Block-free clamping structure for machining excircles of shaft parts

Abstract

The invention relates to the field of grinding machine ejector pins, in particular to a block-free clamping structure for shaft part outer circle machining, which comprises a front ejector pin and a fastening column, a threaded hole is machined in one end of the fastening column along the axis direction, the fastening column is detachably connected to the outer wall of the front ejector pin through the threaded hole, a step section is machined at one end of the fastening column, and the step section is detachably connected to the outer wall of the front ejector pin through the threaded hole. The step section is coaxial with the threaded hole, and the tip end of the front ejector pin extends to the outer side of the step section. After the tip ends of the front ejector pin and the rear ejector pin abut against the ejector pin holes in the two ends of the product piece correspondingly, the fastening column is screwed towards the product piece, the fastening column is promoted to tightly extrude the product piece through the step section, stable clamping of the product piece is achieved, operation is easy and fast, and the problems that an existing belt block is time-consuming to install and low in efficiency are effectively solved; in addition, one-time clamping in the mode is adopted, multiple sections of positions of the product piece can be comprehensively ground, the product piece does not need to be turned around, and the machining efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of grinding machine ejector pins, and in particular to a block-free clamping structure for external cylindrical machining of shaft parts. Background Art

[0002] At present, the method of machining the outer circle of shaft parts is to use ejector positioning, such as Figure 4 As shown, when the existing shaft parts product A is grinding the outer circle, there will be a belt block C at the front end to drive the product to rotate. The belt block C needs to select a matching belt block according to the size of the outer circle of the product A, and each product must install and loosen the belt block by tightening the screw B, which is time-consuming and inefficient. If the product needs to grind multiple sections of the outer diameter, the product needs to be turned around, resulting in multiple clamping of the belt block, affecting the processing efficiency. Summary of the invention

[0003] The present invention provides a block-free clamping structure for machining the outer circle of shaft parts, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A block-free clamping structure for external cylindrical machining of shaft parts comprises a front ejector pin and a fastening column, one end of the fastening column is processed with a threaded hole along the axial direction, the fastening column is detachably connected to the outer wall of the front ejector pin through the threaded hole, and one end of the fastening column is processed with a step, the step is coaxial with the threaded hole, and the tip of the front ejector pin extends to the outside of the step.

[0005] Preferably, a pin hole communicating with the threaded hole is formed through the axial center of the stage, and the tip of the front pin extends to the outside of the stage through the pin hole.

[0006] Preferably, the inner diameter of the ejector pin hole is smaller than the inner diameter of the threaded hole, and the inner diameter of the ejector pin hole is 5 mm.

[0007] Preferably, the outer wall of the front ejector pin is provided with an external thread for matching with the internal thread of the threaded hole.

[0008] Preferably, the outer diameter of the stage is smaller than the outer diameter of the product.

[0009] Preferably, the length of the step is smaller than the length of the fastening column, and the length of the step is 3 mm.

[0010] Preferably, the fastening column and the platform stage are an integrally formed structure.

[0011] Preferably, the outer wall of the fastening column is provided with an anti-slip texture.

[0012] Preferably, it also includes a three-jaw chuck for clamping the tail end of the front ejector and a rear ejector arranged opposite to the front ejector.

[0013] Preferably, the front ejector pin and the rear ejector pin are coaxially arranged.

[0014] By adopting the above technical solution, the beneficial effects achieved by the present invention are: In the present invention, after the tips of the front ejector pin and the rear ejector pin are respectively inserted into the ejector holes at both ends of the product part, the fastening column is screwed toward the product part, so that the fastening column is pressed against the stage to squeeze the product part, thereby achieving stable clamping of the product part. The operation is simple and quick, and the problem of time-consuming and low efficiency of the existing belt block installation is effectively solved. Moreover, by adopting this method of one-time clamping, multiple positions of the product part can be fully ground without turning the product part around, thereby effectively improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the stage and ejector pin hole structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the threaded hole structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the clamping structure of existing shaft parts products.

[0019] In the figure: 1. Product part; 2. Front ejector; 3. Rear ejector; 4. Three-jaw chuck; 5. Fastening column; 6. Stage; 7. Ejector hole; 8. Threaded hole. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] like Figure 1-Figure 3As shown, the present invention provides a block-free clamping structure for external cylindrical machining of shaft parts, including a front ejector pin 2 and a fastening column 5, one end of the fastening column 5 is processed with a threaded hole 8 along the axis toward the other end, the fastening column 5 is detachably connected to the outer wall of the front ejector pin 2 through the threaded hole 8, and one end of the fastening column 5 is processed with a step 6, the step 6 is coaxial with the threaded hole 8, and the tip of the front ejector pin 2 extends to the outside of the step 6.

[0023] Furthermore, a pin hole 7 communicating with the threaded hole 8 is penetrated through the axial part of the stage 6, and the tip of the front pin 2 extends to the outside of the stage 6 through the pin hole 7, so that the inner diameter of the pin hole 7 is smaller than the inner diameter of the threaded hole 8, and the inner diameter of the pin hole 7 is 5 mm.

[0024] Specifically, the tip of the front ejector pin 2 can extend outward by designing the ejector pin hole 7, so that the tip of the front ejector pin 2 can abut against the product part 1, thereby ensuring the stability of one end of the product part 1, and then cooperate with the rear ejector pin 3 to abut against the other end of the product part 1, thereby ensuring the stability of the overall clamping of the product part 1.

[0025] As a further feature, the outer wall of the front ejector pin 2 is provided with an external thread for matching with the internal thread of the threaded hole 8 .

[0026] Specifically, the external thread of the outer wall of the front ejector pin 2 is close to the tip of the front ejector pin 2 . Therefore, through the design of the external thread, the fastening column 5 can be replaced according to the situation to ensure the stability of the product 1 when clamping.

[0027] As a further feature, the outer diameter of the stage 6 is smaller than the outer diameter of the product 1 .

[0028] Specifically, the outer diameter of the stage 6 cannot be larger than the outer circle of the product 1, which can effectively avoid interference between the grinding wheel and the stage 6 when grinding the outer circle.

[0029] As a further feature, the length of the step 6 is smaller than the length of the fastening column 5, and the length of the step 6 is 3 mm.

[0030] Specifically, the length of the stage 6 is 3 mm, which effectively gives way to the side of the grinding wheel.

[0031] As a further feature, the fastening column 5 and the platform stage 6 are an integrally formed structure.

[0032] As a further feature, the outer wall of the fastening column 5 is provided with an anti-slip texture.

[0033] Specifically, the anti-skid texture design can ensure the reliability of the fastening column 5 when tightening or loosening.

[0034] As a further feature, the invention also includes a three-jaw chuck 4 for clamping the tail end of the front ejector 2 and a rear ejector 3 arranged opposite to the front ejector 2 , and the front ejector 2 and the rear ejector 3 are arranged coaxially.

[0035] like Figure 1-Figure 3 As shown, the present invention also provides a clamping and using method for machining the outer circle of shaft parts without a block, comprising the following steps: S100, first, the front ejector pin 2 is placed in the three-jaw chuck 4 for clamping and fixing; S200, threading the fastening column 5 to the outer wall of the front ejector pin 2, and making the tip of the front ejector pin 2 exposed to the outside of the stage 6; S300, placing the product 1 between the front ejector 2 and the rear ejector 3, so that the tips of the front ejector 2 and the rear ejector 3 are respectively inserted into the ejector holes at both ends of the product 1; S400 , screw the fastening column 5 so that the fastening column 5 is pressed against the stage 6 to tightly squeeze the product part 1 .

[0036] In S400, after the fastening column 5 relies on the stage 6 to squeeze the product part 1, the product part 1 can be firmly clamped, and the fastening column 5 and the product part 1 are separated by a distance with the help of the stage 6, which effectively makes way for the side of the grinding wheel to avoid collision with the fastening column 5 when the grinding wheel is grinding the outer circle.

[0037] The working principle and use process of the present invention are as follows: the tail end of the front ejector 2 is clamped and fixed by the three-jaw chuck 4, and then the fastening column 5 is screwed toward the tail end on the outer wall of the front ejector 2, so that the tip of the front ejector 2 is exposed on the outside of the stage 6, and then the product 1 is placed between the front ejector 2 and the rear ejector 3, and the tips of the front ejector 2 and the rear ejector 3 are respectively inserted into the ejector holes at both ends of the product 1, and then the fastening column 5 is screwed in the opposite direction until the fastening column 5 is pressed against the stage 6 to squeeze the product 1, so as to achieve stable clamping of the product 1, and solve the problem that the existing belt block installation is time-consuming and inefficient; and by adopting this method of one-time clamping, multiple sections of the product 1 can be fully ground without the need for the product 1 to turn around, thereby effectively improving the processing efficiency.

[0038] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] 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 the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A block-free clamping structure for external cylindrical machining of shaft parts, characterized in that: The invention comprises a front ejector pin (2) and a fastening column (5), wherein one end of the fastening column (5) is processed with a threaded hole (8) along the axial direction, and the fastening column (5) is detachably connected to the outer wall of the front ejector pin (2) through the threaded hole (8), and one end of the fastening column (5) is processed with a step (6), the step (6) is coaxial with the threaded hole (8), and the tip of the front ejector pin (2) extends to the outside of the step (6).

2. The block-free clamping structure for outer cylindrical machining of shaft parts according to claim 1 is characterized in that: The axial center of the stage (6) is penetrated by a pin hole (7) which is in communication with the threaded hole (8), and the tip of the front pin (2) extends to the outside of the stage (6) through the pin hole (7).

3. The block-free clamping structure for outer cylindrical machining of shaft parts according to claim 2 is characterized in that: The inner diameter of the ejector pin hole (7) is smaller than the inner diameter of the threaded hole (8), and the inner diameter of the ejector pin hole (7) is 5 mm.

4. The block-free clamping structure for outer cylindrical machining of shaft parts according to claim 1 is characterized in that: The outer wall of the front ejector pin (2) is provided with an external thread for matching the internal thread of the threaded hole (8).

5. The block-free clamping structure for outer cylindrical machining of shaft parts according to claim 1 is characterized in that: The outer diameter of the stage (6) is smaller than the outer diameter of the product (1).

6. The block-free clamping structure for external cylindrical machining of shaft parts according to claim 1 is characterized in that: The length of the step (6) is smaller than the length of the fastening column (5), and the length of the step (6) is 3 mm.

7. The block-free clamping structure for external cylindrical machining of shaft parts according to claim 1 is characterized in that: The fastening column (5) and the platform stage (6) are an integrally formed structure.

8. The block-free clamping structure for external cylindrical machining of shaft parts according to claim 1 is characterized in that: The outer wall of the fastening column (5) is provided with an anti-slip texture.

9. The block-free clamping structure for outer cylindrical machining of shaft parts according to claim 1 is characterized in that: It also includes a three-jaw chuck (4) for clamping the rear end of the front ejector (2) and a rear ejector (3) arranged opposite to the front ejector (2).

10. The block-free clamping structure for external cylindrical machining of shaft parts according to claim 9, characterized in that: The front ejector pin (2) and the rear ejector pin (3) are coaxially arranged.

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