Self-centering tool clamp

Abstract

The utility model provides a self-centering tool clamp which comprises a pedestal and further comprises a plurality of pneumatic finger air cylinders arranged on the pedestal in a linear array mode, clamping mechanisms connected with pneumatic fingers in the pneumatic finger air cylinders and a positioning detection mechanism arranged on the pedestal. The clamping mechanism comprises a supporting block connected with the pneumatic finger and centering clamping blocks arranged on the supporting block in a swinging mode, the two centering clamping blocks oppositely clamp the two sides of a workpiece, and the positioning detection mechanism abuts against one end of the workpiece. According to the self-centering tool clamp, the centering clamping blocks of the multiple clamping mechanisms swing along the hinge seat, self-centering clamping of the tool clamp on a workpiece is achieved, clamping of the workpiece is firm and reliable, the clamping state of the workpiece is detected in real time through the detection block of the positioning detection mechanism, and the clamping efficiency is improved. The clamping state of the workpiece can be adjusted in real time, through combination of the clamping mechanism and the positioning detection mechanism, the requirement for clamping the workpiece is met, and the machining precision of the workpiece is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical manufacturing technical field, concretely relates to a self-centering tool fixture. BACKGROUND

[0002] Tool fixture refers to the device for fixing workpieces, keeping them in correct position to accept construction or detection, also called fixture. Its core functions include positioning, clamping, guiding tool direction, and may contain indexing device. In modern mechanical manufacturing field, tool fixture is one of the core equipment to realize efficient and accurate machining. The driving mode of fixture mainly includes screw rod clamping, hydraulic drive and pneumatic drive, etc.

[0003] Traditional tool fixture can meet basic positioning requirements. Mechanical clamping relies on manual adjustment or fixed stop block. Workpiece deviation may occur due to workpiece size tolerance or clamping deviation, affecting machining consistency and further affecting workpiece machining accuracy. The positioning detection device is relatively complex and cannot detect the clamping state of workpiece in real time, which cannot meet the requirements of workpiece clamping. The present scheme solves the above technical problems. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a self-centering tool fixture. The centering clamping blocks of multiple clamping mechanisms swing along the hinge seat, and multiple clamping parts clamp the workpiece, realizing self-centering clamping of the tool fixture on the workpiece. The clamping of the workpiece is firm and reliable. The detection block of the positioning detection mechanism presses the workpiece to detect the clamping state of the workpiece in real time, so that the clamping state of the workpiece can be adjusted in time. The combination of the clamping mechanism and the positioning detection mechanism meets the requirements of workpiece clamping and improves the machining accuracy of the workpiece.

[0005] To achieve the above purpose, the utility model takes the technical scheme that a self-centering tool fixture, including pedestal, still include a plurality of pneumatic finger cylinders that are arranged in a straight line array on the pedestal, the clamping mechanism that is connected with the pneumatic finger in the pneumatic finger cylinder, the positioning detection mechanism that is set up on the pedestal, the clamping mechanism includes the support block that is connected with the pneumatic finger, the centering clamping block that is swing set on the support block, two centering clamping blocks are opposite and clamped on both sides of the workpiece, the positioning detection mechanism abuts on one end of the workpiece.

[0006] The positioning detection mechanism includes a fixed block provided on the pedestal, a detection table provided on the fixed block in a liftable manner, and a detection block provided on one end of the detection table in a sliding manner. The detection table is provided with a through hole. One side of the detection block is provided with a boss. The boss is provided in the through hole in a sliding manner. The other side of the detection block abuts against the workpiece. The other end of the detection table is provided with a connecting sleeve in communication with the through hole. The connecting sleeve is connected with an air source.

[0007] The side of the detection block is provided with a detection hole, and the detection hole is in separable communication with the through hole through the boss.

[0008] The side of the detection table is provided with a connecting rod, the side of the fixed block is provided with a containing hole, the connecting rod is slidingly arranged in the containing hole, the side of the fixed block is provided with a locking hole in communication with the containing hole, and a locking bolt for locking the connecting rod is penetrated into the locking hole.

[0009] A compression spring is arranged in the containing hole and abuts against the bottom of the connecting rod.

[0010] The side of the detection table is provided with a guide rod, and the side of the detection block is provided with a guide hole, and the detection block is slidingly arranged on the guide rod through the guide hole.

[0011] The top side of the support block is provided with a hinged seat, the centering clamp block is swingingly arranged on the hinged seat through a pin shaft, and two clamping portions abutting against the side of the workpiece are arranged on the centering clamp block.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] (1) the centering clamp block of the plurality of clamping mechanisms swings along the hinged seat, the plurality of clamping portions clamp the workpiece, the self-centering clamping of the workpiece by the tool clamp is realized, the clamping of the workpiece is firm and reliable, the workpiece is pressed by the detection block of the positioning detection mechanism, the clamping state of the workpiece is detected in real time, and then the clamping state of the workpiece can be adjusted in time, the combination of the clamping mechanism and the positioning detection mechanism meets the demand of workpiece clamping, and the machining precision of the workpiece is improved.

[0014] (2) for workpieces of different sizes, in order to make the detection block abut against the workpiece firmly, the locking bolt is loosened, the connecting rod slides up and down in the containing hole, until the height of the detection block is located at the center of the workpiece and abuts against the workpiece firmly, then the locking bolt is tightened, so that the abutment of the detection block against the workpiece is more firm and reliable, and the applicability of the tool clamp is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic view of the utility model;

[0016] Figure 2 It is the combination structure schematic view of the positioning detection mechanism and the pedestal of the utility model;

[0017] Figure 3 It is the structure exploded schematic view of the positioning detection mechanism of the utility model;

[0018] Figure 4 is the sectional structure schematic diagram of the fixed block of the utility model;

[0019] Figure 5 is the sectional structure schematic diagram of the detection table of the utility model;

[0020] Figure 6 is the combination structure schematic diagram of the detection table and the detection block of the utility model;

[0021] Figure 7 is the structure schematic diagram of the support block of the utility model.

[0022] Among them, in the drawing: 1, pedestal; 2, pneumatic finger cylinder; 3, clamping mechanism; 31, support block; 311, hinged seat; 312, pin shaft; 32, centering clamp block; 321, clamping part; 4, positioning detection mechanism; 41, fixed block; 411, containing hole; 412, locking hole; 413, locking bolt; 414, compression spring; 42, detection table; 421, through hole; 422, connecting sleeve; 423, detection hole; 424, connecting rod; 43, detection block; 431, boss; 432, guide hole; 5, workpiece; 6, guide rod. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical features of the present scheme, the present scheme will be described below through specific embodiments.

[0024] Referring to Figures 1-7 , a self-centering tool clamp, comprising a pedestal 1, further comprising a plurality of pneumatic finger cylinders 2 arranged in a linear array on the pedestal 1, a clamping mechanism 3 connected with the pneumatic fingers in the pneumatic finger cylinders 2, a positioning detection mechanism 4 arranged on the pedestal 1, the clamping mechanism 3 comprising a support block 31 connected with the pneumatic fingers, a centering clamp block 32 swingingly arranged on the support block 31, two centering clamp blocks 32 are oppositely clamped on both sides of the workpiece 5, and the positioning detection mechanism 4 abuts against one end of the workpiece 5, wherein the pneumatic finger cylinder 2 is realized by using the prior art, which will not be described in detail here.

[0025] The positioning detection mechanism 4 includes a fixed block 41 mounted on a base 1, a detection platform 42 mounted on the fixed block 41 that can be raised and lowered, and a detection block 43 slidably mounted at one end of the detection platform 42. The detection platform 42 is provided with a through hole 421. A boss 431 is provided on one side of the detection block 43 and is slidably mounted inside the through hole 421. The other side of the detection block 43 abuts against the workpiece 5. A connecting sleeve 422 communicating with the through hole 421 is provided at the other end of the detection platform 42. More preferably, the connecting sleeve 422 is connected to an air pipe, and an air pressure sensor is provided on the air pipe. The air pressure sensor is connected to a warning light through a controller. The other end of the air pipe is connected to an air source such as an air pump. The air pipe, air pressure sensor, and warning light are all implemented using existing technology and are not shown in the attached drawings. This is hereby stated.

[0026] The side of the detection block 43 is provided with a detection hole 423, which is connected to the through hole 421 through the boss 431.

[0027] The side of the testing table 42 is provided with a connecting rod 424, the side of the fixing block 41 is provided with a receiving hole 411, the connecting rod 424 is slidably disposed in the receiving hole 411, the side of the fixing block 41 is provided with a locking hole 412 communicating with the receiving hole 411, and a locking bolt 413 for locking the connecting rod 424 is inserted into the locking hole 412.

[0028] A compression spring 414 is provided inside the receiving hole 411, and the compression spring 414 abuts against the bottom of the connecting rod 424.

[0029] The side of the testing table 42 is provided with a guide rod 6, and the side of the testing block 43 is provided with a guide hole 432. The testing block 43 is slidably mounted on the guide rod 6 through the guide hole 432.

[0030] The top side of the support block 31 is provided with a hinge seat 311, and the centering clamping block 32 is oscillatingly mounted on the hinge seat 311 via a pin 312. The centering clamping block 32 is provided with two clamping parts 321 that abut against the side of the workpiece 5.

[0031] The specific working process of this utility model:

[0032] In use, the workpiece 5 is placed between the two clamping mechanisms 3 of the pneumatic finger cylinder 2, and one end of the workpiece 5 is brought into contact with the detection block 43 of the positioning detection mechanism 4. The pneumatic finger cylinder 2 is activated, and the clamping parts 321 of the two opposing centering clamping blocks 32 in the clamping mechanism 3 clamp the workpiece 5. The workpiece 5 is clamped by the swing of multiple centering clamping blocks 32, and a self-centering effect is generated. Multiple clamping mechanisms 3 firmly clamp the workpiece 5. Then, the connecting sleeve 422 is connected to the air source. The gas generates pressure on the detection block 43 through the through hole 421. If the detection block 43 is in close contact with the workpiece 5, the detection block 43 will not slide along the guide hole 432, and the gas will not be discharged along the detection hole 423. At the same time, the air pressure sensor shows that the pressure remains constant, indicating that the workpiece 5 is clamped in place. Then the workpiece 5 can be processed. During the processing of the workpiece 5, the clamping status of the workpiece 5 is detected in real time by the positioning detection mechanism 4. If gas is found to be discharged from the detection hole 423, it means that the workpiece 5 is not clamped in place, and the workpiece 5 can be adjusted.

[0033] Furthermore, the air pressure sensor is connected to a warning light via a controller. When gas is discharged from the detection hole 423, the air pressure of the air pressure sensor decreases, and the warning light can also issue a warning signal to further indicate that the detection block 43 is not in close contact with the workpiece 5.

[0034] For workpieces 5 of different sizes, in order to make the detection block 43 abut against the workpiece 5 firmly, loosen the locking bolt 413 so that the connecting rod 424 slides up and down in the receiving hole 411 until the height of the detection block 43 is located at the center of the workpiece 5 and makes firm contact with the workpiece 5. Then tighten the locking bolt 413, so that the detection block 43 abuts against the workpiece 5 more firmly and reliably, and improves the applicability of the tooling fixture.

[0035] The centering blocks 32 of multiple clamping mechanisms 3 swing along the hinge seat 311, and multiple clamping parts 321 clamp the workpiece 5, realizing the self-centering clamping of the workpiece 5 by the tooling fixture. The clamping of the workpiece 5 is firm and reliable. The detection block 43 of the positioning detection mechanism 4 presses the workpiece 5 and detects the clamping state of the workpiece 5 in real time, so that the clamping state of the workpiece 5 can be adjusted in time. Through the combination of clamping mechanism 3 and positioning detection mechanism 4, the clamping requirements of workpiece 5 are met and the machining accuracy of workpiece 5 is improved.

[0036] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A self-centering tooling fixture, comprising a base (1), characterized in that, It also includes a plurality of pneumatic finger cylinders (2) arranged in a linear array on the base (1), a clamping mechanism (3) connected to the pneumatic fingers in the pneumatic finger cylinders (2), and a positioning detection mechanism (4) arranged on the base (1). The clamping mechanism (3) includes a support block (31) connected to the pneumatic fingers and a centering clamping block (32) swinging on the support block (31). The two centering clamping blocks (32) clamp the two sides of the workpiece (5) facing each other. The positioning detection mechanism (4) abuts against one end of the workpiece (5).

2. The self-centering tooling fixture according to claim 1, characterized in that, The positioning detection mechanism (4) includes a fixed block (41) set on the base (1), a detection platform (42) set on the fixed block (41) and a detection block (43) slidably set at one end of the detection platform (42). The detection platform (42) is provided with a through hole (421). A boss (431) is provided on one side of the detection block (43). The boss (431) is slidably set inside the through hole (421). The other side of the detection block (43) abuts against the workpiece (5). A connecting sleeve (422) communicating with the through hole (421) is provided at the other end of the detection platform (42). The connecting sleeve (422) is connected to an air source. The side of the detection block (43) is provided with a detection hole (423), and the detection hole (423) is detachably connected to the through hole (421) through the boss (431).

3. The self-centering tooling fixture according to claim 2, characterized in that, The side of the testing platform (42) is provided with a connecting rod (424), the side of the fixing block (41) is provided with a receiving hole (411), the connecting rod (424) is slidably disposed in the receiving hole (411), the side of the fixing block (41) is provided with a locking hole (412) communicating with the receiving hole (411), and a locking bolt (413) for locking the connecting rod (424) is inserted into the locking hole (412).

4. The self-centering tooling fixture according to claim 3, characterized in that, A compression spring (414) is provided inside the receiving hole (411), and the compression spring (414) abuts against the bottom of the connecting rod (424).

5. The self-centering tooling fixture according to claim 2, characterized in that, The side of the testing platform (42) is provided with a guide rod (6), and the side of the testing block (43) is provided with a guide hole (432). The testing block (43) is slidably mounted on the guide rod (6) through the guide hole (432).

6. The self-centering tooling fixture according to claim 1, characterized in that, The top side of the support block (31) is provided with a hinge seat (311), and the centering clamp (32) is swayed on the hinge seat (311) by a pin (312). The centering clamp (32) is provided with two clamping parts (321) that abut against the side of the workpiece (5).

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