CN204353840U - A kind of many row's liquid crystal display television side frame special fixtures - Google Patents

Abstract

A kind of many row's liquid crystal display television side frame special fixtures, comprise base plate, X to positioner, Y-direction positioner and Z-direction positioner; Described X to positioner connect and control its X to positioning datum plate to the frame workpiece on described base plate carry out transverse direction promote realize X to location; Described Y-direction positioner is arranged at the groove face of described clamping groove by described slotted eye and the frame workpiece respectively to both sides provides the location thrust perpendicular to fin spacing described in both sides to carry out Y-direction location to described frame workpiece; Described Z-direction positioner is installed on described clamping groove by described slotted eye is vertical, and provides the positioning pressure perpendicular to described base plate to carry out Z-direction location to described frame workpiece respectively to the frame workpiece on both sides; The surrounding of described base plate is also provided with protective cover, and the polycrystalline substance of described base plate is gone along with sb. to guard him in described protective cover.The utility model proposes a kind of many rows liquid crystal display television side frame special fixture of multi-direction vertical Set and Positioning mutually, guarantee and improve the machining accuracy of frame workpiece.

Description

A special fixture for multi-row LCD TV frame

technical field

The utility model relates to the field of mechanical processing fixtures, in particular to a special fixture for multi-row LCD TV frames.

Background technique

With the development of numerical control technology, many parts of products are processed by CNC machine tools. Generally, fixtures need to be installed on the machine tool to clamp the workpiece or guide the tool. Its function is to position the workpiece so that the workpiece can obtain relative The correct position, and reliable clamping of the workpiece. In the processing of LCD TV frame workpieces, the frame workpieces are generally clamped by double fixed clamping fixtures on the left and right sides of the cylinder. When the workpiece is processed, it only receives the radial clamping force in the Y direction, and the workpiece in the Z direction axis It is prone to movement and affects the accuracy of processing. In addition, because the clamping contact surface of the frame workpiece is small, if the radial clamping force is increased, the frame workpiece may suffer from pressure loss, which makes the processing of the frame workpiece not precise and the qualified rate of the finished product is not high.

Utility model content

The purpose of this utility model is to propose a multi-row liquid crystal TV frame special fixture for clamping and positioning perpendicular to each other in multiple directions, which is specially used for processing frame workpieces, so as to ensure and improve the processing accuracy of frame workpieces.

For this purpose, the utility model adopts the following technical solutions:

A special fixture for multi-row LCD TV frames, including a bottom plate, an X-direction positioning device, multiple Y-direction positioning devices, and multiple Z-direction positioning devices;

The X-direction positioning device is installed on the workbench of the machine tool through the mounting seat, and is arranged on any end in the lateral direction of the base plate. The X-direction positioning device is connected and controls the alignment of the X-direction positioning reference plate to the base plate. The upper frame workpiece is pushed laterally to realize X-direction positioning;

Two rows or more than two rows of segmented clamping grooves are horizontally arranged on the working table of the base plate, and the frame workpieces are respectively placed on both sides of the grooves in the transverse direction of the clamping grooves, and The direction of the X-direction positioning device protrudes from the bottom plate, and the bottom surface of the clamping groove is provided with a plurality of slots for installing the positioning device along the position of the transverse centerline in the groove;

The Y-direction positioning device is arranged on the groove surface of the clamping groove through the slot hole, and the Y-direction positioning device provides positioning thrusts perpendicular to the limiting ribs on both sides to the frame workpieces on both sides respectively. The frame workpiece is positioned in the Y direction;

The Z-direction positioning device is vertically installed in the clamping groove through the slot hole, and the Z-direction positioning device respectively provides positioning pressure perpendicular to the bottom plate to the frame workpiece on both sides to carry out Z-direction clamping on the frame workpiece. position;

A protective cover is also provided around the bottom plate, the bottom structure of the bottom plate is enclosed in the protective cover, the protective cover is provided with an air source connector, and the Z-direction clamping cylinder in the protective cover passes through the protective cover. The air source connector is connected with an external air source.

More preferably, the protective cover is provided with an air source connector, and the air pipe of the Z-direction clamping cylinder in the protective cover is connected to an external air source through the air source connector.

More preferably, the limiting ribs are symmetrically arranged on the left and right sides of the clamping groove along its transverse center line, and the two groove sides of the clamping groove respectively form a space for placing the frame workpiece with the limiting ribs. slot, the width of the slot is smaller than the total width of the frame workpiece, when the frame workpiece is placed in the slot, the inner frame strip of the frame workpiece is placed on the convex surface of the limiting rib .

More preferably, the X-direction positioning device includes an X-direction cylinder and an X-direction positioning reference plate, the X-direction cylinder is connected to the X-direction positioning reference plate through an X-direction connecting shaft, and the X-direction positioning reference plate is composed of the X-direction positioning reference plate The X-direction cylinder is controlled to push one end of the frame workpiece to perform X-direction positioning.

More preferably, the Y-direction positioning device includes a positioning sleeve, a Y-direction connecting shaft and a block, a spring is sleeved on the Y-direction connecting shaft, one end of the Y-direction connecting shaft is connected to the block, The other end is connected to the positioning bushing, the positioning bushing is positioned and installed along the transverse centerline of the clamping groove by bolts, and the Y-direction connecting axis is perpendicular to the transverse centerline in the groove of the clamping groove , when the frame workpiece is put into the slot, one side of the frame workpiece is against the clamp block, and the spring is compressed, and the interaction force of the compressed spring acts on the clamp On the block, make the clamping block clamp and position the frame workpiece in the Y direction.

More preferably, the Z-direction positioning device includes a Z-direction clamping cylinder, a Z-direction connecting shaft and a splint, and the Z-direction clamping cylinder is vertically installed on the bottom of the bottom plate and located on the groove surface of the clamping groove Below, one end of the Z-direction connecting shaft is connected to the Z-direction clamping cylinder, the other end passes through the groove surface and connects to the middle part of the splint, and the plate surface of the splint is parallel to the bottom plate, so The up and down movement of the splint is controlled by the Z-direction clamping cylinder, and the frame workpiece located under the left and right sides of the splint is pressed into the slot to perform Z-direction positioning.

More preferably, the Z-direction positioning device further includes a shaft seal, and the shaft seal is arranged in the slot for installing the Z-direction connecting shaft.

More preferably, the Z-direction clamping cylinder is a biaxial clamping cylinder.

More preferably, the bottom of the bottom plate is provided with bottom plate reinforcement ribs, and the bottom plate reinforcement ribs are arranged along the transverse direction of the bottom plate.

More preferably, there are two types of splints, one type of splint has a width greater than the width between the two limiting ribs in the clamping groove, and the other type of splint has a lower pressing surface There are levels, and the stepped surfaces of the levels are correspondingly pressed against the inner stepped surfaces of the frame workpiece.

Beneficial effects of the utility model: 1. The fixture is provided with clamping and positioning devices perpendicular to each other in three directions of X, Y and Z, so that the frame workpiece can be clamped and stabilized during processing; 2. Protruding clamps are provided at intervals 3. The matching design of the limit rib and the clamping groove makes the fixture specially used for the clamping of the frame workpiece, which conforms to the structural design of the frame workpiece ; 4. The design of the positioning device in all directions is more reasonable, the structure is simple, and the service life of the fixture is long.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is the bottom structural representation of an embodiment of the utility model;

Fig. 3 is a schematic structural view of a Y-direction positioning device according to an embodiment of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of a clamping groove according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of an enlarged structure of a Y-direction positioning device according to an embodiment of the present invention;

Fig. 6 is an enlarged schematic diagram of a cross-sectional structure of an embodiment of the present invention in use.

Among them: base plate 1, X-direction positioning device 2, Y-direction positioning device 3, Z-direction positioning device 4, frame workpiece 10, clamping groove 11, limiting rib 12, slot 13, slot hole 14, mounting base 15, Protective cover 16, air source connector 17, bottom plate reinforcement rib 18, chip cleaning platform 19, mounting seat 5, X-direction cylinder 21, X-direction connecting shaft 22, X-direction positioning reference plate 23, positioning bushing 31, spring 32, Y To the connecting shaft 33, the block 34, the Z-direction clamping cylinder 41, the Z-direction connecting shaft 42, the splint 43, the shaft seal 44, the level 431, the first step surface 101, the second step surface 102, the side groove surface 111, the outer Flat surface 341 , transverse protrusion 342 , upper end surface 343 .

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

A special fixture for multi-row LCD TV frames, including a bottom plate 1, an X-direction positioning device 2, a plurality of Y-direction positioning devices 3 and a plurality of Z-direction positioning devices 4;

The X-direction positioning device 2 is installed on the workbench of the machine tool through the mounting base 5, and is arranged on any end of the lateral direction of the base plate 1, and the X-direction positioning device 2 is connected to and controls its X-direction positioning reference plate 23. Transversely push the frame workpiece 10 on the base plate 1 to realize X-direction positioning;

Two or more rows of segmented clamping grooves 11 are horizontally arranged on the working table of the base plate 1, and the frame workpieces 10 are respectively placed in the two grooves in the transverse direction of the clamping grooves 11. side, and protrude from the bottom plate 1 in the direction of the X-direction positioning device 2, the bottom surface of the clamping groove 11 is provided with a plurality of slots 14 for installing the positioning device along the position of the transverse centerline in the groove ;

The Y-direction positioning device 3 is arranged on the groove surface of the clamping groove 11 through the slot hole 14, and the Y-direction positioning device 3 respectively provides the frame workpiece 10 on both sides with the limiting ribs 12 perpendicular to the two sides. The positioning thrust of the frame workpiece 10 is positioned in the Y direction;

The Z-direction positioning device 4 is vertically installed in the clamping groove 11 through the slot hole 14, and the Z-direction positioning device 4 respectively provides the positioning pressure perpendicular to the bottom plate 1 to the frame workpiece 10 on both sides. The frame workpiece 10 is positioned in the Z direction;

A protective cover 16 is also provided around the base plate 1, the bottom structure of the base plate 1 is enclosed in the protective cover 16, and the protective cover 16 is provided with an air source connector 17, Z in the protective cover 16 The clamping cylinder 41 is connected to an external air source through the air source connector 17 .

As shown in Figure 1, the Y-direction positioning thrust is provided by the Y-direction positioning device 3, so that the side of the frame workpiece 10 is close to the groove edge of the clamping groove 11, and then the X-direction positioning device 2 aligns the frame workpiece 10 Carry out X-direction movement, so that the processing station of the frame workpiece 10 is aligned with the processing tool, and the processing station is controllable and adjustable. The Z-direction positioning device 4 provides the frame workpiece 10 with a The positioning pressure makes the frame workpiece 10 be pressed against the groove surface of the clamping groove 11 by downward pressure, which can prevent the frame workpiece 10 from moving in the axial direction during processing. When the tool is processing the frame workpiece 10, the frame workpiece 10 will not move under the pressure of the Y-direction positioning device 3 and the Z-direction positioning device 4, and the multi-station positioning of the frame workpiece 10 will make the clamping tighter. Solid, improve the machining accuracy of the workpiece.

The waste chips produced by processing will generally fall into the workpiece and the clamping groove, and a plurality of raised clamping grooves 11 are arranged at intervals, so that the waste chips can be quickly blown down to the clear surface of the bottom surface of the groove whose water level is lower than the clamping groove 11. On the chips platform 19, the accuracy of workpiece clamping in the clamping groove 11 is not affected, and the waste chips produced are also easy to clean up, prolonging the life of the fixture.

One end of the air source joint 17 is connected to the corresponding Z-direction clamping cylinder 41, and the other end is connected to the air source. The base plate 1 is protected by a protective cover 16 around it, so that the structure such as the cylinder mounting base under the base plate 1 can be hidden inside to prevent processing. Aluminum chips and coolant fly into the bottom of the fixture, making the fixture more beautiful and tidy as a whole.

More preferably, the protective cover 16 is provided with an air source connector 17 , and the air pipe of the Z-direction clamping cylinder 41 inside the protective cover 16 is connected to an external air source through the air source connector 17 . One end of the air source connector 17 is connected to the corresponding Z-direction clamping cylinder 41, and the other end is connected to the air source; by connecting the corresponding air source connector 17, the Z-direction clamping cylinder 41 is controlled separately to achieve controlled clamping of frame workpieces with different lengths 10.

More preferably, the clamping groove 11 is symmetrically provided with limiting ribs 12 along the left and right sides of its transverse midline, and the two sides of the clamping groove 11 are respectively formed with the limiting ribs 12 for Place the slot 13 of the frame workpiece 10, the width of the slot 13 is less than the total width of the frame workpiece 10, when the frame workpiece 10 is put into the slot 13, the inner frame bar of the frame workpiece 10 will Put it on the convex surface of the limiting rib 12.

As shown in Figure 4 or Figure 5 or Figure 6, the two groove sides of the clamping groove 11 form two slots 13 for placing the frame workpiece 10 with the limiting rib 12 respectively, and the width of the slot 13 is smaller than that of the frame workpiece 10, when the frame workpiece 10 is put into the slot 13, the inner frame bar of the frame workpiece 10 is placed on the convex surface of the limiting rib 12, and a limiting convex that is offset against the vacant structure on the frame workpiece 10 is provided. The edge 12 enables the frame workpiece 10 to be horizontally placed in the slot 13 more stably, so that the downward positioning of the frame workpiece 10 by the Z-direction positioning device 4 is more stable and fastened.

More preferably, the X-direction positioning device 2 includes an X-direction cylinder 21 and an X-direction positioning reference plate 23, the X-direction cylinder 21 is connected to the X-direction positioning reference plate 23 through an X-direction connecting shaft 22, and the X-direction The positioning reference plate 23 is controlled by the X-direction cylinder 21 to push one end of the frame workpiece 10 to perform X-direction positioning.

More preferably, the Y-direction automatic positioning device 3 includes a positioning shaft sleeve 31, a Y-direction connecting shaft 33 and a block 34, the Y-direction connecting shaft 33 is sleeved with a spring 32, and the Y-direction connecting shaft 33 One end is connected to the block 34, and the other end is connected to the positioning bushing 31. The positioning bushing 31 is positioned and installed along the transverse centerline of the clamping groove 11 by bolts. The Y-direction connecting shaft 33 When the frame workpiece 10 is put into the slot 13 perpendicular to the transverse midline of the clamping groove 11, one side of the frame workpiece 10 abuts against the clamping block 34, and the The spring 32 is compressed, and the interaction force of the compressed spring 32 acts on the clamping block 34 , so that the clamping block 34 clamps and positions the frame workpiece 10 in the Y direction.

As shown in Figure 4 or Figure 5, the Y-direction positioning device 3 adopts the structure of the positioning bushing 31, the spring 32, the Y-direction connecting shaft 33 and the clamping block 34 to automatically position the frame workpiece 10 placed in the Y direction, and manually position the frame The workpiece 10 is set along the slope of the block 34 and pressed into the slot 13, and the inner side of the frame workpiece 10 compresses the spring 32, so that the spring 32 generates a relative force to make the frame workpiece 10 close to the groove of the clamping groove 11 The side is automatically positioned by the clamping block 34 and the spring 32, and the structure is simple, and there is no need to provide a cylinder for pressing and driving.

More preferably, the clamping block 34 is provided with an outer plane 341 parallel to the side groove surface 111 of the clamping groove 11, and the distance between the outer plane 341 and the side groove surface 111 is smaller than that of the frame workpiece 10 Width, when the frame workpiece 10 is placed along any side of the clamping groove 11, the other side of the frame workpiece 10 is against the outer plane 341 of the block 43, and the spring 32 is compressed state, the spring 32 in a compressed state produces a spring action on the clamping block 34, so that the clamping block 34 clamps and positions the frame workpiece 10 in the Y direction. The outer plane 341 is provided with a transverse protrusion 342 for clamping the frame workpiece 10 , when the frame workpiece 10 is placed along any side of the clamping groove 11 , the other side of the frame workpiece 10 The side abuts against the outer plane 341 of the locking block 43 and abuts against the lower side of the transverse protrusion 342 .

The horizontal projection 342 for clamping the frame workpiece 10 is set, so that the frame workpiece 10 can be firmly clamped on the block 34, so that the positioning of the frame workpiece 10 in the Y direction is more stable. When the workpiece is processed, the horizontal projection 342 It also plays a certain role in clamping the frame workpiece in the axial direction.

More preferably, the upper end surface 343 of the locking block 34 is set as an inclined surface, and the upper end surface 343 is inclined toward the transverse protrusion 342 . An upper end surface 343 inclined to the protrusion 342 is provided to make it easier to press the frame workpiece 10 into the slot along the inclined surface, reduce the time required for pressing the workpiece, reduce the labor intensity of workers, and improve the processing efficiency.

The Z-direction positioning device 4 includes a Z-direction clamping cylinder 41, a Z-direction connecting shaft 42 and a clamping plate 43, and the Z-direction clamping cylinder 41 is vertically installed on the bottom of the bottom plate 1 and located in the clamping groove 11 Below the groove surface, one end of the Z-direction connecting shaft 42 is connected to the Z-direction clamping cylinder 41, the other end passes through the groove surface and connects the middle part of the clamping plate 43, the plate surface of the clamping plate 43 Parallel to the bottom plate 1, the clamping plate 43 is controlled by the Z-direction clamping cylinder 41 to move up and down, and press the frame workpiece 10 under the left and right sides of the clamping plate 43 into the slot 13 to carry out Z clamping. orientation.

The Z-direction positioning device 4 installed vertically, its Z-direction clamping cylinder 41 is installed on the bottom of the bottom plate 1 and below the groove surface of the clamping groove 11. area, improve the overall aesthetics, and the downward movement of the splint 43 is controlled by the cylinder to provide downward positioning pressure for the frame workpiece 10 .

More preferably, the Z-direction positioning device 4 further includes a shaft seal 44 disposed in the slot 14 for installing the Z-direction connecting shaft 42 . A shaft seal 44 is installed on the bottom plate 1 to prevent aluminum chips or cutting fluid produced during processing from falling into the cylinder body through the movement gap of the Z-direction connecting shaft 42, thereby avoiding damage to the cylinder and improving the life of the machine.

More preferably, the Z-direction clamping cylinder 41 is a biaxial clamping cylinder. The rigidity of the double-axis clamping cylinder is larger than that of the general cylinder, and the shaft head of the double-axis cylinder will not rotate, and the pressing force is large, which can more effectively meet the requirements of mechanical finishing.

Described base plate 1 bottom is provided with mounting base 15, and described base plate 1 is installed on the workbench of machine tool by described mounting base 15. The fixture is installed on different machine tools through the installation base 15, so that the scope of application of the fixture is wider.

More preferably, the bottom of the bottom plate 1 is provided with bottom plate reinforcing ribs 18 , and the bottom plate reinforcing ribs 18 are arranged along the transverse direction of the bottom plate 1 . When reducing the weight of the base plate 2, base plate reinforcing ribs 18 can be set at the bottom of the base plate 1, without affecting the rigidity of the base plate. As shown in Figure 2, three transverse base plate reinforcing ribs 6 are respectively installed on the bottom surface of the base plate 1 to strengthen the base plate. 1 rigidity.

More preferably, the clamping plate 43 is provided with two types, one type of the clamping plate 43 has a width greater than the width between the two limiting ribs 12 in the clamping groove 11, and the other type of the clamping plate 43 The lower pressing surface of the frame is provided with a level 431 , and the step surface of the level 431 is correspondingly pressed against the inner step surface of the frame workpiece 10 .

When clamping frame workpieces of different lengths, the splint 43 of the Z-direction positioning device 4 that does not need to be used is replaced with a splint 43 whose width is smaller than the width of the two limiting ribs 12 in the clamping groove 11 to avoid the space, so that The fixture is suitable for frame workpieces of different lengths, and does not limit the length of workpieces that can be processed. Another type of splint 43 with a level 431, the step surface of the level 431 is correspondingly pressed against the inner step surface of the frame workpiece 10, matching the setting of the frame workpiece 10, so that the positioning of the frame workpiece 10 in the Z direction is firmer.

More preferably, the splint 43 with the level 431 is provided with two widths, the first width presses down on the first step surface 101 of the frame workpiece 10, and the second width only presses down on the frame workpiece 1's second-order surface 102 .

As shown in Fig. 4 and Fig. 6, there are two kinds of widths. The first step surface 101 of the frame workpiece needs to be milled and drilled at both ends of the workpiece. Therefore, there is a first step that only presses down on the frame workpiece 1 The second-stage surface 102 can avoid the processing position that needs to be processed on the first-stage surface 101, without affecting the processing of the frame workpiece 10, without repositioning and clamping, and the processing of the frame workpiece can be completed in one clamping.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present utility model, and can not be interpreted as the restriction to the protection scope of the present utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (10)

1. A multi-row LCD TV frame special fixture is characterized in that: it comprises a base plate, an X-direction positioning device, a plurality of Y-direction positioning devices and a plurality of Z-direction positioning devices; The X-direction positioning device is installed on the workbench of the machine tool through the mounting seat, and is arranged on any end in the lateral direction of the base plate. The X-direction positioning device is connected and controls the alignment of the X-direction positioning reference plate to the base plate. The upper frame workpiece is pushed laterally to realize X-direction positioning; Two or more rows of segmented clamping grooves are horizontally arranged on the working table of the bottom plate, and the frame workpieces are respectively placed on both sides of the grooves in the transverse direction of the clamping grooves, and The direction of the X-direction positioning device protrudes from the bottom plate, and the bottom surface of the clamping groove is provided with a plurality of slots for installing the positioning device along the position of the transverse centerline in the groove; The Y-direction positioning device is arranged on the groove surface of the clamping groove through the slot hole, and the Y-direction positioning device provides positioning thrusts perpendicular to the limiting ribs on both sides to the frame workpieces on both sides respectively. The frame workpiece is positioned in the Y direction; The Z-direction positioning device is vertically installed in the clamping groove through the slot hole, and the Z-direction positioning device respectively provides positioning pressure perpendicular to the bottom plate to the frame workpiece on both sides to carry out Z-direction clamping on the frame workpiece. position; A protective cover is also provided around the bottom plate, the bottom structure of the bottom plate is enclosed in the protective cover, the protective cover is provided with an air source connector, and the Z-direction clamping cylinder in the protective cover passes through the protective cover. The air source connector is connected with an external air source. 2. The special clamp for multi-row LCD TV frame according to claim 1, characterized in that: the protective cover is provided with an air source connector, and the air pipe of the Z-direction clamping cylinder in the protective cover passes through the air source connector Connect to an external air source. 3. The special fixture for multi-row LCD TV frames according to claim 1, characterized in that: the left and right sides of the clamping groove along its transverse center line are respectively symmetrically provided with limiting ribs, and the two sides of the clamping groove The groove sides and the limiting ribs respectively form slots for placing frame workpieces. The width of the slots is smaller than the total width of the frame workpieces. When the frame workpieces are placed in the slots, the frame The inner frame strip of the workpiece is placed on the convex surface of the limiting rib. 4. The special fixture for multi-row LCD TV frames according to claim 1, wherein the X-direction positioning device includes an X-direction cylinder and an X-direction positioning reference plate, and the X-direction cylinder is connected to the X-direction through the X-direction shaft. The X-direction positioning reference plate, the X-direction positioning reference plate is controlled by the X-direction cylinder to push one end of the frame workpiece to perform X-direction positioning. 5. The special fixture for multi-row LCD TV frame according to claim 1, characterized in that: the Y-direction positioning device includes a positioning shaft sleeve, a Y-direction connecting shaft and a block, and the Y-direction connecting shaft is sleeved with a A spring, one end of the Y-direction connecting shaft is connected to the clamping block, and the other end is connected to the positioning bushing, and the positioning bushing is positioned and installed along the transverse centerline of the clamping groove by bolts. The Y-direction connecting axis is perpendicular to the transverse midline in the groove of the clamping groove. When the frame workpiece is put into the slot, one side of the frame workpiece is against the clamping block, and the spring Compression occurs, and the interaction force after the compression of the spring acts on the clamping block, so that the clamping block clamps and positions the frame workpiece in the Y direction. 6. The special fixture for multi-row LCD TV frames according to claim 1, characterized in that: the Z-direction positioning device includes a Z-direction clamping cylinder, a Z-direction connecting shaft and a splint, and the Z-direction clamping cylinder is vertical Installed on the bottom of the bottom plate and below the groove surface of the clamping groove, one end of the Z-direction connecting shaft is connected to the Z-direction clamping cylinder, and the other end passes through the groove surface and connects to the The middle part of the splint, the surface of the splint is parallel to the bottom plate, the splint is controlled by the Z-direction clamping cylinder to move up and down, and the frame workpiece located under the left and right sides of the splint is pressed against the groove position to perform Z-direction positioning. 7. The special clamp for multi-row LCD TV frame according to claim 6, characterized in that: the Z-direction positioning device also includes a shaft seal, and the shaft seal is arranged on the said Z-direction connecting shaft. Slot. 8. The special fixture for multi-row LCD TV frame according to claim 6 or 7, characterized in that: the Z-direction clamping cylinder is a biaxial clamping cylinder. 9. The special fixture for multi-row LCD TV frame according to claim 1, characterized in that: the bottom of the bottom plate is provided with a bottom plate reinforcing rib, and the bottom plate reinforcing rib is arranged along the transverse direction of the bottom plate. 10. The special fixture for multi-row LCD TV frame according to claim 6, characterized in that: there are two kinds of said splints, the width of one kind of said splint is larger than the two limiting ribs in said clamping groove The width between them, another type of clamping plate is provided with levels on the pressing surface, and the step surfaces of the levels are correspondingly covered and pressed against the inner step surface of the frame workpiece.