Side hole machining clamp

Abstract

The utility model discloses a side hole machining clamp, which aims to enable mounting plates to be detachable and different mounting plates to be adaptive to different workpieces, so that the clamp can be adaptive to different workpieces for side hole machining, and adopts the technical scheme that the side hole machining clamp comprises a base, a main plate, a driving device, the mounting plates and a pressing plate, the mounting plate is detachably fixed on one side of the main plate, and the driving device is fixed on one side, back to the mounting plate, of the main plate; a positioning column, a positioning pin and a plurality of cushion blocks are arranged on the mounting plate, the positioning column is used for sleeving a workpiece, the plurality of cushion blocks are circumferentially arranged around the positioning column to position one surface, close to the mounting plate, of the workpiece, and the positioning pin is used for positioning a pin hole in the workpiece; the positioning column is provided with a first through hole penetrating in the axial direction of the positioning column, the mounting plate is provided with a second through hole in butt joint with the first through hole, the main plate is provided with a third through hole in butt joint with the second through hole, and the tool further comprises a pull rod penetrating through the first through hole, the second through hole and the third through hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining, and more specifically, relates to a side hole machining fixture. Background Art

[0002] When machining products, fixtures are generally required to fix them to ensure the stability of the products during the machining process. Especially for side hole machining, since it is necessary to machine on the side of the product, it is more difficult to clamp the product, such as the machining of the cylinder spring hole.

[0003] Patent CN201520599583.4 discloses a machining tool for cylinder spring holes, including a bottom plate, a longitudinal support plate fixed at the upper end of the bottom plate, a main board fixedly installed on the right side of the support plate through bolts, a workpiece installed on the left side of the main board, a tooling plate installation slot provided on the right side of the main board, a model replacement tooling plate installed in the tooling plate installation slot, further including a pressing plate and a pull rod connecting the pressing plate, the pressing plate is arranged on the right side of the model replacement tooling plate, and positioning holes are provided on the model replacement tooling plate;

[0004] In the above tooling, the main board is fixed and unchangeable, so the size and shape of the installable workpiece cannot be changed, and it can only be for a single product. In practice, there are various types of such products. If the tooling can only be applicable to a single product, then a new tooling needs to be configured every time the product is changed, which is rather cumbersome and lacks flexibility. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a side hole machining fixture, aiming to make the mounting plate detachable, and different mounting plates can be adapted to different workpieces, so that the fixture can be adapted to different workpieces for side hole machining.

[0006] According to the first aspect of the utility model, a side hole machining fixture is provided, including a base, a main board, a driving device, a mounting plate and a pressing plate. The main board is fixed on the base, the mounting plate is fixed on one side of the main board in a detachable manner, and the driving device is fixed on the side of the main board facing away from the mounting plate;

[0007] The mounting plate is provided with positioning columns, positioning pins and a plurality of cushion blocks. The positioning columns are for the workpiece to be sleeved, and the plurality of cushion blocks are arranged circumferentially around the positioning columns to position one side of the workpiece close to the mounting plate, and the positioning pins are used to position the pin holes on the workpiece;

[0008] The positioning post is provided with a first through hole penetrating along its axial direction, the mounting plate is provided with a second through hole docked with the first through hole, the main board is provided with a third through hole docked with the second through hole, and further includes a pull rod passing through the first through hole, the second through hole and the third through hole. One end of the pull rod is connected to the driving device, and the other end of the pull rod is connected to the pressing plate. The pull rod moves along the axial direction of the positioning post under the drive of the driving device, so that the pressing plate presses the workpiece against the cushion block.

[0009] In the side hole processing fixture described above, the positioning post and the mounting plate are detachably connected.

[0010] In the side hole processing fixture described above, the cushion block is provided with a counterbore, and a plurality of threaded holes are circumferentially and uniformly distributed around the positioning post on the mounting plate. Screws are used to pass through the counterbore and be threadedly connected with the threaded holes to fix the cushion block on the mounting plate.

[0011] In the side hole processing fixture described above, a plurality of blind holes are circumferentially arranged around the positioning post on the mounting plate. The positioning pin includes a first connecting section, a second connecting section and a third connecting section connected in sequence. The outer diameter of the second connecting section is larger than the outer diameters of the first connecting section and the third connecting section. The first connecting section is matched with the blind hole. The length of the second connecting section is smaller than the thickness of the cushion block, and the length of the third connecting section is larger than the thickness of the cushion block.

[0012] In the side hole processing fixture described above, the pressing plate includes a circular plate body. The plate body is provided with a through groove, and the through groove extends along the diameter line of the plate body. One end of the through groove is an open end. The end of the pull rod away from the driving device is provided with a cylindrical limiting portion. The outer diameter of the limiting portion is larger than the width of the through groove, and the outer diameter of the pull rod is smaller than or equal to the width of the through groove. The length of the through groove is larger than the radius of the plate body and smaller than the diameter of the plate body. The pressing plate is erected on the pull rod through the through groove.

[0013] In the side hole processing fixture described above, a handle is provided on the side of the plate body away from the positioning post. The handle extends along the axial direction of the positioning post. The positioning post and the through groove are located on the same diameter line of the plate body.

[0014] In the side hole processing fixture described above, an arc-shaped groove is provided at the edge of the end of the through groove away from its open end. An annular protrusion is provided on the side of the limiting portion close to the pressing plate. The annular protrusion is adapted to the arc-shaped groove, and the annular protrusion can be embedded into the arc-shaped groove.

[0015] One of the technical solutions in the above technical solutions of the present invention has at least the following advantages or beneficial effects:

[0016] In the present utility model, a detachable mounting plate is provided. The mounting plate is provided with a cushion block and a positioning pin to position the workpiece. For different mounting plates, the positions of the cushion block and the positioning pin can be different. Therefore, different mounting plates can position different workpieces. By replacing different mounting plates, different workpieces can be fixed for side hole machining without replacing the entire fixture, and the flexibility of the fixture is better. Description of the Drawings

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0018] Figure 1 is a schematic structural view of the first embodiment of the present utility model;

[0019] Figure 2 is a cross-sectional view of the first embodiment of the present utility model;

[0020] Figure 3 is a schematic structural view of the positioning pin of the first embodiment of the present utility model;

[0021] Figure 4 is a schematic structural view of the pressing plate of the first embodiment of the present utility model

[0022] Among them, the reference numerals of each figure:

[0023] 1, base; 2, main board; 21, third through hole; 22, threaded hole; 23, blind hole; 3, driving device; 4, mounting plate; 41, positioning column; 411, first through hole; 42, positioning pin; 421, first connection section; 422, second connection section; 423, third connection section; 43, cushion block; 44, second through hole; 5, pressing plate; 51, plate body; 52, through groove; 521, arc-shaped groove; 53, handle; 6, pull rod; 61, limiting part; 62, annular protrusion. Specific Embodiments

[0024] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0025] The following disclosure provides many different embodiments or examples for implementing different solutions of the present utility model.

[0026] Refer to Figures 1 to 4As shown, a side hole processing fixture includes a base 1, a main board 2, a driving device 3, a mounting plate 4 and a pressing plate 5, the main board 2 is fixed on the base 1, the mounting plate 4 is detachably fixed to one side of the main board 2, and the driving device 3 is fixed to the side of the main board 2 facing away from the mounting plate 4;

[0027] The mounting plate 4 is provided with a positioning column 41 for the workpiece to be sleeved, and the mounting plate 4 is provided with a positioning pin 42 and a plurality of cushion blocks 43. The plurality of cushion blocks 43 are circumferentially arranged around the positioning column 41 to position the workpiece close to one side of the mounting plate 4, and the positioning pin 42 is used to position the pin hole on the workpiece;

[0028] The positioning column 41 is provided with a first through hole 411 penetrating along the axial direction thereof, the mounting plate 4 is provided with a second through hole 44 docking with the first through hole 411, the main plate 2 is provided with a third through hole 21 docking with the second through hole 44, and further includes a pull rod 6 passing through the first through hole 411, the second through hole 44 and the third through hole 21, one end of the pull rod 6 is connected to the driving device 3, and the other end of the pull rod 6 is connected to the pressing plate 5, and the pull rod 6 moves along the axial direction of the positioning column 41 under the drive of the driving device 3, so that the pressing plate 5 presses the workpiece onto the cushion block 43;

[0029] During the clamping process, the positioning column 41 is used to preliminarily position the workpiece, and then the positioning pin 42 is used to accurately position the workpiece. The pad 43 provides a reference to ensure that the workpiece is pressed against a reference surface. It can be seen that the size of the positioning column 41 on the mounting plate 4 and the layout of the pad 43 and the positioning pin 42 are the main structures for positioning the workpiece. In the present application, the mounting plate 4 is detachable and replaceable. Different mounting plates 4 can position different workpieces. By replacing different mounting plates 4, different workpieces can be fixed and side hole processing can be performed without replacing the entire fixture. The fixture has better flexibility.

[0030] In this embodiment, the driving device 3 is a hydraulic cylinder.

[0031] In this embodiment, the mounting plate 4 is connected to the main board 2 by bolts, and the mounting plate 4 can be replaced by removing the bolts.

[0032] In this embodiment, the positioning column 41 is detachably connected to the mounting plate 4. When the mounting plate 4 is replaced, the positioning column 41 on the mounting plate 4 can be replaced to make the outer diameter of the positioning column 4 different, so that the mounting plate 4 can adapt to workpieces with different inner diameters.

[0033] The positioning column 41 can be fixed on the mounting plate 4 by threaded connection or by screw locking.

[0034] In this embodiment, the spacer block 43 is provided with a counterbore, and a plurality of threaded holes 22 are circumferentially and uniformly distributed around the positioning post 41 on the mounting plate 4. Screws are used to pass through the counterbore and be threadedly connected to the threaded holes 22 to fix the spacer block 43 on the mounting plate 4. The side of the spacer block 43 away from the mounting plate 4 is the reference surface, which can support the workpiece and position the workpiece; without replacing the mounting plate 4, the position of the spacer block 43 can be changed to adapt to different workpieces and ensure stable support for the workpiece.

[0035] In this embodiment, a plurality of blind holes 23 are circumferentially arranged around the positioning post 41 on the mounting plate 4. The positioning pin 42 includes a first connecting section 421, a second connecting section 422, and a third connecting section 423 that are sequentially connected. The outer diameter of the second connecting section 422 is larger than the outer diameters of the first connecting section 421 and the third connecting section 423. The first connecting section 421 cooperates with the blind hole 23. The length of the second connecting section 422 is less than the thickness of the spacer block 43, and the length of the third connecting section 423 is greater than the thickness of the spacer block 43.

[0036] During installation, the first connecting section 421 is inserted into the blind hole 23, and the second connecting section 422 plugs the blind hole 23. At this time, the third connecting section 423 is completely exposed. The pin hole on the workpiece can cooperate with the third connecting section 423 to accurately position the workpiece. The third connecting section 423 is relatively long to ensure that the workpiece cooperates with the third connecting section 423 before touching the spacer block 43; without replacing the mounting plate 4, the position of the positioning pin 42 can be changed by inserting and pulling to adapt to different workpieces.

[0037] In this embodiment, the pressing plate 5 includes a circular plate body 51. A through groove 52 is provided on the plate body 51. The through groove 52 extends along the radial line of the plate body 51. One end of the through groove 52 is an open end. The end of the pull rod 6 away from the driving device 3 is provided with a cylindrical limiting portion 61. The outer diameter of the limiting portion 61 is larger than the width of the through groove 52, and the outer diameter of the pull rod 6 is less than or equal to the width of the through groove 52. The length of the through groove 52 is greater than the radius of the plate body 51 and less than the diameter of the plate body 51. The pressing plate 5 is mounted on the pull rod 6 through the through groove 52. Due to the length design of the through groove 52, after the pressing plate 5 is mounted on the pull rod 6, the pressing plate 5 will not fall off, and the through groove 52 is not easily separated from the pull rod 6.

[0038] Preferably, a handle 53 is provided on the side of the plate body 51 away from the positioning post 41. The handle 53 extends along the axial direction of the positioning post 41. The positioning post 41 and the through groove 52 are on the same radial line of the plate body 51. By grasping the handle 53, the pressing plate 5 can be moved; when installing the workpiece, first remove the pressing plate 5, and after the workpiece is positioned, then place the pressing plate 5 on the pull rod 6.

[0039] Preferably, an arc-shaped groove 521 is provided at the edge of one end of the through groove 52 away from its open end, and an annular protrusion 62 is provided on the side of the limiting portion 61 close to the pressing plate 5. The annular protrusion 62 is adapted to the arc-shaped groove 521, and the annular protrusion 62 can be embedded in the arc-shaped groove 521 to prevent the pressing plate 5 from running off during the pressing process, and the force on the pressing plate 5 can be centered, making it more stable when pressing the workpiece.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A side hole processing fixture, characterized in that: It includes a base, a main board, a driving device, a mounting plate and a pressing plate, wherein the main board is fixed on the base, the mounting plate is detachably fixed to one side of the main board, and the driving device is fixed to the side of the main board facing away from the mounting plate; The mounting plate is provided with a positioning column, a positioning pin and a plurality of cushion blocks, the positioning column is provided for the workpiece to be sleeved, the plurality of cushion blocks are circumferentially arranged around the positioning column to position the workpiece close to one side of the mounting plate, and the positioning pin is used to position the pin hole on the workpiece; The positioning column is provided with a first through hole extending through the positioning column along its axial direction, the mounting plate is provided with a second through hole docked with the first through hole, the main board is provided with a third through hole docked with the second through hole, and also includes a pull rod passing through the first through hole, the second through hole and the third through hole, one end of the pull rod is connected to the driving device, and the other end of the pull rod is connected to the pressure plate, and the pull rod moves along the axial direction of the positioning column under the drive of the driving device to allow the pressure plate to press the workpiece onto the pad.

2. The side hole processing fixture according to claim 1, characterized in that: The positioning column and the mounting plate are detachably connected.

3. The side hole processing fixture according to claim 1, characterized in that: The cushion block is provided with a countersunk hole, and the mounting plate is provided with a plurality of threaded holes evenly distributed circumferentially around the positioning column. Screws are passed through the countersunk holes and threadedly connected with the threaded holes to fix the cushion block on the mounting plate.

4. The side hole processing fixture according to claim 1, characterized in that: A plurality of blind holes are arranged circumferentially around the positioning column on the mounting plate, and the positioning pin includes a first connecting section, a second connecting section and a third connecting section connected in sequence, the outer diameter of the second connecting section is larger than the outer diameter of the first connecting section and the outer diameter of the third connecting section, the first connecting section cooperates with the blind hole, the length of the second connecting section is smaller than the thickness of the cushion block, and the length of the third connecting section is larger than the thickness of the cushion block.

5. The side hole processing fixture according to claim 1, characterized in that: The pressure plate includes a circular plate body, a through slot is provided on the plate body, the through slot extends along the radial line of the plate body, one end of the through slot is an open end, and a cylindrical limiting portion is provided at the end of the pull rod away from the driving device, the outer diameter of the limiting portion is greater than the width of the through slot, the outer diameter of the pull rod is less than or equal to the width of the through slot, the length of the through slot is greater than the radius of the plate body and less than the diameter of the plate body, and the pressure plate is mounted on the pull rod through the through slot.

6. The side hole processing fixture according to claim 5, characterized in that: A handle is provided on one side of the plate body away from the positioning column. The handle extends along the axial direction of the positioning column. The positioning column and the through slot are located on the same radial line of the plate body.

7. The side hole processing fixture according to claim 5, characterized in that: An arc-shaped groove is provided at the edge of one end of the through slot away from its open end, and an annular protrusion is provided on the side of the limiting portion close to the pressure plate. The annular protrusion is adapted to the arc-shaped groove and can be embedded in the arc-shaped groove.

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