Machining fixing device

Abstract

The utility model relates to the technical field of tool clamps, and discloses a machining fixing device which comprises a workbench. The mold core is arranged on the workbench, a sleeving position is formed on the outer wall of the mold core, an exhaust groove is formed in the outer wall of the mold core, and the exhaust groove corresponds to the sleeving position and extends out of the sleeving position; the limiting pin is arranged on the workbench; the pressing block is movably arranged on the workbench, a pressing face is formed on the pressing block, a working hole is formed in the pressing face and penetrates through the pressing block, in the pressing state, the pressing face is close to the mold core so that the pressing block can press the workpiece to be machined to the mold core, and the pressing block abuts against the limiting pin; in the open state, the pressing face is away from the mold core. According to the utility model, the exhaust groove is formed in the die core, so that when the to-be-processed workpiece is sleeved into the die core, gas between the to-be-processed workpiece and the die core is exhausted outwards through the exhaust groove, and further, the positioning accuracy of trepanning is improved; and by arranging the limiting pin, the limiting pin abuts against the pressing block in the pressing state, the pressing block is prevented from excessively pressing the to-be-machined part downwards, and the to-be-machined part is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a processing and fixing device. Background Art

[0002] Due to its unique shape and performance characteristics, cylindrical parts are widely used in many fields such as packaging, machinery, construction, electronics, and seals. In order to meet their actual application requirements, it is often necessary to drill holes in cylindrical parts. In order to improve the hole drilling accuracy of cylindrical parts, a tooling fixing device is often used to fix the cylindrical parts. When fixing the cylindrical part, its internal cavity abuts against the die core to form a sealed cavity, and it is difficult to clamp the cylindrical part. In the prior art, a die core with a diameter smaller than the inner diameter of the cylindrical part to be processed is often used to avoid the problem of air entrapment. However, the inner wall of the cylindrical part to be processed cannot be closely attached to the die core, and the cylindrical part to be processed is prone to shaking when sleeved on the die core, thereby affecting the accuracy of hole opening positioning and subsequent processing. Moreover, the pressure block in the tooling fixing device applies too much downward pressure on the cylindrical part to be processed, which is easy to damage the cylindrical part to be processed. Content of the Utility Model

[0003] In view of this, the utility model provides a processing and fixing device to solve the problems that the die core in the prior art affects the accuracy of hole opening positioning and the pressure block applies too much downward pressure on the cylindrical part to be processed.

[0004] The utility model provides a processing and fixing device, comprising: a workbench; a die core arranged on the workbench, an outer wall of the die core is formed with a sleeving position, an exhaust groove is formed on the outer wall of the die core, the exhaust groove corresponds to the sleeving position and extends out of the sleeving position; a limit pin arranged on the workbench; a pressure block movably arranged on the workbench, a pressing surface is formed on the pressure block, a working hole is formed on the pressing surface, the working hole penetrates through the pressure block, the pressure block has a pressing state and an open state, in the pressing state, the pressing surface approaches the die core so that the pressure block presses a workpiece to be processed on the sleeving position, the pressure block abuts against the limit pin, and the working hole corresponds to the die core; in the open state, the pressing surface is far away from the die core.

[0005] Beneficial effects: By arranging an exhaust groove on the die core, when the workpiece to be processed is sleeved on the die core, the gas between the workpiece to be processed and the die core is discharged outward through the exhaust groove, so as to ensure that the inner wall of the workpiece to be processed is closely attached to the die core without reducing the size of the die core, thereby improving the accuracy of hole opening positioning; by arranging a limit pin, in the pressing state, the limit pin abuts against the pressure block, avoiding excessive downward pressure of the pressure block on the workpiece to be processed and avoiding damage to the workpiece to be processed.

[0006] In an alternative embodiment, the processing fixture further includes a driving assembly disposed on the workbench, and the driving assembly is in driving connection with the pressing block.

[0007] In an alternative embodiment, the driving assembly includes a driving cylinder and a connecting piece. One end of the pressing block forms the pressing surface, the other end of the pressing block is hinged to the piston rod of the driving cylinder, the first end of the connecting piece is fixedly arranged, and the second end of the connecting piece is hinged between the two ends of the pressing block.

[0008] Advantageous effects: The structure of the driving cylinder is simple and the operation is reliable. When realizing reciprocating motion, a speed reduction device can be omitted and there is no transmission gap, thereby ensuring the movement stability of the pressing block.

[0009] In an alternative embodiment, the driving assembly further includes a base which is fixedly arranged, and the first end of the connecting piece is connected to the base.

[0010] Advantageous effects: The connecting piece is connected to the base, and the connection angle between the connecting piece and the base can be adjusted to meet the usage requirements of different pressing blocks, improving the applicability of the device.

[0011] In an alternative embodiment, the pressing block includes a main body portion and a pressing portion. The pressing portion is detachably connected to one surface of the main body portion. The main body portion is movably arranged on the workbench, and the surface of the pressing portion away from the main body portion forms the pressing surface.

[0012] Advantageous effects: The main body portion and the pressing portion are detachably connected, which is convenient for replacing the pressing portion and facilitating the maintenance of the pressing block structure.

[0013] In an alternative embodiment, a mortise groove is formed on the main body portion, and a tenon protrudes from the pressing portion. The tenon is embedded in the mortise groove.

[0014] Advantageous effects: Through the tight engagement of the mortise groove and the tenon, relative movement between the main body portion and the pressing portion is prevented, improving the connection stability between the main body portion and the pressing portion.

[0015] In an alternative embodiment, a groove is formed on the side of the pressing portion away from the main body portion, and the groove communicates with the working hole. In the pressing state, the groove wall is adapted to be in fit contact with the workpiece to be processed.

[0016] Advantageous effects: By forming a groove on the pressing portion, the positioning accuracy of the pressing block is further improved.

[0017] In an alternative embodiment, the pressing portion is an elastic structure.

[0018] Beneficial effects: The pressing part is an elastic structure, which avoids excessive downward pressing of the pressing part and prevents damage to the workpiece to be processed.

[0019] In an alternative embodiment, the limit pin includes a pressure-limiting part and a guiding part. The pressure-limiting part is arranged on the workbench, and the guiding part is connected to one end of the pressure-limiting part away from the workbench. A guiding hole is formed in the pressing block. In the pressing state, the guiding part is inserted into the guiding hole, and the pressure-limiting part abuts against the pressing block.

[0020] Beneficial effects: Through the arrangement of the guiding part and the guiding hole, when the pressing block is pressed downward, the guiding part enters the guiding hole to further limit the pressing block. On the basis of realizing the pressure-limiting function of the limit pin, the guiding function is also realized, improving the positioning accuracy of the hole opening.

[0021] In an alternative embodiment, the processing and fixing device further includes support columns and a bottom plate. A plurality of support columns are provided. One end of the support column is connected to the workbench, and the other end of the support column is connected to the bottom plate. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic diagram of the overall structure of the processing and fixing device according to the embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the pressing block and the driving assembly according to the embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall structure of the pressing block according to the embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the main body part according to the embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the pressing part according to the embodiment of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the limit pin according to the embodiment of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the mold core according to the embodiment of the present invention.

[0030] Description of the reference numerals:

[0031] 10. Workbench; 20. Mold core; 21. Vent groove; 30. Limit pin; 31. Pressure-limiting part; 32. Guide part; 40. Pressing block; 41. Pressing surface; 42. Working hole; 43. Main body part; 431. Tenon groove; 44. Pressing part; 441. Tenon head; 442. Groove; 45. Guide hole; 50. Driving assembly; 51. Driving cylinder; 52. Connecting piece; 53. Base; 60. Support column; 70. Bottom plate. Detailed implementation manners

[0032] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] The following will be combined with Figures 1 to 7 , to describe the embodiments of the present utility model.

[0034] According to an embodiment of the present utility model, a processing and fixing device is provided, which includes a workbench 10, a mold core 20, a limit pin 30 and a pressing block 40. The mold core 20 is arranged on the workbench 10. A sleeving position is formed on the outer wall of the mold core 20. An exhaust groove 21 is formed on the outer wall of the mold core. The exhaust groove 21 is arranged corresponding to the sleeving position and extends out of the sleeving position; the limit pin 30 is arranged on the workbench 10; the pressing block 40 is movably arranged on the workbench 10. A pressing surface 41 is formed on the pressing block 40. A working hole 42 is formed on the pressing surface 41. The working hole 42 penetrates through the pressing block 40. The pressing block 40 has a pressing state and an open state. In the pressing state, the pressing surface 41 approaches the mold core 20 so that the pressing block 40 presses the workpiece to be processed against the sleeving position. The pressing block 40 abuts against the limit pin 30. The working hole 42 is arranged corresponding to the mold core 20; in the open state, the pressing surface 41 is away from the mold core 20.

[0035] By applying the processing and fixing device of this embodiment, by forming the exhaust groove 21 on the mold core 20, when the workpiece to be processed is sleeved on the mold core 20, the gas between the workpiece to be processed and the mold core 20 is discharged outward through the exhaust groove 21, so as to ensure that the inner wall of the workpiece to be processed is closely attached to the mold core 20 without reducing the size of the mold core 20, thereby improving the positioning accuracy of the hole opening; by arranging the limit pin 30, in the pressing state, the limit pin 30 abuts against the pressing block 40, preventing the pressing block 40 from pressing the workpiece to be processed excessively and avoiding damaging the workpiece to be processed.

[0036] Specifically, in this embodiment, the mold core 20 has a columnar structure, and the exhaust groove 21 is formed on the side surface of the mold core 20.

[0037] It should be noted that along the vertical direction, the length of the workpiece to be processed is less than or equal to the length of the sleeving position, and the exhaust groove 21 is arranged corresponding to the sleeving position and extends out of the sleeving position, that is, the length of the exhaust groove 21 is greater than the length of the sleeving position, so as to ensure that the gas between the workpiece to be processed and the mold core 20 can be discharged smoothly.

[0038] It should be noted that if the length of the exhaust groove 21 is less than the length of the sleeving position, it may occur that the workpiece to be processed completely covers the exhaust groove 21, resulting in the occurrence of air entrapment phenomenon.

[0039] It should be noted that a plurality of exhaust grooves 21 can be formed to ensure the exhaust capacity.

[0040] It should be noted that after the workpiece to be processed is positioned and fixed by the processing fixing device, the surface of the workpiece to be processed is perforated by the perforating device passing through the working hole 42.

[0041] In one embodiment, as Figure 1 and Figure 2 shown, the processing fixing device further includes a driving assembly 50, the driving assembly 50 is arranged on the workbench 10, and the driving assembly 50 is in transmission connection with the pressing block 40.

[0042] In one embodiment, as Figure 2 shown, the driving assembly 50 includes a driving cylinder 51 and a connecting piece 52. One end of the pressing block 40 forms a pressing surface 41. The other end of the pressing block 40 is hinged to the piston rod of the driving cylinder 51. The first end of the connecting piece 52 is fixedly arranged, and the second end of the connecting piece 52 is hinged between the two ends of the pressing block 40. The driving cylinder 51 has a simple structure and reliable operation. When realizing reciprocating motion, a speed reduction device can be omitted, and there is no transmission gap, thereby ensuring the movement smoothness of the pressing block 40.

[0043] Specifically, the connecting piece 52 and the pressing block 40 are hinged to form a lever structure, and the piston rod of the driving assembly 50 drives the other end of the pressing block 40 to move, so as to control the pressing surface 41 to approach or move away from the mold core 20.

[0044] Specifically, in this embodiment, the driving cylinder 51 is a pneumatic cylinder.

[0045] Of course, in other alternative embodiments, the driving cylinder 51 can also be an oil cylinder, an electric cylinder, etc.

[0046] In other embodiments, the driving assembly 50 only includes a driving cylinder 51. The piston rod of the driving cylinder 51 is connected to the pressing block 40. The pressing surface 41 of the pressing block 40 is arranged parallel to the surface of the workbench 10. The piston rod of the driving cylinder 51 drives the pressing block 40 to move up and down perpendicular to the surface of the workbench 10.

[0047] In one embodiment, as Figure 2 shown, the driving assembly 50 further includes a base 53 which is fixedly arranged. The first end of the connecting piece 52 is connected to the base 53. By connecting the connecting piece 52 to the base 53, the connection angle between the connecting piece 52 and the base 53 can be adjusted to meet the usage requirements of different pressing blocks 40, thereby improving the applicability of the device.

[0048] Specifically, the base 53 is fixedly connected to the cylinder block of the driving cylinder 51.

[0049] In other alternative embodiments, the base 53 can also be fixedly connected to the workbench 10.

[0050] In one embodiment, as Figure 3 shown, the pressing block 40 includes a main body part 43 and a pressing part 44. The pressing part 44 is detachably connected to one side of the main body part 43. The main body part 43 is movably arranged on the workbench 10. The surface of the pressing part 44 away from the main body part 43 forms a pressing surface 41. The detachable connection between the main body part 43 and the pressing part 44 facilitates the replacement of the pressing part 44 and the maintenance of the structure of the pressing block 40.

[0051] Specifically, the main body part 43 and the pressing part 44 are detachably connected by bolts.

[0052] In other embodiments, the main body part 43 and the pressing part 44 can also be integrally formed.

[0053] It should be noted that for the pressing block 40, since the pressing surface 41 is in contact with the workpiece to be processed for a long time, this part is subject to large wear. If the main body part 43 and the pressing part 44 are integrally formed, when maintaining the structure of the pressing block 40, the entire pressing block 40 needs to be disassembled, resulting in a large amount of disassembly work. Therefore, it is preferred that the main body part 43 and the pressing part 44 are detachably connected.

[0054] In one embodiment, as Figure 4 and Figure 5 shown, a mortise groove 431 is formed on the main body part 43, and a tenon 441 protrudes from the pressing part 44. The tenon 441 is embedded in the mortise groove 431. Through the tight engagement of the mortise groove 431 and the tenon 441, the relative movement between the main body part 43 and the pressing part 44 is prevented, improving the connection stability between the main body part 43 and the pressing part 44.

[0055] Specifically, please refer to Figure 4 andFigure 5 On the main body part 43, a mortise groove 431 is provided in each of the transverse and longitudinal directions, and a tenon 441 on the pressing part 44 is also correspondingly provided in each of the transverse and longitudinal directions.

[0056] It should be noted that by providing mortise and tenon structures in each of the transverse and longitudinal directions, the relative movement of the main body part 43 and the pressing part 44 in the longitudinal and transverse directions is restricted; and then by bolts, the relative movement of the main body part 43 and the pressing part 44 in the up and down direction is restricted, ensuring the connection stability of the main body part 43 and the pressing part 44.

[0057] In one embodiment, as Figure 3 shown, a groove 442 is provided on the side of the pressing part 44 away from the main body part 43, and the groove 442 communicates with the working hole 42. In the pressed state, the groove wall of the groove 442 is adapted to be in close contact with the workpiece to be processed. By providing the groove 442 on the pressing part 44, the positioning accuracy of the pressing block 40 is further improved.

[0058] Specifically, the shape of the groove 442 corresponds to the outer shape of the workpiece to be processed.

[0059] In one embodiment, the pressing part 44 is an elastic structure. The pressing part 44 being an elastic structure can prevent the pressing part 44 from being pressed down excessively and avoid damaging the workpiece to be processed.

[0060] Specifically, in this embodiment, the pressing part 44 is a urethane rubber plate body.

[0061] Of course, in other alternative embodiments, the pressing part 44 can also select other elastic structures.

[0062] In one embodiment, as Figure 6 shown, the limit pin 30 includes a pressure limiting part 31 and a guiding part 32. The pressure limiting part 31 is arranged on the workbench 10, and the guiding part 32 is connected to the end of the pressure limiting part 31 away from the workbench 10. A guiding hole 45 is provided on the pressing block 40. In the pressed state, the guiding part 32 is inserted into the guiding hole 45, and the pressure limiting part 31 abuts against the pressing block 40. Through the arrangement of the guiding part 32 and the guiding hole 45, when the pressing block 40 is pressed down, the guiding part 32 enters the guiding hole 45 to further limit the pressing block 40. On the basis of realizing the pressure limiting function of the limit pin 30, the guiding function is also realized, improving the opening positioning accuracy.

[0063] In other embodiments, the limit pin 30 can also only include the guiding part 32. A guiding groove is provided on the pressing block 40. When the pressing block 40 is pressed down, guiding and positioning are realized by inserting the guiding part 32 into the guiding groove, and the limiting function is realized by the bottom of the guiding groove abutting against the guiding part 32.

[0064] In one embodiment, as Figure 1As shown, the processing fixture further includes support columns 60 and a bottom plate 70. A plurality of support columns 60 are provided. One end of each support column 60 is connected to the workbench 10, and the other end of each support column 60 is connected to the bottom plate 70.

[0065] In this embodiment, the number of exhaust grooves 21 on one mold core 20 can be selected as four. The four exhaust grooves 21 are evenly arranged along the circumferential direction of the mold core 20. Multiple groups of fixing jigs can be arranged on one workbench 10. Each group of fixing jigs includes a pressing block 40, a mold core 20, a limit pin 30, and a driving assembly 50.

[0066] In this embodiment, a plurality of mold cores 20 can be provided. A plurality of working holes 42 can be formed in one pressing block 40. The plurality of mold cores 20 are arranged in one-to-one correspondence with the plurality of working holes 42.

[0067] When applying the processing fixture of this embodiment to fix and drill a workpiece to be processed, first, the workpiece to be processed is sleeved on the mold core 20; then, the driving cylinder 51 is started. The piston rod of the driving cylinder 51 drives the pressing block 40 to rotate and approach the mold core 20. The guiding portion 32 of the limit pin 30 enters the guiding hole 45 of the pressing block 40. The pressing block 40 abuts against the pressure limiting portion 31 of the limit pin 30. The upper end of the workpiece to be processed is completely attached to the groove 442 of the pressing portion 44; finally, the workpiece to be processed is drilled through the working hole 42 by a drilling device.

[0068] When applying the processing fixture of this embodiment after the product is drilled, first, the drilling device is withdrawn, and the driving cylinder 51 is started. The piston rod of the driving cylinder 51 drives the pressing block 40 to rotate away from the mold core 20; then, the product is taken out from the mold core 20.

[0069] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A processing fixture, characterized in that Comprising: A workbench (10); A die core (20), arranged on the workbench (10), a sleeving position is formed on the outer wall of the die core (20), an exhaust groove (21) is formed on the outer wall of the die core, the exhaust groove (21) is arranged corresponding to the sleeving position and extends out of the sleeving position; A limit pin (30), arranged on the workbench (10); A pressing block (40), movably arranged on the workbench (10), a pressing surface (41) is formed on the pressing block (40), a working hole (42) is formed on the pressing surface (41), the working hole (42) penetrates through the pressing block (40), the pressing block (40) has a pressing state and an open state, in the pressing state, the pressing surface (41) approaches the die core (20) so that the pressing block (40) presses a workpiece to be processed on the sleeving position, the pressing block (40) abuts against the limit pin (30), and the working hole (42) is arranged corresponding to the die core (20); in the open state, the pressing surface (41) is away from the die core (20).

2. The processing and fixing device according to claim 1, characterized in that, The processing and fixing device further comprises a driving assembly (50), the driving assembly (50) is arranged on the workbench (10), and the driving assembly (50) is in transmission connection with the pressing block (40).

3. The processing and fixing device according to claim 2, characterized in that, The driving assembly (50) comprises a driving cylinder (51) and a connecting piece (52), one end of the pressing block (40) forms the pressing surface (41), the other end of the pressing block (40) is hinged to the piston rod of the driving cylinder (51), the first end of the connecting piece (52) is fixedly arranged, and the second end of the connecting piece (52) is hinged between the two ends of the pressing block (40).

4. The processing and fixing device according to claim 3, characterized in that, The driving assembly (50) further comprises a base (53), the base (53) is fixedly arranged, and the first end of the connecting piece (52) is connected to the base (53).

5. The processing and fixing device according to any one of claims 1-4, characterized in that, The pressing block (40) comprises a main body part (43) and a pressing part (44), the pressing part (44) is detachably connected to one surface of the main body part (43), the main body part (43) is movably arranged on the workbench (10), and the surface of the pressing part (44) away from the main body part (43) forms the pressing surface (41).

6. The processing and fixing device according to claim 5, characterized in that, A mortise groove (431) is formed on the main body part (43), a tenon head (441) protrudes from the pressing part (44), and the tenon head (441) is embedded in the mortise groove (431).

7. The processing and fixing device according to claim 5, characterized in that, A groove (442) is formed on the side of the pressing part (44) away from the main body part (43), the groove (442) is communicated with the working hole (42), and in the pressing state, the groove wall of the groove (442) is suitable for fitting and abutting against the workpiece to be processed.

8. The processing and fixing device according to claim 5, characterized in that, The pressing part (44) is of an elastic structure.

9. The processing and fixing device according to any one of claims 1-4, characterized in that, The limit pin (30) includes a pressure-limiting portion (31) and a guiding portion (32). The pressure-limiting portion (31) is disposed on the workbench (10). The guiding portion (32) is connected to one end of the pressure-limiting portion (31) away from the workbench (10). A guiding hole (45) is formed in the pressing block (40). In the pressing state, the guiding portion (32) is inserted into the guiding hole (45), and the pressure-limiting portion (31) abuts against the pressing block (40).

10. The processing and fixing device according to any one of claims 1-4, characterized in that, The processing and fixing device further includes support columns (60) and a bottom plate (70). A plurality of support columns (60) are provided. One end of the support column (60) is connected to the workbench (10), and the other end of the support column (60) is connected to the bottom plate (70).

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