CN103170847A - Workpiece clamp - Google Patents

Abstract

The invention discloses a workpiece fixture that can directly realize positioning without relying on workers through additional tooling, and overcomes the problem that the wire cutting fixture in the prior art must rely on additional tooling when locating the horizontal position of the workpiece. In the novel chopsticks holder, a water filter frame is provided at the lower end of the cylinder body, and the bottom of the cylinder body is connected with a water storage cup. The workpiece processing fixture described above comprises a base on which a reference seat plate and a sliding clamping plate arranged on the sliding clamping seat opposite to the reference surface of the reference seat plate, the sliding clamping seat and the base The seat is slidingly connected, the side of the sliding clamping seat is provided with a positioning bolt, and the positioning bolt is in close contact with the side of the base when it is tightened, and the side of the reference seat plate is provided with a limit plate that partially protrudes toward the direction of the sliding clamping seat , the surface of the limit plate close to the reference seat plate is perpendicular to the reference surface of the reference seat plate. The present invention is suitable for the occasions where the wire cutting fixture was used in the past, and has the advantages of fast clamping and loosening, clamping of multiple workpieces, and the like.

Description

A workpiece fixture

the

technical field

The invention belongs to the field of fixtures, in particular to a workpiece fixture for wire cutting.

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Background technique

Wire cutting technology is quite special in mechanical processing. It can not only process special-shaped process holes, but also complete processing methods that cannot be completed by general equipment with the least amount of cutting. Wire cutting technology also has higher requirements for fixtures. In the current wire cutting production, the workpiece to be processed is usually placed between the fixtures. If the fixture is clamped up and down, molybdenum wires are used to align to ensure the accuracy of the vertical direction, but the accuracy of the horizontal position needs to be guaranteed. Rely on additional positioning tooling; if the fixture is clamped in the horizontal direction, the positioning perpendicular to the clamping direction also needs to rely on additional positioning tooling to ensure that, otherwise, it is easy to appear problems such as the left and right clamping in place but the front and rear positioning is not in place. . Most of the existing wire cutting fixtures use thread structure to clamp the workpiece, so when the pitch is small, the distance moved by each rotation is very small, and the speed of clamping and loosening the workpiece is slow; when the pitch is large, If the distance moved by each rotation is large, there is no fine-tuning ability, and the clamping or loosening distance is relatively large each time it is rotated. If the surface of the clamped workpiece is easy to wear, it is prone to damage due to excessive clamping. On the other hand, the surface of the workpiece is prone to insufficient clamping. Therefore, it does not have the function of quickly clamping and loosening, and can also realize fine-tuning clamping.

Furthermore, when the workpiece is clamped, the surface of the workpiece cannot be guaranteed to be regular, so the contact point between the fixture and the workpiece cannot be guaranteed to be flat, straight or regular curve, so the actual clamping area of the fixture is very small , it is easy to cause loosening and workpiece position deflection, and when clamping multiple identical workpieces, there will inevitably be dimensional errors on the surface of each workpiece, so the current wire cutting fixture is not suitable for clamping multiple workpieces, otherwise It will cause some workpieces to be clamped, while some workpieces with a smaller size at the clamped position will not be clamped.

See the "wire cutting jig" disclosed in the Chinese patent literature, the announcement number of which is CN101704255A. The wire cutting jig includes a base and a pressing plate arranged on the top of the base. The bottom of the front end of the pressure plate is respectively provided with corresponding transverse notches, and the base and the notches of the pressure plate are combined to form a clamping groove for clamping the workpiece. When in use, adjust the distance between the pressure plate and the base by adjusting the screw to adjust The width of the clamping groove, the clamping groove can be adjusted to be suitable for workpieces of different thicknesses, the workpiece is placed in the clamping groove, the adjusting screw is tightened to clamp the workpiece, and the clamping process is completed.

See the "EDM clamp" disclosed in the Chinese patent literature, whose notification number is CN101837492A. The EDM clamp includes a bracket that can be connected to the EDM arm, and an upper connecting plate and a guide column are connected below the bracket. The guide column is connected with a movable plate that can move relative to the upper connecting plate, an insulating block is provided on the movable plate and insulated from the worktable of the EDM machine, an electrode rod is arranged on the movable plate, and an electrode rod is arranged at the end of the electrode rod. For processing electrodes, a linkage device is provided on the upper connecting plate and the movable plate, which can make the electrode rod produce an arc trajectory. The linkage device includes a rack on the upper connecting plate and a gear on the movable plate that engages with the rack. A cam is connected to the shaft of the gear, and the electrode rod is connected to the other end of the cam. An elastic piece for resetting the movable plate is arranged between the upper connecting plate and the movable plate.

Using the above-mentioned fixture to clamp the workpiece that needs to be processed by wire cutting still cannot solve the problem that the horizontal position positioning needs to rely on additional tooling and workers to observe the operation, so the labor intensity is relatively high, and it cannot be both fast clamping and loosening the workpiece, and at the same time. The clamping function can be fine-tuned, and the workpieces with irregular clamping surfaces cannot be guaranteed and it is difficult to clamp multiple workpieces at the same time.

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Contents of the invention

The purpose of the present invention is to solve the problem that the prior art wire cutting fixture must rely on additional tooling when positioning the horizontal position of the workpiece, and to provide a workpiece fixture that can directly achieve positioning without relying on workers through additional tooling.

Another object of the present invention is to solve the problem that the prior art wire-cutting clamps cannot not only quickly clamp and release the workpiece, but also have the function of fine-tuning clamping, and provide a fast clamping and loosening of the workpiece. , and can fine-tune the clamped workpiece fixture.

Another object of the present invention is to solve the problem that the existing wire cutting fixture is difficult to ensure that the clamping surface is relatively irregular workpieces and it is difficult to clamp multiple workpieces at the same time. Regular workpieces and workpiece fixtures that can clamp multiple workpieces at the same time.

The present invention is achieved through the following technical solutions:

A workpiece processing fixture, comprising a base, the base is provided with a reference seat plate and a sliding clamping plate on the sliding clamping seat opposite to the reference surface of the reference seat plate, the sliding clamping The seat and the base are slidingly connected, and the side of the sliding clamping seat is provided with positioning bolts, and the positioning bolts are in close contact with the side of the base in the tightened state, and the side of the reference seat plate is provided with a part facing The limit plate protruding in the direction where the sliding clamping seat is located, the surface of the limit plate close to the reference seat plate is perpendicular to the reference surface of the reference seat plate. The base is used to place the workpiece to be clamped. The sliding clamping plate can slide on the base with the sliding clamping seat. When the base plate and the sliding clamping plate are relatively close, the workpiece can be clamped, so the sliding clamp can be moved The holding seat makes the sliding clamping plate and the reference seat plate clamp the workpiece, and then tighten the positioning bolts on the side of the sliding clamping seat to fix the sliding clamping seat and the base, so that the sliding clamping connected with the sliding clamping seat The plate is also fixed so that the state of clamping the workpiece to be processed can be maintained. Since the clamping surface of the reference seat plate is the reference surface, the positioning of the workpiece in the clamping direction can be achieved naturally with the clamping action, and the positioning in the vertical direction in the same horizontal plane as the clamping direction can be achieved through the limit plate Realization, only need to put one end of the workpiece to be processed against the limit plate when the workpiece to be processed is placed between the reference seat plate and the sliding clamping plate, and then complete the above clamping steps, the workpiece to be processed can be realized in the horizontal plane The complete positioning within the machine can fully guarantee the accuracy of positioning without relying on other tools and worker observation.

As a preference, a number of strip holes are provided on the limiting plate, the length direction of the strip holes is parallel to the sliding direction of the sliding clamping seat, and there are strip holes corresponding to the strip holes on the reference seat plate. screw holes, the limit plate is threaded with the reference seat plate through the fastening bolts arranged in the strip holes. The limit plate can be moved. When the positioning is completed, the limit plate can be moved to the side of the reference seat plate, so that the processing parts and the like are not easy to interfere with the limit plate during wire cutting, and many workpieces will have a stepped structure. For example, for shaft workpieces with journals, sometimes the positioning surface of such workpieces is not necessarily the end, but may also be a step. Therefore, the extension distance of the limit plate can be adjusted according to the different positioning positions. When using the upper journal of the workpiece, etc. When positioning the structure, remove a small amount of the limit plate and fix it with fastening bolts, and then make the workpiece journal contact with the limit plate. When using the end face of the workpiece for positioning, move the limit plate more and fix it with fastening bolts. Make the end face touch the limit plate, so as to complete the positioning. When the positioning is completed and the workpiece to be processed is clamped, the fastening bolt can be loosened to reset the limit plate, and then the fastening bolt can be tightened.

Preferably, the side of the limiting plate close to the direction of the sliding clamping seat is a plane, and the height of the limiting plate is the same as that of the reference seat plate. The height of the limiting plate is the same as that of the reference seat plate so that there is enough contact area when positioning the workpiece to be processed, so as to ensure the accuracy of positioning.

As a preference, the sliding clamping seat and the sliding clamping plate are connected through a fine-tuning clamping mechanism, and the fine-tuning clamping mechanism includes a compression screw threadedly connected with the sliding clamping seat, and the compression screw is in a sliding position. One end between the clamping seat and the sliding clamping plate is provided with a pull plate that can move with the pressing screw rod, the moving direction of the pulling plate is parallel to the sliding direction of the sliding clamping seat, and the sliding clamping plate There are a number of vertical sliding slots on the top, and the sliding clamping seat is provided with a fixed plate corresponding to the number of sliding slots, and the fixed plate is provided with an L-shaped rotating plate hinged with the fixed plate. The two ends of the rotating plate are respectively provided with a sliding shaft and a slider, the sliding shaft is in the sliding groove, the slider is in contact with the pulling plate in the working state, and the rotating handle is provided with a limit head, so The above-mentioned rotating handle is connected with the pull plate in rotation. The sliding clamping seat is moved to drive the sliding clamping plate to slide, so that the distance between the sliding clamping plate and the reference seat plate is reduced or increased, and the workpiece can be quickly clamped or quickly released. The fine-tuning clamping mechanism can achieve further clamping of the workpiece, while the adjustment range is small. After the sliding clamping plate and the reference seat plate clamp the workpiece, turn the compression screw to move away from the direction of the sliding clamping plate, and the limit head at the end of the compression screw drives the pull plate to move away from the sliding clamping plate. When moving in the direction where the pull plate drives the slider, it also moves away from the direction where the sliding clamping plate is located. In this way, the sliding shaft on the upper rotating plate begins to move down along the chute, the rotating plate rotates counterclockwise, and pushes the sliding clamping plate to press against the reference seat plate during the rotation process; the lower rotating plate The sliding shaft on the top starts to move up along the chute, the rotating plate rotates clockwise, and pushes the sliding clamping plate to press against the reference seat plate during the rotating process, which realizes fine-tuning clamping, which can ensure further clamping of the workpiece , and will not cause damage to the surface of the workpiece due to excessive clamping at once.

Preferably, the sliding clamping plate is provided with an elastic clamping plate on the surface opposite to the reference seat plate, and the elastic clamping plate is made of polyurethane material. When clamping a single workpiece, if part of the surface of the workpiece is irregular, put the more regular part against the reference surface, and then move the sliding clamping plate to clamp the workpiece. The polyurethane material itself has a certain elasticity, and it acts as an elastic clamping plate When the workpiece is clamped, a small amount of deformation will occur and fit to the surface of the workpiece. In this way, the contact surface with the workpiece is greatly increased, ensuring a good clamping effect. When clamping the same multiple workpieces, a small amount of deformation will occur on the polyurethane plate. If the workpiece size is too small, the polyurethane plate will deform less in the clamping direction. If the workpiece size is too large, the polyurethane plate will deform in the clamping direction. If the amount is larger, it can ensure that all workpieces can be clamped, and there will be no problem that smaller workpieces cannot be clamped at the same time due to the existence of dimensional errors.

As a preference, the end of the compression screw away from the sliding clamping seat is provided with a rotating handle, the holding section of the rotation handle is cylindrical and parallel to the compression screw, and the thread on the compression screw is right-handed. thread. When it is necessary to clamp or loosen the workpiece, hold the turning handle, which can drive the compression screw to rotate with less effort, so that the screw can move away from or close to the direction of the sliding clamping plate.

Preferably, the positioning bolts are butterfly bolts with rotating fins. When loosening and tightening the positioning bolts, the operator can pinch the rotating wing to rotate, which saves effort when loosening, and it is easy for the operator to exert force when tightening, ensuring that the positioning bolts are fully tightened, so that the sliding clamping seat and the base It is completely fixed between them, that is to say, the overall stability after clamping is guaranteed.

Preferably, the lower end of the sliding clamping plate is in contact with the upper surface of the base, and the surface shape of the sliding clamping plate is corresponding to the reference seat plate. The sliding clamping frame rests on the base, so it will not hang in the air at any time, which can maintain the stability of the working state, and it is not easy to generate large vibrations during processing.

Therefore, the beneficial effects of the present invention are: (1) the limit plate can be moved, and multiple places on the workpiece can be selected as positioning reference parts for positioning; Clamp and loosen the workpiece, so it has the function of quickly clamping and releasing the workpiece, and can fine-tune the clamping; (3) It has a polyurethane plate auxiliary clamping mechanism, which can provide clamping when clamping a single or multiple workpieces. Sufficient clamping contact area to ensure sufficient clamping of the workpiece.

the

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the back structure of the present invention.

In the figure: base 1, reference seat plate 2, sliding clamping seat 3, sliding clamping plate 4, positioning bolt 5, limit plate 6, fastening bolt 7, compression screw 8, pulling plate 9, fixing plate 10 , Rotating plate 11, sliding shaft 12, slider 13, limit head 14, elastic clamping plate 15, rotating handle 16, rotating wing 17.

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Detailed ways

Below by embodiment, technical solution of the present invention is described further in conjunction with accompanying drawing:

A workpiece processing fixture as shown in Fig. 1 and Fig. 2 includes a base 1, and the base 1 is provided with a reference seat plate 2 and a sliding clamping seat opposite to the reference surface of the reference seat plate 2 3 on the sliding clamping plate 4, the sliding clamping seat 3 is slidingly connected with the base 1, and the side of the sliding clamping seat 3 is provided with a positioning bolt 5, and the positioning bolt 5 is in the tightened state Close to the side of the base 1, the side of the reference seat plate 2 is provided with a limit plate 6 that partially protrudes toward the direction of the sliding clamping seat 3, and the limit plate 6 is close to the base of the reference seat plate 2. The surface is perpendicular to the reference surface of the reference seat plate 2 . The limiting plate 6 is provided with a plurality of strip holes, the length direction of the strip holes is parallel to the sliding direction of the sliding clamping seat 3, and the reference seat plate 2 is provided with strip holes corresponding to the strip holes. The screw hole, the limit plate 6 is threadedly connected with the reference seat plate 2 through the fastening bolt 7 arranged in the strip hole. The limiting plate 6 can be moved. After the positioning is completed, the limiting plate 6 can be moved to the side range of the reference seat plate 2, so that the processing parts and the like are not easy to interfere with the limiting plate 6 during wire cutting, and many workpieces will For shaft workpieces with stepped structures such as journals, sometimes the positioning surface of such workpieces is not necessarily the end, but may also be a step. Therefore, the extension distance of the limit plate 6 can be adjusted according to the positioning position. When using When positioning the structure such as the journal on the workpiece, move out the limit plate 6 a little and fix it with the fastening bolt 7, and then make the workpiece journal contact with the limit plate 6. When using the end surface of the workpiece for positioning, the limit plate 6 Move out a little more and fix it with the fastening bolt 7, so that the end face can touch the limit plate 6, so as to complete the positioning. After the positioning is completed and the workpiece to be processed is clamped, the fastening bolt 7 can be loosened to reset the limiting plate 6, and then the fastening bolt 7 can be tightened. The side of the limiting plate 6 close to the direction of the sliding clamping seat 3 is a plane, and the height of the limiting plate 6 is the same as that of the reference seat plate 2 . The height of the limiting plate 6 is the same as that of the reference seat plate 2 so that there is enough contact area when positioning the workpiece to be processed, so as to ensure the accuracy of positioning. The sliding clamping seat 3 is connected to the sliding clamping plate 4 through a fine-tuning clamping mechanism, and the fine-tuning clamping mechanism includes a compression screw 8 threadedly connected with the sliding clamping seat 3, and the compression screw 8 One end between the sliding clamping seat 3 and the sliding clamping plate 4 is provided with a pull plate 9 that can move with the compression screw 8, and the moving direction of the pull plate 9 is parallel to the sliding direction of the sliding clamping seat 3 , the sliding clamping plate 4 is provided with four vertical sliding grooves, two sliding grooves are higher than the compression screw 8, two sliding grooves are lower than the compression screw 8, the sliding clamping seat 3 A fixed plate 10 corresponding to the number of sliding grooves is provided on the top, and an L-shaped rotating plate 11 hinged with the fixed plate 10 is provided on the fixed plate 10. The two ends of the rotating plate 11 are respectively provided with sliding shafts 12, The slider 13, the sliding shaft 12 is in the sliding groove, the slider 13 is in contact with the pull plate 9 in the working state, the rotating handle is provided with a limit head 14, and the rotating handle is in contact with the pulling plate 9. Plate 9 is pivotally connected. The sliding clamping plate 4 is provided with an elastic clamping plate 15 on the surface opposite to the reference seat plate 2, and the elastic clamping plate 15 is made of polyurethane material. The end of the compression screw 8 away from the sliding clamping seat 3 is provided with a rotating handle 16, the holding section of the rotation handle 16 is cylindrical, and is parallel to the compression screw 8, and the screw thread on the compression screw 8 It is a right-handed thread. When the workpiece needs to be clamped or loosened, hold the rotating handle 16, which can drive the compression screw 8 to rotate more labor-saving, so that the screw can move away from or close to the direction of the sliding clamping plate 4. The positioning bolt 5 is a butterfly bolt with a rotating vane 17 . When the operator loosens and tightens the positioning bolt 5, he can pinch the rotating wing 17 to rotate. It is relatively labor-saving when unscrewing. 3 and the base 1 are completely fixed, that is, the overall stability after clamping is ensured. The lower end of the sliding clamping plate 4 is in contact with the upper surface of the base 1 , and the surface shape of the sliding clamping plate 4 is corresponding to the reference seat plate 2 . The 4 sliding clamping plates lean against the base 1, so they will not be suspended at any time, can maintain a stable working state, and are not prone to problems such as large vibrations during processing.

When the workpiece needs to be clamped, place the workpiece to be processed between the sliding clamping plate 4 and the reference seat plate 2, loosen the fastening bolt 7, adjust the limit plate 6 to protrude, and place the positioning part of the workpiece to be processed against On the surface of the limiting plate 6, move the sliding clamping seat 3 so that the sliding clamping plate 4 and the reference seat plate 2 clamp the workpiece, and then tighten the positioning bolts 5 on the side of the sliding clamping seat 3 to make the sliding clamping seat 3 and the reference seat plate 2 clamp the workpiece. The bases 1 are fixed, so that the sliding clamping plate 4 connected to the sliding clamping seat 3 is also fixed, so that the state of clamping the workpiece to be processed can be maintained, and then the limiting plate 6 can be reset. The fine-tuning clamping mechanism can further clamp the workpiece, and at the same time, the adjustment range is much smaller than that of directly moving the sliding clamping seat 3, which can improve the adjustment accuracy. After the workpiece is clamped by the sliding clamping plate 4 and the reference seat plate 2, the screw 8 is rotated to move in a direction away from the sliding clamping plate 4, and the limit head 14 at the end of the clamping screw 8 drives the pull plate 9 moves away from the direction where the sliding clamping plate 4 is located, and the pulling plate 9 drives the slider 13 to move away from the direction where the sliding clamping plate 4 is located. In this way, the sliding shaft 12 on the upper rotating plate 11 begins to move down along the chute, and the rotating plate 11 rotates counterclockwise, and pushes the sliding clamping plate 4 to press against the reference seat plate 2 during the rotating process; The sliding shaft 12 on the rotating plate 11 below begins to move up along the chute, the rotating plate 11 rotates clockwise, and pushes the sliding clamping plate 4 to press against the reference seat plate 2 during the rotating process, which realizes fine adjustment Clamping can not only ensure further clamping of the workpiece, but also avoid damage to the surface of the workpiece due to excessive clamping. When clamping a single workpiece, if part of the surface of the workpiece is irregular, put the more regular part against the reference surface, and then move the sliding clamping plate 4 to clamp the workpiece. The polyurethane material itself has certain elasticity, which acts as an elastic clamp When the plate 15 clamps the workpiece, it will be deformed and attached to the surface of the workpiece. In this way, the contact surface with the workpiece is greatly increased, ensuring a good clamping effect. When clamping the same multiple workpieces, the polyurethane plate will also deform. If the workpiece size is too small, the polyurethane plate will have less deformation in the clamping direction. If the workpiece size is too large, the polyurethane plate will deform in the clamping direction. It is larger, but it can reach a sufficient area of contact with the workpiece, so that all workpieces can be pressed tightly, and there will be no problem that smaller workpieces cannot be clamped at the same time due to the existence of dimensional errors.

Claims (9)

1. workpiece clamp for machining, comprise pedestal (1), described pedestal (1) is provided with benchmark seat board (2) and relative with the reference surface of benchmark seat board (2) the slip grip block (4) of being located on slip grip slipper (3), it is characterized in that, described slip grip slipper (3) is slidably connected with pedestal (1), described slip grip slipper (3) side is provided with bolt (5), described bolt (5) is adjacent to pedestal (1) side under tight condition, described benchmark seat board (2) side is provided with the limiting plate (6) that part is stretched out towards slip grip slipper (3) place direction, described limiting plate (6) is vertical with the reference surface of benchmark seat board (2) near the surface of benchmark seat board (2).

2. a kind of workpiece clamp for machining according to claim 1, it is characterized in that, described limiting plate (6) is provided with some bar holes, described bar hole length direction is parallel with the glide direction of slip grip slipper (3), described benchmark seat board (2) is provided with the screw corresponding with bar hole, and limiting plate (6) is threaded with benchmark seat board (2) by the fastening bolt (7) that is arranged in bar hole.

3. a kind of workpiece clamp for machining according to claim 1, is characterized in that, described limiting plate (6) is the plane near the side of slip grip slipper (3) place direction, and described limiting plate (6) height is highly identical with benchmark seat board (2).

4. according to claim 1 and 2 or 3 described a kind of workpiece clamp for machining, it is characterized in that, described slip grip slipper (3) is connected by the fine setting clamp mechanism with slip grip block (4), described fine setting clamp mechanism comprises the clamping screw (8) that is threaded with slip grip slipper (3), described clamping screw (8) is in that an end between slip grip slipper (3) and slip grip block (4) is provided with can be along with the mobile arm-tie (9) of clamping screw (8), the moving direction of described arm-tie (9) is parallel with the glide direction of slip grip slipper (3), described slip grip block (4) is provided with some vertical sliding trays, described slip grip slipper (3) is provided with the fixed head corresponding with the sliding tray number (10), described fixed head (10) is provided with the L shaped flap (11) hinged with fixed head (10), described flap (11) two ends are respectively equipped with slide-bar (12), pull head (13), described slide-bar (12) is in sliding tray, described pull head (13) is lower in working order to be contacted with arm-tie (9).

5. a kind of workpiece clamp for machining according to claim 4, is characterized in that, described turning handle is provided with spacing head (14), and described turning handle and arm-tie (9) are rotationally connected.

6. according to claim 1 and 2 or 3 described a kind of workpiece clamp for machining, it is characterized in that, described slip grip block (4) is provided with resilient clamp plate (15) on the surface relative with benchmark seat board (2), described resilient clamp plate (15) is made by polyurethane material.

7. a kind of workpiece clamp for machining according to claim 4, it is characterized in that, described clamping screw (8) is provided with swing handle (16) away from an end of slip grip slipper (3), the holding section of described swing handle (16) is cylindrical, and parallel with clamping screw (8), the screw thread on clamping screw (8) is right-handed thread.

8. according to claim 1 and 2 or 3 described a kind of workpiece clamp for machining, it is characterized in that, described bolt (5) is the wing bolt with turn fin (17).

9. according to claim 1 and 2 or 3 described a kind of workpiece clamp for machining, is characterized in that, the lower end of described slip grip block (4) and pedestal (1) upper surface recline, and the surface configuration that described slip grip block (4) is relative with benchmark seat board (2) is corresponding.

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