needs to be drilled first, and then a finishing process is performed. For holes with a high length-to-diameter ratio, a support mechanism is often set at the end of the finishing tool to support the inner wall of the hole in order to reduce the vibration phenomenon. However, for intermittent holes, a cavity appears in the middle of the long hole, and the hole diameter is relatively narrow, making it difficult for the support device to operate. Summary of the Invention

[0003] The purpose of this invention is to provide an intermittent long and narrow hole processing apparatus in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] An intermittent slender hole machining apparatus for finishing intermittent holes, comprising a base plate, a feed assembly, a motor disposed at the output end of the feed assembly, and a long shaft disposed at the output shaft end of the motor, and further comprising:

[0006] The blade body is located near the bottom of the long axis;

[0007] The support components located at the upper and lower ends of the blade body are used to support the inner wall of the discontinuous hole. They include a circular cylinder rotatably mounted on the outer wall of a long shaft. The inside of the circular cylinder is sealed with an annular cavity, which is filled with lubricating oil. A pressure plate is provided inside the annular cavity, and a pressing block extends from the pressure plate to the outside of the circular cylinder. The side surface of the long shaft is provided with radial grooves to give the lubricating oil in the annular cavity an outward centrifugal force.

[0008] An inlet structure located on the outer periphery of the upper support component is used to guide the upper support component into the discontinuous hole.

[0009] As a further optimization of the present invention, the processing device further includes a clamp disposed on the upper surface of the base plate for fixing the workpiece, for fixing the cylinder head to be processed.

[0010] As a further optimization of the present invention, the blade body is fixed to the surface of the long shaft by the blade base, and the rotation radius of the blade body is greater than the radius of the cylindrical cylinder. The rotation radius of the blade body is slightly greater than the radius of the cylindrical cylinder, so that the cylindrical cylinder can easily enter the discontinuous hole, and the clamping block can be easily supported after it extends.

[0011] As a further optimization of the present invention, both ends of the cylindrical cylinder are provided with sealing fillers, and the outer surface of the long shaft is provided with an oil-blocking flange located inside the sealing filler. There is a high-speed rotational relative motion between the long shaft and the cylindrical cylinder, so lubricating oil is provided inside the cylindrical cylinder. In order to seal, the oil-blocking flange is provided to block the lubricating oil that is thrown out, and the sealing filler is provided for further sealing.

[0012] As a further optimization of the present invention, sealing rings are provided on the side surface of the pressure plate and the end face near the abutment block. The lubricating oil in the annular cavity is driven to rotate, generating centrifugal force. This centrifugal force acts on the pressure plate, causing the pressure plate to support outward. The sealing rings are provided to improve the lubrication effect of the pressure plate and prevent oil leakage.

[0013] As a further optimization of the present invention, the end of the clamping block is provided with a rubber block, and the side surface of the rubber block is provided with vertical stripes. The function of the clamping block is to prevent the cylinder from rotating, so that the cylinder and the inner wall of the interrupted hole are relatively stationary. However, the finishing process requires the feed assembly to run, so there is vertical sliding between the cylinder and the inner wall of the interrupted hole. Therefore, the vertical stripes are provided to achieve the effect of lateral obstruction.

[0014] As a further optimization of the present invention, the groove is a vertical groove or a spiral groove. Setting a vertical groove can better drive the lubricating oil to rotate and centrifuge. However, when the long shaft rotates at high speed, setting a vertical groove may reduce the bearing capacity of the long shaft. Therefore, a spiral groove is set so that the spiral direction is adapted to the direction of the force on the long shaft rotation.

[0015] As a further optimization of the present invention, the inlet structure includes a shell sleeved on the outer surface of the upper cylindrical tube. Several through slots are opened between the upper and lower ends of the shell. Limit pins are slidably arranged inside the through slots. An elastic sheet that converges towards the center is provided on the inner side of the lower edge of the shell. When the long shaft rotates at high speed, the cylindrical tube that has not entered the interrupted hole will also rotate. The abutment block is in an externally supported state. In order to allow the abutment block to enter smoothly, the shell is set in advance in the cavity of the interrupted hole to restrain the abutment block.

[0016] As a further optimization of the present invention, the outer side of the upper end of the cylindrical tube is provided with an outer chamfer, and the inner side of the upper end of the outer shell is provided with an inner chamfer, so as to facilitate the interlocking and movement of the cylindrical tube and the outer shell.

[0017] The beneficial effects of this invention are as follows:

[0018] This invention provides support components at both ends of the blade body. The lateral pressure generated by centrifugal force is used to support the inner wall of the discontinuous hole, thereby absorbing vibration and reducing the vibration of the blade. By setting an inlet structure, the two support components can enter the discontinuous hole one after the other, achieving a relay effect. This ensures that the blade body has a support effect throughout the entire process, greatly improving the machining accuracy of discontinuous slender holes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the end of the long shaft of the present invention;

[0021] Figure 3 This is a side view of the pressure plate and the clamping block of the present invention;

[0022] Figure 4 This is the invention Figure 2 Enlarged view of the structure of section A in the middle;

[0023] Figure 5 This is a top sectional view of the groove of the present invention;

[0024] Figure 6 This is a schematic diagram of the spiral groove of the present invention;

[0025] Figure 7 This is a schematic diagram of the discontinuous elongated hole applicable to the present invention;

[0026] In the diagram: 1. Main body; 11. Base plate; 12. Fixture; 13. Feed assembly; 14. Motor; 15. Long shaft; 1501. Groove; 2. Finishing assembly; 21. Blade base; 22. Blade body; 3. Support assembly; 31. Circular cylinder; 32. Annular cavity; 33. Pressure plate; 34. Sealing ring; 35. Clamping block; 36. Rubber block; 3601. Vertical stripe; 37. Outer chamfer; 38. Sealing filler; 39. Oil-blocking flange; 4. Inlet structure; 41. Outer shell; 42. Through groove; 43. Limiting pin; 44. Elastic sheet; 45. Inner chamfer. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] Example 1

[0029] like Figure 1-6As shown, an intermittent slender hole processing device is used for finishing after intermittent hole formation. It includes a main body mechanism 1, which includes a base plate 11, a feed assembly 13, a motor 14 disposed at the output end of the feed assembly 13, and a long shaft 15 disposed at the output shaft end of the motor 14. It also includes a clamp 12 disposed on the upper surface of the base plate 11 for fixing the workpiece.

[0030] The processing device also includes a finishing component 2 disposed near the bottom end of the long shaft 15. The finishing component 2 includes a blade base 21, which is fixed on the surface of the long shaft 15. A blade body 22 is fixedly connected to the surface of the blade base 21, and the rotation radius of the blade body 22 is greater than the radius of the cylindrical cylinder 31.

[0031] The blade body 22 is provided with support components 3 at both ends for supporting the inner wall of the intermittent hole. The support components 3 include a circular cylinder 31 rotatably disposed on the outer wall of the long shaft 15. The inside of the circular cylinder 31 is sealed with an annular cavity 32, which is filled with lubricating oil. A pressure plate 33 is provided inside the annular cavity 32. A pressing block 35 extends from the pressure plate 33 to the outside of the circular cylinder 31. A radial groove 1501 is opened on the side surface of the long shaft 15 to give the lubricating oil in the annular cavity 32 an outward centrifugal force.

[0032] The guide structure 4, located on the outer periphery of the upper support component 3, is used to guide the upper support component 3 into the discontinuous hole.

[0033] In use, a blank hole is first machined using a drilling tool. Due to the vibration of the cutting tool, the smoothness of the blank hole is relatively low. Then, this machining device is used to perform a secondary finishing process on the blank hole. The cylinder head to be machined is placed on the fixture 12 and fixed. Then, the feed assembly 13 lowers the long shaft 15 downwards. Figure 7 The intermittent hole shown in this invention is used for machining the lower section of the intermittent hole. The upper section can be finished using conventional machining processes (hereinafter referred to as the upper section hole or the lower section hole for ease of description). The blade body 22 and the cylindrical tube 31 pass through the upper section hole and enter the lower section hole of the intermittent hole. The support component 3 at the bottom first enters the lower section hole. The blade body 22 is located at the upper edge of the lower section hole. When the long shaft 15 rotates, the support component 3 at the bottom moves. The lubricating oil is pushed outward by the centrifugal force pressure plate 33. The pressing block 35 presses against the inner wall of the lower section hole. The hydraulic pressure generated by centrifugation achieves the support effect. Although the support is not rigid, it has a good absorption effect on high-frequency vibration. When the lower support component 3 is about to leave the lower section hole, the upper support component 3 enters the lower section hole to take over the support, so that the blade body 22 always has support in the lower section hole, thus alleviating the vibration phenomenon.

[0034] Both ends of the cylindrical cylinder 31 are provided with sealing fillers 38. The outer surface of the long shaft 15 is provided with an oil-blocking flange 39 located inside the sealing filler 38. There is a high-speed rotational relative motion between the long shaft 15 and the cylindrical cylinder 31. Therefore, lubricating oil is provided inside the cylindrical cylinder 31. In order to seal, the oil-blocking flange 39 is provided to block the lubricating oil that is thrown out, and the sealing filler 38 is provided for further sealing.

[0035] Sealing rings 34 are provided on the side surface of the pressure plate 33 and the end face near the abutment block 35. The lubricating oil in the annular cavity 32 is driven to rotate, generating centrifugal force. This centrifugal force acts on the pressure plate 33, causing the pressure plate 33 to support outward. The sealing rings 34 are provided to improve the lubrication effect of the pressure plate 33 and prevent oil leakage.

[0036] A rubber block 36 is provided at the end of the clamping block 35, and vertical stripes 3601 are provided on the side surface of the rubber block 36. The function of the clamping block 35 is to prevent the cylinder 31 from rotating, so that the cylinder 31 and the inner wall of the lower section hole are relatively stationary. However, the finishing process requires the feed assembly 13 to run, so there is vertical sliding between the cylinder 31 and the inner wall of the lower section hole. Therefore, the vertical stripes 3601 are provided to achieve the effect of lateral obstruction without affecting the vertical movement.

[0037] Groove 1501 can be a vertical groove or a spiral groove. A vertical groove can better drive the lubricating oil to rotate centrifugally. However, when the long shaft 15 rotates at high speed, a vertical groove may reduce the load-bearing capacity of the long shaft 15. Therefore, a spiral groove is provided so that the spiral direction is adapted to the direction of the rotational force on the long shaft 15. The spiral groove is as follows: Figure 6 As shown.

[0038] The inlet structure 4 includes a shell 41 that is fitted onto the outer surface of the upper cylindrical tube 31. Several through slots 42 are provided between the upper and lower ends of the shell 41. Limit pins 43 are slidably provided inside each through slot 42. An elastic piece 44 that converges towards the center is provided on the inner side of the lower edge of the shell 41. When the long shaft 15 rotates at high speed, the cylindrical tube 31 that has not entered the interrupted hole will also rotate. The abutment block 35 is in an externally supported state. In order to allow the abutment block 35 to enter smoothly, the shell 41 is provided in advance in the cavity of the interrupted hole to restrain the abutment block 35.

[0039] Before use, because the outer shell 41 has a large radius, it cannot be directly entered from the upper section hole. Therefore, the outer shell 31 is placed above the lower section hole through the connecting cavity of the cylinder head. During the downward feeding of the tool, the lower support component 3 and the blade base 21 pass through the outer shell 41 in sequence until the outer shell 41 is connected to the upper support component 3. The outer shell 41 is supported by the limit pin connected to the uneven inner cavity of the cylinder head to prevent the outer shell 41 from rotating. During the downward feeding of the long shaft 15, the elastic plate 44 extends into the inner wall of the lower section hole to play a guiding role until the upper support component 3 detaches from the outer shell 41 and enters the lower section hole for support.

[0040] To facilitate the nesting and alignment between the outer shell 41 and the cylindrical tube 31, an outer chamfer 37 is provided on the outer side of the upper end of the cylindrical tube 31, and an inner chamfer 45 is provided on the inner side of the upper end of the outer shell 41.

[0041] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An intermittent slender hole machining device for finishing intermittent holes, comprising a base plate (11), a feed assembly (13), a motor (14) disposed at the output end of the feed assembly (13), and a long shaft (15) disposed at the output shaft end of the motor (14), characterized in that: Also includes: The blade body (22) is located near the bottom end of the long axis (15). The support components (3) set at the upper and lower ends of the blade body (22) are used to support the inner wall of the discontinuous hole. They include a circular cylinder (31) rotatably set on the outer wall of the long shaft (15). The inside of the circular cylinder (31) is sealed with an annular cavity (32). The inside of the annular cavity (32) is filled with lubricating oil, and a pressure plate (33) is set inside the annular cavity (32). The pressure plate (33) extends outward from the circular cylinder (31) with a pressing block (35). The side surface of the long shaft (15) is provided with radial grooves (1501) to give the lubricating oil in the annular cavity (32) an outward centrifugal force. An inlet structure (4) is provided on the outer periphery of the upper support component (3) for guiding the upper support component (3) into the discontinuity hole; The inlet structure (4) includes a shell (41) sleeved on the outer surface of the upper cylindrical tube (31). Several through slots (42) are opened between the upper and lower ends of the shell (41). Limit pins (43) are slidably arranged inside the through slots (42). An elastic sheet (44) that converges towards the center is provided on the inner side of the lower edge of the shell (41).

2. The intermittent slender hole processing device according to claim 1, characterized in that: The processing device also includes a clamp (12) disposed on the upper surface of the base plate (11) for fixing the workpiece.

3. The intermittent slender hole processing device according to claim 1, characterized in that: The blade body (22) is fixed to the surface of the long shaft (15) by the blade base (21), and the rotation radius of the blade body (22) is greater than the radius of the cylindrical tube (31).

4. The intermittent slender hole processing device according to claim 1, characterized in that: Both ends of the cylindrical tube (31) are provided with sealing fillers (38), and the outer surface of the long shaft (15) is provided with an oil-blocking flange (39) located inside the sealing filler (38).

5. The intermittent slender hole processing device according to claim 1, characterized in that: The side surface of the pressure plate (33) and the end face near the abutment block (35) are provided with sealing rings (34).

6. The intermittent slender hole processing device according to claim 1, characterized in that: The end of the clamping block (35) is provided with a rubber block (36), and the side surface of the rubber block (36) is provided with vertical stripes (3601).

7. The intermittent slender hole processing device according to claim 1, characterized in that: The groove (1501) is a vertical groove or a spiral groove.

8. The intermittent slender hole processing device according to claim 1, characterized in that: The upper outer side of the cylindrical tube (31) is provided with an outer chamfer (37), and the upper inner side of the outer shell (41) is provided with an inner chamfer (45).

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