Positioning jig for CNC machining of high-precision parts

Abstract

The utility model discloses a positioning jig for CNC (computer numerical control) machining of high-precision parts. A mold plate is fixedly connected to the top of the jig body, fixing boxes are fixedly connected to the left side and the right side of the top of the jig body, a workpiece is clamped to the top of the mold plate, and a demolding mechanism is transversely and fixedly connected to the bottom of an inner cavity of each fixing box. Through the arrangement of the demolding mechanism, the rotary table can be manually rotated, the rotary table rotates to drive the screw rod to rotate, the screw rod rotates to enable the shaft sleeve to move forwards, the shaft sleeve moves forwards to enable the movable rod to rotate with the rotary shaft as the center and push the U-shaped plate to move upwards, and the U-shaped plate moves upwards to drive the connecting plate and the sliding block to move synchronously. The sliding block stably moves along the surface of the vertical plate, the contact plate moves along with the sliding block, and finally the contact plate moves upwards to push the workpiece to move upwards to be separated from the surface of the mold plate to achieve the demolding effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to CNC fixture technical field, concretely is a kind of positioning fixture for high-precision parts CNC machining. BACKGROUND

[0002] CNC fixture is the auxiliary tool for numerical control machining center CNC, mainly used to assist control position, action or both in machining process.

[0003] In the machining of various mechanical parts, such as shaft, disc, box type parts, etc., CNC fixture is widely used in milling, turning, drilling, boring and other machining processes to ensure the dimensional accuracy and geometric tolerance of parts. Most of the existing CNC fixtures use clamping jaws, bolts and other methods to clamp and fix workpieces. This method is relatively cumbersome to operate and cannot quickly demold and take materials during material replacement, reducing the convenience of using CNC fixtures.

[0004] Therefore, it is necessary to design and improve the CNC fixture to effectively prevent the problems of clamping and fixing workpieces using clamping jaws, bolts and other methods, which is relatively cumbersome to operate and cannot quickly demold and take materials during material replacement. SUMMARY

[0005] To solve the problems raised in the background art, the purpose of the present utility model is to provide a positioning jig for high-precision parts CNC machining, which has the advantage of convenient demolding and material taking, and solves the problem of clamping and fixing workpieces using clamping jaws, bolts and other methods, which is relatively cumbersome to operate and cannot quickly demold and take materials during material replacement.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a positioning jig for high-precision parts CNC machining, comprising:

[0007] jig body;

[0008] The top of the jig body is fixedly connected with a template, and the left and right sides of the top of the jig body are fixedly connected with a fixed box. The top of the template is clamped with a workpiece, and the bottom of the inner cavity of the fixed box is fixedly connected with a demolding mechanism transversely.

[0009] The demolding mechanism comprises a fixed plate, a screw rod, a rotating disc, a shaft sleeve, a movable rod, a U-shaped plate, a connecting plate, a vertical plate, a sliding block and a contact plate, the bottom of the inner cavity of the fixed box is horizontally and fixedly connected with the fixed plate, the back end of the inner wall of the fixed box is movably connected with the screw rod through a bearing seat, the front end of the screw rod penetrates through the front end of the fixed box and is fixedly connected with the rotating disc, the surface of the screw rod and inside the fixed box movably sleeve-connects with the shaft sleeve, the top of the shaft sleeve movably connects with the movable rod through a rotating shaft, the end, away from the shaft sleeve, of the movable rod movably connects with the U-shaped plate through a shaft pin, the right side of the U-shaped plate is fixedly connected with the connecting plate, the front end and the back end of the inner cavity of the fixed box are longitudinally and fixedly connected with the vertical plate, the back end of the vertical plate slidingly sleeve-connects with the sliding block, the right side of the sliding block is fixedly connected with the contact plate, the right side of the contact plate penetrates through the right side of the fixed box, the top of the contact plate contacts the bottom of the workpiece, and the front end and the back end of the bottom of the inner wall of the fixed box are fixedly connected with a positioning mechanism.

[0010] As preferred in the utility model, the positioning mechanism comprises a vertical rod, a sliding plate, an extension rod, a fixed block, a pressing plate and a magnet piece, the front end and the back end of the bottom of the inner wall of the fixed box are fixedly connected with the vertical rod, the top of the vertical rod penetrates through the top of the fixed plate and fixedly sleeve-connects with the sliding plate, the front end and the back end of the right side of the sliding plate are fixedly connected with the extension rod, the right side of the extension rod is fixedly connected with the fixed block, the right side of the fixed block is fixedly connected with the pressing plate, the right side of the pressing plate penetrates through the right side of the fixed box, the bottom of the pressing plate is fixedly connected with the magnet piece, and the bottom of the magnet piece contacts the top of the workpiece.

[0011] As preferred in the utility model, the surface of the extension rod sleeve-connects with a spring, and the left side and the right side of the spring are fixedly connected with the right side of the sliding plate and the surface of the extension rod respectively.

[0012] As preferred in the utility model, the front end and the back end of the top of the fixed plate and sleeve-connected on the surface of the screw rod are fixedly connected with a fixed ring, and the fixed ring is used in cooperation with the screw rod.

[0013] As preferred in the utility model, the front end and the back end of the sliding plate are fixedly connected with a counterweight, and the counterweight is used in cooperation with the sliding plate.

[0014] As preferred in the utility model, the left side and the right side of the surface of the rotating disc are provided with anti-skid grooves, and the rotating disc is used in cooperation with the anti-skid grooves.

[0015] Compared with the prior art, the utility model has the advantages of the following:

[0016] 1. The utility model discloses a setting of demoulding mechanism can rotate the disc manually, and the disc rotation drives the screw rotation, and the screw rotation makes the shaft sleeve move forward, and the shaft sleeve moves forward and makes the movable rod rotate with the pivot as the center and pushes the U plate and moves up, and the U plate moves up and drives the connecting plate and the slider synchronous movement, and the slider moves stably along the surface of the vertical board and makes the contact plate follow the movement, and finally the contact plate moves up and pushes the workpiece and moves up and realizes the demoulding effect of the surface of the template. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the utility model;

[0018] Figure 2 It is the utility model Figure 1 It is the fixed box structure perspective view in the utility model;

[0019] Figure 3 It is the utility model Figure 2 It is the fixed plate, screw and disc structure perspective view in the utility model;

[0020] Figure 4 It is the utility model Figure 1 It is the template structure perspective view in the utility model.

[0021] In the drawing: 1, jig body; 2, template; 3, fixed box; 4, workpiece; 5, demoulding mechanism; 501, fixed plate; 502, screw; 503, disc; 504, shaft sleeve; 505, movable rod; 506, U plate; 507, connecting plate; 508, vertical board; 509, slider; 510, contact plate; 6, positioning mechanism; 61, vertical rod; 62, sliding plate; 63, telescopic rod; 64, fixed block; 65, pressing plate; 66, magnet piece; 7, spring; 8, fixed ring; 9, counterweight. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] As Figures 1 to 4 shown, the utility model provides a kind of positioning jig for high-precision parts CNC machining, including;

[0024] Jig body 1;

[0025] The top of the jig body 1 is fixedly connected with a template 2, the left side and the right side of the top of the jig body 1 are fixedly connected with fixed boxes 3, the top of the template 2 is clamped with a workpiece 4, the bottom of the inner cavity of the fixed box 3 is fixedly connected with a demolding mechanism 5 in a transverse direction;

[0026] The demolding mechanism 5 comprises a fixed plate 501, a screw rod 502, a rotating disc 503, a shaft sleeve 504, a movable rod 505, a U-shaped plate 506, a connecting plate 507, a vertical plate 508, a sliding block 509 and a contact plate 510, the bottom of the inner cavity of the fixed box 3 is fixedly connected with the fixed plate 501 in a transverse direction, the back end of the inner wall of the fixed box 3 is movably connected with the screw rod 502 through a bearing seat, the front end of the screw rod 502 is fixedly connected with the rotating disc 503 penetrating through the front end of the fixed box 3, the surface of the screw rod 502 and located in the inside of the fixed box 3 movably sleeves the shaft sleeve 504, the top of the shaft sleeve 504 is movably connected with the movable rod 505 through a rotating shaft, the end, away from the shaft sleeve 504, of the movable rod 505 is movably connected with the U-shaped plate 506 through a shaft pin, the right side of the U-shaped plate 506 is fixedly connected with the connecting plate 507, the front end and the back end of the inner cavity of the fixed box 3 are fixedly connected with the vertical plate 508 in a longitudinal direction, the back end of the vertical plate 508 slidingly sleeves the sliding block 509, the right side of the sliding block 509 is fixedly connected with the contact plate 510, the right side of the contact plate 510 penetrates through the right side of the fixed box 3, the top of the contact plate 510 is in contact with the bottom of the workpiece 4, and the front end and the back end of the bottom of the inner wall of the fixed box 3 are fixedly connected with a positioning mechanism 6.

[0027] Reference Figure 2 The positioning mechanism 6 comprises a vertical rod 61, a sliding plate 62, a telescopic rod 63, a fixed block 64, a pressing plate 65 and a magnet piece 66, the front end and the back end of the bottom of the inner wall of the fixed box 3 are fixedly connected with the vertical rod 61, the top of the vertical rod 61 fixedly sleeves the sliding plate 62 penetrating through the top of the fixed plate 501, the front end and the back end of the right side of the sliding plate 62 are fixedly connected with the telescopic rod 63, the right side of the telescopic rod 63 is fixedly connected with the fixed block 64, the right side of the fixed block 64 is fixedly connected with the pressing plate 65, the right side of the pressing plate 65 penetrates through the right side of the fixed box 3, the bottom of the pressing plate 65 is fixedly connected with the magnet piece 66, and the bottom of the magnet piece 66 is in contact with the top of the workpiece 4.

[0028] As a technical optimization scheme of the utility model, through the setting of the positioning mechanism 6, the movable pressing plate 65 can be driven to move to drive the fixed block 64 and the telescopic rod 63 to move synchronously, and the telescopic rod 63 is retracted to make the pressing plate 65 be accommodated in the inside of the fixed box 3.

[0029] Reference Figure 2 The surface of the telescopic rod 63 sleeves the spring 7, and the left side and the right side of the spring 7 are fixedly connected with the right side of the sliding plate 62 and the surface of the telescopic rod 63 respectively.

[0030] As a technical optimization scheme of the utility model, through the setting of spring 7, it can assist telescopic rod 63 to work, and at the same time, it plays the role of reset buffer, avoids telescopic rod 63 from being unable to reset after contraction, and causes the mechanical equipment to be unable to continuously work.

[0031] Reference Figure 3 The front end and the back end of the top of the fixed plate 501 are fixedly connected with the fixing ring 8 sleeved on the surface of the screw rod 502, and the fixing ring 8 is used in cooperation with the screw rod 502.

[0032] As a technical optimization scheme of the utility model, through the setting of the fixing ring 8, it can assist the screw rod 502 to work, and at the same time, it plays the role of fixing, avoids the screw rod 502 from appearing the phenomenon of shaking in the process of rotating.

[0033] Reference Figure 2 The front end and the back end of the sliding plate 62 are fixedly connected with the counterweight 9, and the counterweight 9 is used in cooperation with the sliding plate 62.

[0034] As a technical optimization scheme of the utility model, through the setting of the counterweight 9, it can assist the sliding plate 62 to work, and at the same time, it plays the role of balance, avoids the sliding plate 62 from appearing the phenomenon of tilting due to uneven force.

[0035] Reference Figure 3 The left side and the right side of the surface of the rotating disc 503 are both provided with anti-skid grooves, and the rotating disc 503 is used in cooperation with the anti-skid grooves.

[0036] As a technical optimization scheme of the utility model, through the setting of the rotating disc 503, it can increase the frictional resistance, avoids the rotating disc 503 from appearing the phenomenon of skidding in the process of rotating.

[0037] The working principle and use flow of the utility model are: when using, push the pressing plate 65 to move left, the pressing plate 65 moves left and drives the fixed block 64 and the telescopic rod 63 to move synchronously, the telescopic rod 63 contracts and compresses the spring 7, until the pressing plate 65 is stored in the inside of the fixed box 3, then the workpiece 4 is placed on the surface of the template 2 and the pressing plate 65 is loosened, the pressing plate 65 resets right with the telescopic rod 63, the pressing plate 65 resets and cooperates with the magnet sheet 66 to adsorb and fix the workpiece 4, when the workpiece 4 needs to be demolded, the pressing plate 65 is pushed back to the inside of the fixed box 3 and manually rotates the rotating disc 503, the rotating disc 503 rotates and drives the screw rod 502 to rotate, the screw rod 502 rotates and drives the shaft sleeve 504 to move forward along the thread direction, the shaft sleeve 504 moves forward and makes the movable rod 505 rotate around the pivot and pushes the U-shaped plate 506 to move upward, the U-shaped plate 506 moves upward and drives the connecting plate 507 and the sliding block 509 to move synchronously, the sliding block 509 stably rises along the surface of the vertical plate 508, the sliding block 509 moves upward and drives the contact plate 510 to move upward, the contact plate 510 moves upward and pushes the workpiece 4 to move upward and separate from the surface of the template 2, completing the demolding and taking material operation.

[0038] In summary: the positioning fixture for high-precision part CNC machining is used in cooperation with the jig body 1, the template 2, the fixed box 3, the workpiece 4, the demolding mechanism 5, the fixed plate 501, the screw rod 502, the rotating disc 503, the shaft sleeve 504, the movable rod 505, the U-shaped plate 506, the connecting plate 507, the vertical plate 508, the sliding block 509, the contact plate 510 and the positioning mechanism 6, solves the problem that the existing CNC fixture mostly adopts clamping jaws, bolts and the like to clamp and fix workpieces, and the operation is relatively cumbersome and cannot quickly demold and take materials during material replacement.

[0039] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present utility model have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for CNC machining of high-precision parts, characterized in that, include: Fixture body (1); The top of the fixture body (1) is fixedly connected to a template (2), and the left and right sides of the top of the fixture body (1) are fixedly connected to a fixing box (3). The top of the template (2) is clamped with a workpiece (4), and the bottom of the inner cavity of the fixing box (3) is horizontally fixedly connected to a demolding mechanism (5). The demolding mechanism (5) includes a fixed plate (501), a screw (502), a turntable (503), a bushing (504), a movable rod (505), a U-shaped plate (506), a connecting plate (507), a vertical plate (508), a slider (509), and a contact plate (510). The fixed plate (501) is horizontally fixedly connected to the bottom of the inner cavity of the fixed box (3). The screw (502) is movably connected to the back end of the inner wall of the fixed box (3) through a bearing seat. The front end of the screw (502) passes through the front end of the fixed box (3) and is fixedly connected to the turntable (503). The bushing (504) is movably sleeved on the surface of the screw (502) and inside the fixed box (3). The top of the bushing (504) is connected to the rotating shaft. A movable rod (505) is movably connected. The end of the movable rod (505) away from the bushing (504) is movably connected to a U-shaped plate (506) via a pin. A connecting plate (507) is fixedly connected to the right side of the U-shaped plate (506). A vertical plate (508) is longitudinally fixedly connected to the front and back ends of the inner cavity of the fixed box (3). A slider (509) is slidably sleeved on the back end of the vertical plate (508). A contact plate (510) is fixedly connected to the right side of the slider (509). The right side of the contact plate (510) penetrates the right side of the fixed box (3). The top of the contact plate (510) contacts the bottom of the workpiece (4). A positioning mechanism (6) is fixedly connected to the front and back ends of the bottom of the inner wall of the fixed box (3).

2. A positioning fixture for CNC machining of high-precision parts according to claim 1, characterized in that: The positioning mechanism (6) includes a vertical rod (61), a sliding plate (62), a telescopic rod (63), a fixing block (64), a pressure plate (65), and a magnetic piece (66). The front end and back end of the bottom of the inner wall of the fixing box (3) are fixedly connected to the vertical rod (61). The top of the vertical rod (61) passes through the top of the fixing plate (501) and is fixedly sleeved with the sliding plate (62). The front end and back end of the right side of the sliding plate (62) are fixedly connected to the telescopic rod (63). The right side of the telescopic rod (63) is fixedly connected to the fixing block (64). The right side of the fixing block (64) is fixedly connected to the pressure plate (65). The right side of the pressure plate (65) passes through the right side of the fixing box (3). The bottom of the pressure plate (65) is fixedly connected to the magnetic piece (66). The bottom of the magnetic piece (66) is in contact with the top of the workpiece (4).

3. A positioning fixture for CNC machining of high-precision parts according to claim 2, characterized in that: A spring (7) is fitted onto the surface of the telescopic rod (63), and the left and right sides of the spring (7) are fixedly connected to the right side of the slide plate (62) and the surface of the telescopic rod (63), respectively.

4. A positioning fixture for CNC machining of high-precision parts according to claim 1, characterized in that: The front and back ends of the top of the fixing plate (501) are fixedly connected to the surface of the screw (502) with fixing rings (8), which are used in conjunction with the screw (502).

5. A positioning fixture for CNC machining of high-precision parts according to claim 2, characterized in that: The front and back ends of the skateboard (62) are fixedly connected with counterweights (9), which are used in conjunction with the skateboard (62).

6. A positioning fixture for CNC machining of high-precision parts according to claim 1, characterized in that: The turntable (503) has anti-slip grooves on both the left and right sides of its surface, and the turntable (503) is used in conjunction with the anti-slip grooves.

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