Automatic reset turning clamp

Abstract

The utility model relates to an automatic reset turning clamp which is characterized in that a positioning block is arranged on a flange plate, a part clamping groove used for containing a machined part is formed in the positioning block, a pressing plate matched with the positioning block is arranged on one side of the positioning block, and the pressing plate and the positioning block form clamping force on the part together; a pressing claw matched with the pressing plate is arranged on one side of the pressing plate, a detachable positioning pin is arranged in the positioning block, the positioning pin is arranged in the part clamping groove in a penetrating mode and used for limiting rotation of the machined part, and a reset spring is arranged between the positioning pin and the pressing plate. In the clamping process, the pressing claw and the pressing plate slide in the direction of the positioning block along with the plug pin, a part is completely clamped, after machining is completed, the pressing claw efficiently and rapidly loosens the part along with the reset spring, clamping force distribution is effectively improved, vibration is relieved, the service life of a cutter is prolonged, product machining precision is improved, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe processing technical field, specifically a kind of automatic reset lathe fixture, more particularly to a kind of special fixture for high-efficiency linkage clamping and automatic reset in lathe. BACKGROUND

[0002] In prior art, some special-shaped parts need to be machined separately in turning process, and the commonly used method is to position and clamp the machining part and complete the machining, and such positioning and clamping method usually causes the following defects:

[0003] 1. The precision of the machined product is reduced due to the use of surface positioning method;

[0004] 2. The clamping force distribution of the fixture is not scientific, which causes vibration and roughness of the parts during machining;

[0005] 3. The tool life is low, and the production cost is increased;

[0006] 4. The vibration leads to low production efficiency;

[0007] 5. The equipment runs for a long time, increasing the production cost;

[0008] 6. The clamping is inconvenient, and the production cost is increased.

[0009] Therefore, there is an urgent need in the market for a new lathe fixture that can provide machining precision of parts and improve production efficiency. SUMMARY

[0010] The utility model discloses an improved automatic reset lathe fixture, which can realize complete clamping of the machined parts through structural improvement, and the fixture is automatically reset after machining, effectively improving the clamping force distribution, reducing vibration, and improving the machining precision of products and production efficiency.

[0011] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: an automatic reset lathe fixture includes a flange plate, characterized in that: a positioning block is arranged on the flange plate, a part clamping groove for placing the machined parts is arranged on the positioning block, a pressing plate matched with the positioning block is arranged on one side of the positioning block, and the pressing plate and the positioning block form a clamping force on the parts; a pressing jaw matched with the pressing plate is arranged on one side of the pressing plate, a detachable positioning pin is arranged in the positioning block, the positioning pin is arranged in the part clamping groove to limit the rotation of the machined parts, and a reset spring is arranged between the positioning pin and the pressing plate.

[0012] Preferably, the pressing jaw and the flange plate are slidably connected, and the flange plate is provided with a pressing jaw sliding groove matched with the pressing jaw; one side of the pressing plate abuts against the pressing jaw, and the other side is slidably connected with the positioning block through a latch.

[0013] Furthermore, the bottom of the part is provided with a positioning hole that mates with the positioning pin, and the bottom of the part slot is provided with a positioning opening that mates with the positioning pin, so that the positioning pin mates with the positioning hole in the part slot.

[0014] Furthermore, the positioning block is stepped, including a protrusion and a recess, and the protrusion and the recess are connected by an arc surface. The protrusion is provided with a part slot and a positioning pin hole that matches the position of the part slot. The positioning pin hole is used to pass through the positioning pin.

[0015] Furthermore, its recessed portion is provided with a set of fixing holes, which are fixedly connected to the flange by setting hexagonal screws in the fixing holes.

[0016] Furthermore, one end of the pressure claw has an outwardly protruding pressure end that fits against the pressure plate, and the position of the pressure end corresponds to the position of the return spring. The pressure claw is connected to the machine tool spindle power head by bolts.

[0017] Compared with the prior art, the technical solution of this utility model not only improves the overall technical solution, but also includes many detailed improvements. Specifically, it has the following beneficial effects:

[0018] 1. The improved solution of this utility model is provided with a positioning block on the flange, and a part slot for placing the workpiece on the positioning block. A pressure plate that cooperates with the positioning block is provided on one side of the positioning block. The pressure plate and the positioning block together form a clamping force on the workpiece. A pressure claw that cooperates with the pressure plate is provided on one side of the pressure plate. A detachable positioning pin is provided in the positioning block. The positioning pin passes through the part slot to limit the rotation of the workpiece. This device can not only quickly and accurately clamp the workpiece, but also position and limit the workpiece from multiple directions, ensuring the effectiveness and stability of clamping, and improving the accuracy and efficiency of subsequent processing.

[0019] 2. In the technical solution of this utility model, a return spring is provided between the positioning pin and the pressure plate. By setting the return spring, the pressure plate can quickly release the part after the part is processed, while leaving enough operating space to facilitate the quick removal of the part, thereby improving work efficiency and enabling the fixture to automatically complete the reset.

[0020] 3. In the structure of this utility model, the bottom of the part is provided with a positioning hole that cooperates with the positioning pin, and the bottom of the part slot is provided with a positioning opening that cooperates with the positioning pin. This allows the positioning pin to cooperate with the positioning hole in the part slot, ensuring that the part is not only subjected to clamping force in the part slot, but also will not rotate axially. This ensures stability and firmness during clamping, and provides convenience for subsequent processing.

[0021] 4. This utility model has a simple structure, reasonable layout, and is easy to use, which improves work efficiency and facilitates its promotion and utilization. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of a specific embodiment of the present utility model.

[0024] Figure 3 for Figure 2 A schematic diagram of the AA direction.

[0025] Figure label:

[0026] 1. Flange, 2. Pressure claw, 3. Pressure plate, 4. Locating pin, 5. Locating block, 6. Return spring, 7. Parts;

[0027] 21. Pressure end. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] This utility model provides an automatic reset carriage clamp, including a flange 1, see details below. Figure 1 The difference between this and the existing technology is that: a positioning block 5 is provided on the flange, and a part slot for placing the workpiece 7 is provided on the positioning block. A pressure plate 3 that cooperates with the positioning block is provided on one side of the positioning block. The pressure plate and the positioning block together form a clamping force on the workpiece. A pressure claw 2 that cooperates with the pressure plate is provided on one side of the pressure plate. A detachable positioning pin 4 is provided inside the positioning block. The positioning pin passes through the part slot to limit the rotation of the workpiece. A return spring 6 is provided between the positioning pin and the pressure plate.

[0030] In operation, the machine tool spindle power head is activated. Under hydraulic clamping force, the clamping jaws, together with the positioning block, clamp the workpiece. During clamping, the clamping jaws and pressure plate slide towards the positioning block along with the pins, achieving complete clamping of the workpiece. After machining is complete, the clamping jaws efficiently and quickly release the workpiece with the return spring. This effectively improves clamping force distribution, reduces vibration, increases tool life, improves product machining accuracy, and increases production efficiency. The hydraulic system used in the machine tool spindle power head is existing technology; its specific working principle and connection relationships will not be elaborated upon here.

[0031] Example 1

[0032] In this embodiment, a positioning block 5 is provided on the flange, and a part slot for placing the workpiece is provided on the positioning block. A pressure plate 3 is provided on one side of the positioning block to cooperate with the positioning block. The pressure plate and the positioning block together form a clamping force on both sides of the workpiece. A clamping claw 2 is provided on one side of the pressure plate to cooperate with it. Under the action of the clamping claw, the pressure plate and the positioning block are tightly fitted, increasing the clamping force on the workpiece. A detachable positioning pin is provided inside the positioning block. The positioning pin passes through the part slot to limit the rotation of the workpiece. A return spring is provided between the positioning pin and the pressure plate.

[0033] Specifically, the clamping claw and the flange are slidably connected, and the flange is provided with a clamping claw groove that mates with the clamping claw; one side of the pressure plate abuts against the clamping claw, and the other side is slidably connected to the positioning block through a pin. When the clamping claw applies pressure, the clamping claw exerts a pushing force on the pressure plate, causing the pressure plate to slide along the direction of the pin, thus forming an effective clamping of the part between the pressure plate and the positioning block.

[0034] Furthermore, the bottom of the part is provided with a positioning hole that mates with the positioning pin 4, and the bottom of the part slot is provided with a positioning opening that mates with the positioning pin, so that the positioning pin 4 mates with the positioning hole in the part slot. This restricts the rotation of the part and ensures that the part maintains its axial position during clamping and processing, making the clamping process stable and secure.

[0035] The positioning block 5 is stepped, including a protrusion and a recess, which are connected by an arc surface. The protrusion has a part slot and a positioning pin hole that matches the part slot. The positioning pin hole is used to pass a positioning pin. The recess has a set of fixing holes, which are used to fix the block to the flange by inserting hexagonal screws into the fixing holes.

[0036] Furthermore, one end of the pressure claw is provided with an outwardly protruding pressure end 21, which is in contact with the pressure plate. The position of the pressure end corresponds to the position of the return spring. The pressure claw is connected to the machine tool spindle power head by bolts.

[0037] Example 2

[0038] In this embodiment, the flange 1 is provided with a positioning block 5, which has a part slot for placing the workpiece. A pressure plate 3, which cooperates with the positioning block, is provided on one side of the positioning block. The pressure plate and the positioning block together form a clamping force on both sides of the workpiece. A clamping claw is provided on one side of the pressure plate, which, under the action of the clamping claw, ensures a tight fit between the pressure plate and the positioning block, increasing the clamping force on the workpiece 7. A detachable positioning pin is provided inside the positioning block, passing through the part slot to restrict the rotation of the workpiece. A return spring is provided between the positioning pin and the pressure plate. This positioning pin structure allows for flexible positioning of the workpiece. The front diameter of the positioning pin is 12*49mm.

[0039] During use, the positioning hole of the workpiece is fully inserted into the positioning pin, and the workpiece's reference surface is tightly against the end face of the fixture, with the workpiece's profile tightly against the fixture's positioning block. Then, the equipment's hydraulic system is activated, causing the workpiece to automatically align under the clamping force of the jaws, achieving complete workpiece positioning and clamping. Next, the equipment's machining program is started and the machining process is completed; the fixture releases workpiece 7, and the return spring 6 automatically releases the jaws 2, improving the workpiece removal time; finally, the workpiece is removed from the fixture, completing this turning operation.

[0040] The fixture of this invention can effectively improve the clamping force distribution, reduce vibration, increase tool life, improve product machining accuracy, improve part contour, and the return spring can efficiently and quickly release the part, thereby improving production efficiency.

[0041] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. An automatic reset fixture, comprising a flange, characterized in that: The flange is equipped with a positioning block, which has a part slot for placing the workpiece. A pressure plate that cooperates with the positioning block is located on one side of the positioning block. The pressure plate and the positioning block together form a clamping force on the workpiece. A pressure claw that cooperates with the pressure plate is located on one side of the pressure plate. A detachable positioning pin is located inside the positioning block. The positioning pin passes through the part slot to limit the rotation of the workpiece. A return spring is located between the positioning pin and the pressure plate.

2. The automatic reset fixture according to claim 1, characterized in that: The pressure claw and the flange are slidably connected. The flange is provided with a pressure claw groove that mates with the pressure claw. One side of the pressure plate abuts against the pressure claw, and the other side is slidably connected to the positioning block through a pin.

3. The automatic reset fixture according to claim 1, characterized in that: The bottom of the part has a positioning hole that mates with the positioning pin, and the bottom of the part slot has a positioning opening that mates with the positioning pin, so that the positioning pin mates with the positioning hole in the part slot.

4. The automatic reset fixture according to claim 1, characterized in that: The positioning block is stepped, including a protrusion and a recess. The protrusion and the recess are connected by an arc surface. The protrusion is provided with a part slot and a positioning pin hole that matches the position of the part slot. The positioning pin hole is used to pass through the positioning pin.

5. An automatic reset fixture according to claim 4, characterized in that: Its recessed part is provided with a set of fixing holes, which are fixedly connected to the flange by setting the internal hexagon screws in the fixing holes.

6. The automatic reset fixture according to claim 1, characterized in that: One end of the pressure claw has an outwardly protruding pressure end that fits against the pressure plate, and the position of the pressure end corresponds to the position of the return spring.

7. The automatic reset fixture according to claim 1, characterized in that: The pressure claw is connected to the machine tool spindle power head by bolts.

Images