Multi-workpiece tool clamp and using method for universal machine tool

Abstract

The invention discloses a multi-workpiece tool clamp and a using method for a universal machine tool, and relates to the technical field of machine tool clamps. The clamping device comprises a mounting table, a fixed clamping assembly and a movable clamping assembly. The rotating screw rod rotates, the rotating screw rod drives the moving sleeve to move, and the moving sleeve drives the moving rotating block to move; the movable rotating block moves to drive the movable mounting block to move, and the distance between the fixed mounting block and the mounting block at one end is adjusted; the connecting sleeve at the top end of the connecting screw rod moves, and the connecting sleeve drives the connecting rotating block to move; the connecting rotating blocks move to drive the adjacent movable mounting blocks to move, and the distance between the movable mounting blocks is adjusted; the spacing can be adjusted when the multi-station clamp clamps workpieces of different sizes, and the situation that the workpieces are large in size and make contact with one another, and machining of the workpieces is affected is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of machine tool fixtures, and in particular, relates to a multi-workpiece fixture and a method of using the fixture for a general machine tool. Background Art

[0002] In the field of modern industrial production and mechanical processing, machine tool fixtures are an important part of the mechanical processing process system. Machine tool fixtures are a device used to clamp workpieces and guide tools on machine tools. It refers to a fixture specially designed for a certain process of a certain workpiece. It is characterized by compact structure, quick, convenient, labor-saving operation, flexibility and versatility. It has the functions of ensuring processing accuracy, stabilizing product quality, improving labor productivity, expanding the scope of machine tool technology, realizing the function of "one machine with multiple functions", reducing the technical requirements for workers, reducing the labor intensity of workers, reducing production costs, and balancing the production rhythm in automated production and assembly line production. It can ensure high processing accuracy and production efficiency, but the design and manufacturing cycle is long and the manufacturing cost is also high. When the product changes, the fixture will be scrapped because it can no longer be used. It is only suitable for production with fixed products and large batches. It contacts the positioning reference of the workpiece and is used to determine the correct position of the workpiece in the fixture, thereby ensuring the correct relative position of the workpiece relative to the tool and the machine tool during processing; however, most machine tool fixtures can only fix a single workpiece, and all use the entirety as a processing module. If a part of a different specification is to be processed, the entire fixture needs to be replaced, and due to the heavy weight of the fixture, it will be difficult to replace, and the processing speed of the parts will be reduced; Chinese patent application CN106002385A discloses an adjustable multi-station fixture and its working method. The technical solution is: it is composed of a base plate, a fixture plate assembly and a plurality of fastening screws, the base plate is provided with two base plate slides, the base plate slides are provided with a plurality of base plate positioning holes, the fixture plate assembly is composed of a multi-station fixture plate and two fixture adjustment plates, the fixture adjustment plate is provided with a fixture adjustment plate slide and two fixture adjustment plate sliders, the multi-station fixture plate is provided with a plurality of low-position fixture fixtures, a plurality of high-position fixture fixtures and a plurality of fixture plate fixing holes, the fixture adjustment plate slide is provided with a plurality of fixture adjustment plate positioning holes, and the fixture adjustment plate slider is provided with a plurality of fixture plate fixing holes; when operating, only the main fixture plate needs to be replaced, and the two fixture adjustment plates can adjust the distance between them according to the length of the multi-station fixture plate, and the fixture plate can be replaced without disassembling the entire fixture, which reduces the replacement weight and improves the processing speed; Chinese patent application CN205834793U discloses an adjustable multi-station fixture. The technical solution is as follows: it is composed of a base plate, a fixture plate assembly and a plurality of fastening screws. The base plate is provided with two base plate slides, and the base plate slides are provided with a plurality of base plate positioning holes. The fixture plate assembly is composed of a multi-station fixture plate and two fixture adjustment plates. The fixture adjustment plate is provided with a fixture adjustment plate slide and two fixture adjustment plate sliders. The multi-station fixture plate is provided with a plurality of low-position fixture fixtures, a plurality of high-position fixture fixtures and a plurality of fixture plate fixing holes. The fixture adjustment plate slide is provided with a plurality of fixture adjustment plate positioning holes, and the fixture adjustment plate slider is provided with a plurality of fixture plate fixing holes. When operating, only the main fixture plate needs to be replaced, and the distance between the two fixture adjustment plates can be adjusted according to the length of the multi-station fixture plate. The fixture plate can be replaced without disassembling the entire fixture, which reduces the replacement weight and improves the operation efficiency. The above patents and prior art also have the following defects: Existing multi-workpiece fixtures usually have fixed positions and fixed spacings. When faced with workpieces of different sizes, larger workpieces will contact and collide with each other, and the fixtures need to be disassembled and the spacing needs to be readjusted and fixed before they can continue to be fixed, which is time-consuming and labor-intensive, and the operation process is cumbersome. When faced with larger workpieces, multi-workpiece fixtures cannot be fixed, and the fixing parts need to be replaced. Replacing parts requires disassembly and installation, which is time-consuming and labor-intensive, and is not conducive to the use of the device in actual production.

[0003] In response to the problems in the related technology, the present invention proposes a multi-workpiece fixture and a method of using it for a general machine tool, which has the function of enabling the multi-station fixture to adjust the spacing when clamping workpieces of different sizes, so as to prevent large workpieces from contacting each other and affecting the processing of the workpieces; larger workpieces can be clamped separately, avoiding the need to replace different fixtures, reducing the process of disassembly and installation, saving time and effort, etc., and solves the problem that when facing workpieces of different sizes, the large workpieces will contact and collide with each other, and the fixture needs to be disassembled and the spacing needs to be adjusted and fixed before they can continue to be fixed, which is time-consuming and labor-intensive, and the operation process is cumbersome; when facing larger workpieces, the multi-workpiece fixture cannot be fixed, and the fixing parts need to be replaced. The replacement of parts requires disassembly and installation, which is time-consuming and labor-intensive, and is not conducive to the use of the device in actual production. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention is a multi-workpiece fixture, comprising a mounting table, a fixed clamping assembly and a movable clamping assembly, wherein the fixed clamping assembly is arranged on the top surface of the mounting table, and a plurality of movable clamping assemblies are arranged on both sides of the fixed clamping assembly; The fixed clamping assembly comprises a fixed mounting block, a rotating screw, a movable sleeve and a movable rotating block, wherein the fixed mounting block is fixedly mounted on the top surface of the mounting platform, a rotating mounting opening is provided on the side of the fixed mounting block, two rotating screws are rotatably mounted on the rotating mounting opening, the rotating screw is threadedly sleeved with the movable sleeve, and the movable rotating block is fixedly mounted on one end of the movable sleeve; When the rotating screw is rotated, the movable sleeve can be moved, and the movable sleeve can drive the movable rotating block to move; The movable clamping assembly includes a movable mounting block, a connecting screw, a connecting sleeve and a connecting rotating block. The movable mounting block is arranged on the top surface of the mounting platform. A rotating connecting groove is provided on one side of the movable mounting block, and a connecting mounting groove is provided on the other side. The connecting screw is rotatably installed in the connecting mounting groove. The connecting sleeve is threadedly sleeved on the connecting screw, and the connecting rotating block is fixedly installed on one side of the connecting sleeve.

[0005] Preferably, the movable clamping assembly further comprises a movable limit block, a limit wedge block, a rotation limit block, a limit threaded rod and a wedge block movable rod, the rotation mounting opening is provided with a wedge block mounting groove, the movable limit block is slidably mounted in the wedge block mounting groove, the limit wedge block is arranged below the movable limit block, the limit wedge block is slidably mounted in the wedge block mounting groove, the rotation limit block is slidably mounted in the rotation mounting opening, a threaded mounting opening is provided at one end of the movable mounting block, the limit threaded rod passes through the threaded mounting opening and is rotatably connected to the rotation limit block, and is connected to the threaded mounting opening The threaded mounting port is threadedly matched, and a movable mounting groove is opened at one end of the movable mounting block, and the movable mounting groove is communicated with the wedge block mounting groove, and the wedge block movable rod passes through the movable mounting groove and is fixedly connected with the limiting wedge block; when the movable rotating block moves into the rotating connection groove, the movable mounting block can be fixedly connected with the fixed mounting block, and when the connecting screw rod rotates, the connecting sleeve can move, and the connecting sleeve can drive the connecting rotating block to move, and the connecting rotating block can be connected with other movable rotating blocks, so that multiple movable rotating blocks can be connected in sequence.

[0006] Preferably, the movable clamping assembly also includes a connecting gear, a plurality of transmission gears and a gear rotating rod. A transmission mounting groove is opened at one end of the movable mounting block, and the transmission mounting groove is connected to the connecting mounting groove. The connecting gear is rotatably mounted in the connecting mounting groove, the connecting screw is fixedly connected to the connecting gear, the transmission gear is rotatably mounted in the transmission mounting groove, and the transmission gear is meshed with the adjacent transmission gear, and the transmission gear closest to the connecting gear is meshed with the connecting gear. The movable mounting block is movably and fixedly mounted with a rotating rod mounting block, and the gear rotating rod passes through the rotating rod mounting block and is fixedly connected to the outermost transmission gear, and the connecting sleeve is slidably mounted in the connecting mounting groove.

[0007] Preferably, the mobile clamping assembly also includes a mobile clamping plate and a mobile clamping screw, the mobile clamping plate is slidably mounted on the top surface of the mobile mounting block, a screw mounting block is fixedly mounted on the top surface of the mobile mounting block, the mobile clamping screw passes through the screw mounting block and is rotatably connected to the mobile clamping plate, and the mobile clamping screw is threadedly rotatably connected to the screw mounting block.

[0008] Preferably, the fixed clamping assembly also includes a driving gear, a plurality of rotating gears, a driving gear and an active rotating rod, two of the driving gears are rotatably installed in the rotating mounting mouth, and the driving gears are respectively fixedly connected to the rotating screw rod, a driving mounting groove is opened at one end of the fixed mounting block, the driving mounting groove is communicated with the rotating mounting mouth, a plurality of rotating gears are rotatably installed on both sides of the inner wall of the driving mounting groove, the rotating gears are meshed with adjacent rotating gears, and the rotating gear closest to the driving gear is meshed with the driving gear, a gear mounting plate is fixedly installed at one end of the fixed mounting block, the driving gear is rotatably installed on one side of the gear mounting plate, and the driving gear is meshed with the outermost driving gear, the active rotating rod is arranged on the other side of the gear mounting plate, and the active rotating rod passes through the gear mounting plate and is fixedly connected to the driving gear, and the movable sleeve is slidably installed in the rotating mounting mouth.

[0009] Preferably, the fixed clamping assembly also includes a fixed clamping plate and a fixed clamping screw, the fixed clamping plate is slidably mounted on the top surface of the fixed mounting block, a screw mounting plate is fixedly mounted on the top surface of the fixed mounting block, the fixed clamping screw passes through the screw mounting plate and is rotatably connected to the fixed clamping plate, and the fixed clamping screw is threadedly rotatably connected to the screw mounting plate.

[0010] Preferably, the movable clamping assembly also includes a limit plate, a limit mounting block, a return spring, a limit rod and a toggle rod, one end of the movable mounting block is provided with two limit holes, the limit hole is arranged above the wedge block mounting slot, one end of the wedge block moving rod is fixedly installed with the limit plate, and one side of the limit plate is fixedly installed with the limit mounting block, one end of the limit mounting block is provided with a sliding limit groove, the limit rod is slidably installed in the sliding limit groove, the return spring is arranged in the sliding limit groove, one end of the return spring is fixedly connected to the limit rod, and the other end is fixedly connected to the inner wall of the sliding limit groove, the top surface of the limit mounting block is provided with a moving groove, and the toggle rod passes through the moving groove and is fixedly connected to the limit rod.

[0011] Preferably, one end of the movable rotating block and the connecting rotating block is cylindrical, and one end of the movable limiting block is a concave arc surface.

[0012] Preferably, the outer contour of the limiting rod is the same as the inner contour of the limiting hole.

[0013] A method for using a multi-workpiece fixture for a general machine tool, using the multi-workpiece fixture, comprises the following steps: When clamping multiple workpieces; The rotating screw rotates, the rotating screw drives the movable sleeve to move, and the movable sleeve drives the movable rotating block to move; The movement of the movable rotating block drives the movable installation block to move, thereby adjusting the distance between the fixed installation block and the movable installation block; The connecting screw is rotated, the connecting sleeve at the top of the connecting screw moves, and the connecting sleeve drives the connecting rotating block to move; The movement of the connecting rotating block drives the adjacent movable installation blocks to move, thereby adjusting the distance between the movable installation blocks; When clamping an enlarged workpiece, the outermost movable mounting blocks on both sides of the fixed mounting block rotate so that the two are respectively in contact with the two sides of the workpiece, and the rotating screw rotates to reduce the distance between the fixed mounting block and the movable mounting block, so that the movable mounting block in contact with the workpiece squeezes and clamps the workpiece.

[0014] The technical effect achieved by the present invention is that, compared with the prior art, the present invention provides a multi-workpiece fixture and a method for using the fixture for a general machine tool, which has the following beneficial effects: When clamping multiple workpieces; the rotating screw rotates, the rotating screw drives the moving sleeve to move, and the moving sleeve drives the moving rotating block to move; the moving rotating block moves and drives the moving mounting block to move, and adjusts the distance between the fixed mounting block and the mounting block at one end; the connecting screw rotates, the connecting sleeve at the top of the connecting screw moves, and the connecting sleeve drives the connecting rotating block to move; the connecting rotating block moves and drives the adjacent moving mounting blocks to move, and adjusts the distance between the moving mounting blocks; the multi-station clamp can adjust the spacing when clamping workpieces of different sizes to prevent workpieces of larger sizes from affecting each other and contacting each other, thereby affecting the processing of the workpieces.

[0015] When clamping an enlarged workpiece, the outermost movable mounting blocks on both sides of the fixed mounting block rotate so that the two are in contact with the two sides of the workpiece respectively, and the screw rod rotates to reduce the distance between the fixed mounting block and the movable mounting block, and the movable mounting block in contact with the workpiece squeezes and clamps the workpiece; larger workpieces can be clamped separately, avoiding the need to replace different fixtures, reducing the steps of replacing parts, and facilitating the use of the device in production.

[0016] When the number of workpieces to be processed increases, a new mobile fixed block is set on the side of the outermost mobile fixed block to increase the number of workpieces that can be clamped by the fixture at the same time; when the number of workpieces to be processed decreases, the mobile fixed block located on the outermost side is removed to reduce the clamping stations of the clamping fixture and prevent the parts that are not fixed from affecting the processing; a separate mobile mounting block can be removed and installed without the need to disassemble other mobile mounting blocks for assembly, which is convenient for operators to disassemble and install daily, saving time and having a high degree of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is one of the overall three-dimensional structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 It is one of the partial three-dimensional structural schematic diagrams of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure at A; Figure 5 This is the second schematic diagram of the partial three-dimensional structure of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at B; Figure 7 This is the third schematic diagram of the partial three-dimensional structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the structure at C; Fig. 9 This is the fourth schematic diagram of the partial three-dimensional structure of the present invention; Fig.10 For the present invention Fig. 9 Schematic diagram of the structure at D.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Mounting table; 2. Fixed clamping assembly; 201. Fixed mounting block; 202. Rotating screw rod; 203. Moving sleeve; 204. Moving rotating block; 205. Driving gear; 206. Rotating gear; 207. Active gear; 208. Active rotating rod; 209. Fixed clamping plate; 210. Fixed clamping screw rod; 3. Moving clamping assembly; 301. Moving mounting block; 302. Connecting screw rod; 303. Connecting sleeve; 3 04, connecting rotating block; 305, moving limit block; 306, limit wedge block; 307, rotating limit block; 308, limit threaded rod; 309, wedge block moving rod; 310, connecting gear; 311, transmission gear; 312, gear rotating rod; 313, moving clamping plate; 314, moving clamping screw rod; 315, limit plate; 316, limit mounting block; 317, reset spring; 318, limit rod; 319, toggle rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0021] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0022] For example, see Figure 1 - Fig.10As shown, the present invention is a multi-workpiece fixture, comprising a mounting platform 1, a fixed clamping assembly 2 and a movable clamping assembly 3, wherein the fixed clamping assembly 2 is arranged on the top surface of the mounting platform 1, and a plurality of movable clamping assemblies 3 are arranged on both sides of the fixed clamping assembly 2; The fixed clamping assembly 2 includes a fixed mounting block 201, a rotating screw 202, a movable sleeve 203 and a movable rotating block 204. The fixed mounting block 201 is fixedly mounted on the top surface of the mounting platform 1. A rotating mounting opening is provided on the side of the fixed mounting block 201. Two rotating screws 202 are rotatably mounted on the rotating mounting opening. The rotating screw 202 is threadedly sleeved with a movable sleeve 203. The movable rotating block 204 is fixedly mounted on one end of the movable sleeve 203. When the rotating screw rod 202 rotates, the movable sleeve 203 can move, and the movable sleeve 203 can drive the movable rotating block 204 to move; The mobile clamping assembly 3 includes a mobile mounting block 301, a connecting screw rod 302, a connecting sleeve 303 and a connecting rotating block 304. The mobile mounting block 301 is arranged on the top surface of the mounting platform 1. A rotating connecting groove is provided on one side of the mobile mounting block 301, and a connecting mounting groove is provided on the other side. The connecting screw rod 302 is rotatably installed in the connecting mounting groove. The connecting sleeve 303 is threadedly sleeved on the connecting screw rod 302. The connecting rotating block 304 is fixedly installed on one side of the connecting sleeve 303. When in use, when clamping multiple workpieces; the rotating screw 202 rotates, the rotating screw 202 drives the moving sleeve 203 to move, and the moving sleeve 203 drives the moving rotating block 204 to move; the moving rotating block 204 moves and drives the moving mounting block 301 to move, so as to adjust the distance between the fixed mounting block 201 and the mounting block at one end; the connecting screw 302 rotates, the connecting sleeve 303 at the top of the connecting screw 302 moves, and the connecting sleeve 303 drives the connecting rotating block 304 to move; the connecting rotating block 304 moves and drives the adjacent moving mounting blocks 301 to move, so as to adjust the distance between the moving mounting blocks 301; the multi-station clamp can adjust the spacing when clamping workpieces of different sizes, so as to prevent the workpieces of larger sizes from affecting each other in processing and reduce the processing speed; When clamping a larger workpiece, the outermost movable mounting blocks 301 on both sides of the fixed mounting block 201 rotate so that the two are in contact with the two sides of the workpiece respectively, and the screw rod 202 rotates to reduce the distance between the fixed mounting block 201 and the movable mounting block 301, and the movable mounting block 301 in contact with the workpiece squeezes and clamps the workpiece; larger workpieces can be clamped separately, avoiding the need to replace different fixtures, increasing the working speed, and facilitating the use of the device in production.

[0023] For example 2, please refer to Figure 3 , Figure 4 , Figure 5For the mobile clamping assembly 3, the mobile clamping assembly 3 also includes a mobile limit block 305, a limit wedge block 306, a rotation limit block 307, a limit threaded rod 308 and a wedge block moving rod 309. A wedge block installation groove is provided in the rotation installation mouth. The mobile limit block 305 is slidably installed in the wedge block installation groove. The limit wedge block 306 is arranged below the mobile limit block 305. The limit wedge block 306 is slidably installed in the wedge block installation groove. The rotation limit block 307 is slidably installed in the rotation installation mouth. A threaded installation mouth is provided at one end of the mobile installation block 301. The limit threaded rod 308 passes through the threaded installation mouth and is rotatably connected to the rotation limit block 307. The movable mounting block 301 is connected and threadedly cooperates with the threaded mounting port. A movable mounting groove is opened at one end of the movable mounting block 301, and the movable mounting groove is communicated with the wedge block mounting groove. The wedge block movable rod 309 passes through the movable mounting groove and is fixedly connected with the limiting wedge block 306; when the movable rotating block 204 moves into the rotating connection groove, the movable mounting block 301 can be fixedly connected with the fixed mounting block 201, and when the connecting screw rod 302 rotates, the connecting sleeve 303 can move, and the connecting sleeve 303 can drive the connecting rotating block 304 to move, and the connecting rotating block 304 can be connected with other movable rotating blocks 204, so that multiple movable rotating blocks 204 can be connected in sequence; See also Figure 5 The movable clamping assembly 3 also includes a connecting gear 310, a plurality of transmission gears 311 and a gear rotating rod 312. A transmission mounting groove is opened at one end of the movable mounting block 301, and the transmission mounting groove is connected to the connecting mounting groove. The connecting gear 310 is rotatably mounted in the connecting mounting groove. The connecting screw rod 302 is fixedly connected to the connecting gear 310. The transmission gear 311 is rotatably mounted in the transmission mounting groove, and the transmission gear 311 is meshed with the adjacent transmission gear 311. The transmission gear 311 closest to the connecting gear 310 is meshed with the connecting gear 310. The movable mounting block 301 is movably and fixedly mounted with a rotating rod mounting block. The gear rotating rod 312 passes through the rotating rod mounting block and is fixedly connected to the outermost transmission gear 311. The connecting sleeve 303 is slidably mounted in the connecting mounting groove. See also Figure 7 , Fig. 9 The mobile clamping assembly 3 also includes a mobile clamping plate 313 and a mobile clamping screw 314. The mobile clamping plate 313 is slidably mounted on the top surface of the mobile mounting block 301. A screw mounting block is fixedly mounted on the top surface of the mobile mounting block 301. The mobile clamping screw 314 passes through the screw mounting block and is rotatably connected to the mobile clamping plate 313. The mobile clamping screw 314 is rotatably connected to the screw mounting block by thread. See also Figure 6The movable clamping assembly 3 also includes a limit plate 315, a limit mounting block 316, a return spring 317, a limit rod 318 and a toggle rod 319. Two limit holes are provided at one end of the movable mounting block 301, and the limit holes are arranged above the wedge block mounting groove. The limit plate 315 is fixedly installed at one end of the wedge block movable rod 309, and the limit mounting block 316 is fixedly installed on one side of the limit plate 315. A sliding limit groove is provided at one end of the limit mounting block 316, and a limit rod 318 is slidably installed in the sliding limit groove. The return spring 317 is arranged in the sliding limit groove. One end of the return spring 317 is fixedly connected to the limit rod 318, and the other end is fixedly connected to the inner wall of the sliding limit groove. A moving groove is provided on the top surface of the limit mounting block 316, and the toggle rod 319 passes through the moving groove and is fixedly connected to the limit rod 318; See also Figure 4 , one end of the movable rotating block 204 and the connecting rotating block 304 is cylindrical, and one end of the movable limiting block 305 is a concave arc surface; See also Figure 6 , the outer contour of the limiting rod 318 is the same as the inner contour of the limiting hole; When in use, when the mobile rotating block 204 moves into the rotating installation opening, the wedge block moving rod 309 moves to drive the limiting wedge block 306 to move horizontally, and the limiting wedge block 306 moves to drive the mobile limiting block 305 to move upward, and the mobile limiting block 305 limits the mobile rotating block 204 so that the mobile rotating block 204 can only rotate, and the limiting threaded rod 308 rotates to drive the rotating limiting block 307 to move, and the rotating limiting block 307 contacts the mobile rotating block 204, and the mobile rotating block 204 is limited and fixed, so that the position of the mobile rotating block 204 is fixed; The gear rotating rod 312 rotates to drive the connecting gear 310 to rotate through the transmission gear 311, the connecting gear 310 rotates to drive the connecting screw rod 302 to rotate, the connecting screw rod 302 rotates to drive the connecting sleeve 303 to move, and the connecting sleeve 303 drives the adjacent movable fixed block 301 to move; The movable clamping screw 314 rotates to drive the movable clamping plate 313 to move, and the movable clamping plate 313 cooperates with the movable mounting block 301 to clamp and fix the workpiece on the top surface of the movable mounting block 301; When the movable rotating block 204 enters the rotating installation opening, the toggle rod 319 is pulled to move the limit rod 318 out of the limit groove, and the wedge block moving rod 309 moves. When the limit wedge block 306 moves to drive the movable limit block 305 to limit the movable rotating block 204, the return spring 317 pushes the limit rod 318 to move into the limit hole, completing the limit work of the movable limit block 305. The cylindrical shape facilitates the movement of the rotating block 204 and the connection rotating block 304; The limiting rod 318 will not move after entering the limiting hole, so as to prevent the movement of the wedge block moving rod 309 from affecting the limiting work of the movable limiting block 305 .

[0024] For example 3, please refer to Figure 7 , Figure 8 , for the fixed clamping assembly 2, the fixed clamping assembly 2 also includes a driving gear 205, a plurality of rotating gears 206, a driving gear 207 and an active rotating rod 208. Two driving gears 205 are rotatably installed in the rotating installation opening, and the driving gears 205 are respectively fixedly connected to the rotating screw 202. A driving installation groove is provided at one end of the fixed installation block 201, and the driving installation groove is communicated with the rotating installation opening. A plurality of rotating gears 206 are rotatably installed on both sides of the inner wall of the driving installation groove. The rotating gears 206 are meshed with adjacent rotating gears 206, and the rotating gear 206 closest to the driving gear 205 is meshed with the driving gear 205. A gear mounting plate is fixedly installed at one end of the fixed installation block 201, and the active gear 207 is rotatably installed on one side of the gear mounting plate, and the active gear 207 is meshed with the outermost active gear 207. The active rotating rod 208 is arranged on the other side of the gear mounting plate, and the active rotating rod 208 passes through the gear mounting plate and is fixedly connected to the active gear 207. The movable sleeve 203 is slidably installed in the rotating installation opening; See also Fig. 9 , Fig.10 The fixed clamping assembly 2 also includes a fixed clamping plate 209 and a fixed clamping screw 210. The fixed clamping plate 209 is slidably mounted on the top surface of the fixed mounting block 201. A screw mounting plate is fixedly mounted on the top surface of the fixed mounting block 201. The fixed clamping screw 210 passes through the screw mounting plate and is rotatably connected to the fixed clamping plate 209. The fixed clamping screw 210 is rotatably connected to the screw mounting plate by thread. When in use, the active rotating rod 208 rotates to drive the active gear 207 to rotate, the active gear 207 rotates through the rotating gear 206 to drive the driving gear 205 to rotate, the driving gear 205 rotates to drive the rotating screw rod 202 to rotate, the rotating screw rod 202 rotates to drive the movable sleeve 203 to move toward each other, so that the distance between the movable installation block 301 and the fixed installation block 201 is reduced, and the rotating screw rod 202 rotates to drive the movable sleeve 203 to move away from each other, so that the distance between the movable installation block 301 and the fixed installation block 201 is increased; The fixed clamping screw 210 rotates to drive the fixed clamping plate 209 to move, and the fixed clamping plate 209 cooperates with the fixed installation block 201 to clamp and fix the workpiece on the top surface of the fixed installation block 201.

[0025] Embodiment 4, a method for using a multi-workpiece fixture for a general machine tool, using the multi-workpiece fixture, comprises the following steps: When clamping multiple workpieces; The rotating screw 202 rotates, the rotating screw 202 drives the moving sleeve 203 to move, and the moving sleeve 203 drives the moving rotating block 204 to move; The movable rotating block 204 moves to drive the movable installation block 301 to move, and the distance between the fixed installation block 201 and the movable installation block 301 is adjusted; The connecting screw rod 302 rotates, the connecting sleeve 303 at the top of the connecting screw rod 302 moves, and the connecting sleeve 303 drives the connecting rotating block 304 to move; The connecting rotating block 304 moves to drive the adjacent movable installation blocks 301 to move, and the distance between the movable installation blocks 301 is adjusted; When clamping an enlarged workpiece, the outermost movable mounting blocks 301 on both sides of the fixed mounting block 201 rotate so that the two respectively contact the two sides of the workpiece, and the screw rod 202 rotates to reduce the distance between the fixed mounting block 201 and the movable mounting block 301, so that the movable mounting block 301 in contact with the workpiece squeezes and clamps the workpiece.

[0026] In summary, with the aid of the above technical solution of the present invention, when the device is used, when multiple workpieces are clamped, the workpieces are placed on the top surface of the fixed mounting block 201, and the fixed clamping screw 210 rotates to drive the fixed clamping plate 209 to move, and the fixed clamping plate 209 cooperates with the fixed mounting block 201 to clamp and fix the workpieces on the top surface of the fixed mounting block 201; movable fixed blocks 301 are arranged on both sides of the fixed mounting block 201, and the movable fixed blocks 301 move toward the direction close to the fixed mounting block 201, and when the movable rotating block 204 moves into the rotating mounting opening, the wedge block moving rod 309 moves to drive the limiting wedge block 306 to move horizontally, and the limiting wedge block 306 moves The movable limit block 305 is driven to move upward, and the movable limit block 305 limits the movable rotating block 204, so that the movable rotating block 204 can only rotate, and the limit threaded rod 308 rotates to drive the rotation limit block 307 to move, and the rotation limit block 307 contacts the movable rotating block 204, and the movable rotating block 204 is limited and fixed, so that the position of the movable rotating block 204 is fixed, and the toggle rod 319 is pulled to make the limit rod 318 move out of the limit groove, and the wedge block moving rod 309 moves. When the limit wedge block 306 moves to drive the movable limit block 305 to limit the movable rotating block 204, the return spring 317 pushes the limit rod 318 to move into the limit hole , complete the limiting work of the mobile limiting block 305, so that the mobile fixed block 301 is fixed to the mobile rotating block 204, the active rotating rod 208 rotates to drive the active gear 207 to rotate, the active gear 207 rotates through the rotating gear 206 to drive the driving gear 205 to rotate, the driving gear 205 rotates to drive the rotating screw rod 202 to rotate, the rotating screw rod 202 rotates to drive the mobile sleeve 203 to move towards each other, so that the distance between the mobile installation block 301 and the fixed installation block 201 is reduced, the rotating screw rod 202 rotates to drive the mobile sleeve 203 to move back, so that the distance between the mobile installation block 301 and the fixed installation block 201 is increased, and the fixed installation block 201 and the mobile installation block 301 are adjusted. The distance between the fixed blocks 301; the workpieces are placed on the top surfaces of the movable fixed blocks 301 on both sides of the fixed mounting block 201 in sequence, the movable clamping screw 314 rotates to drive the movable clamping plate 313 to move, the movable clamping plate 313 cooperates with the movable mounting block 301 to clamp and fix the workpiece on the top surface of the movable mounting block 301, the gear rotating rod 312 rotates to drive the connecting gear 310 to rotate through the transmission gear 311, the connecting gear 310 rotates to drive the connecting screw 302 to rotate, the connecting screw 302 rotates to drive the connecting sleeve 303 to move, the connecting sleeve 303 drives the adjacent movable fixed blocks 301 to move, and the distance between the movable fixed blocks 301 is adjusted; When clamping a larger workpiece, the limiting threaded rod 308 rotates, driving the rotation limiting block 307 to move, so that the rotation limiting block 307 moves away from the mobile rotating block 204, and the limit on the mobile rotating block 204 is released, so that the mobile rotating block 204 can rotate, and the outermost mobile mounting blocks 301 on both sides of the fixed mounting block 201 rotate so that the two are respectively in contact with the two sides of the workpiece. After contact, the limiting threaded rod 308 rotates, driving the rotation limiting block 307 to move, so that the rotation limiting block 307 moves closer The rotating block 204 moves in the direction of rotation, and the movable rotating block 204 is re-fixed. The active rotating rod 208 rotates to drive the active gear 207 to rotate. The active gear 207 rotates through the rotating gear 206 to drive the driving gear 205 to rotate. The driving gear 205 rotates to drive the rotating screw rod 202 to rotate. The rotating screw rod 202 rotates to drive the movable sleeve 203 to move toward each other, so that the distance between the movable installation block 301 and the fixed installation block 201 is reduced. The movable installation block 301 in contact with the workpiece squeezes and clamps the workpiece. When the number of workpieces to be processed increases, in order to increase the processing speed, additional mobile fixed blocks 301 are set on the mobile fixed blocks 301 on both sides, and the additional mobile fixed blocks 301 move toward the direction close to the fixed installation block 201. When the mobile rotating block 204 moves into the rotating installation opening, the wedge block moving rod 309 moves to drive the limiting wedge block 306 to move horizontally, and the limiting wedge block 306 moves to drive the mobile limiting block 305 to move upward. The mobile limiting block 305 limits the mobile rotating block 204 so that the mobile rotating block 204 can only rotate, and the limiting threaded rod 308 rotates to drive the rotating The limit block 307 moves, and the rotating limit block 307 contacts the movable rotating block 204, and the movable rotating block 204 is limited and fixed, so that the position of the movable rotating block 204 is fixed, and the toggle rod 319 is pulled to move the limit rod 318 out of the limit groove, and the wedge block moving rod 309 moves. When the limit wedge block 306 moves to drive the movable limit block 305 to complete the limit of the movable rotating block 204, the return spring 317 pushes the limit rod 318 to move into the limit hole, and the limit work of the movable limit block 305 is completed, so that the movable fixed block 301 is fixed to the movable rotating block 204; When the number of workpieces to be processed decreases, in order to prevent the parts not involved in the fixation from affecting the processing, the limiting threaded rods 308 corresponding to the movable fixed blocks 301 on both sides rotate, driving the rotating limiting block 307 to move, so that the rotating limiting block 307 moves in the direction away from the movable rotating block 204, releasing the limit on the movable rotating block 204, so that the movable rotating block 204 can rotate, pulling the toggle rod 319 to move the limiting rod 318 out of the limiting groove, the wedge block moving rod 309 moves, and when the limiting wedge block 306 moves to drive the movable limiting block 305 to release the limit on the movable rotating block 204, the return spring 317 pushes the limiting rod 318 to move into the limiting hole, completing the limiting work of the movable limiting block 305, the movable limiting block 305 releases the limit on the movable rotating block 204, the movable fixed blocks 301 on both sides release the fixed relationship with the adjacent movable rotating blocks, the movable fixed block 301 moves, and the fixed parts on the top surface of the mounting table 1 are reduced; In summary, with the help of the above technical solution of the present invention, the beneficial effects that can be achieved are: 1. When clamping multiple workpieces, the multi-station clamp can adjust the spacing when clamping workpieces of different sizes to prevent large workpiece sizes from affecting each other's processing and reducing the processing speed; the specific implementation steps are: place the workpiece on the top surface of the fixed mounting block 201, and the fixed clamping screw 210 rotates to drive the fixed clamping plate 209 to move, and the fixed clamping plate 209 cooperates with the fixed mounting block 201 to clamp and fix the workpiece on the top surface of the fixed mounting block 201; a movable fixed block 301 is set on both sides of the fixed mounting block 201, and the movable fixed block 301 moves toward the fixed mounting block 201. When the movable rotating block 204 moves into the rotating mounting opening, the wedge block moving rod 309 moves to drive the limit The wedge block 306 moves horizontally, and the movement of the limiting wedge block 306 drives the moving limiting block 305 to move upward. The moving limiting block 305 limits the moving rotating block 204, so that the moving rotating block 204 can only rotate. The limiting threaded rod 308 rotates to drive the rotating limiting block 307 to move. The rotating limiting block 307 contacts the moving rotating block 204, limits and fixes the moving rotating block 204, and fixes the moving rotating block 204. The position of the moving rotating block 204 is fixed, and the toggle rod 319 is pulled to make the limiting rod 318 move out of the limiting groove, and the wedge moving rod 309 moves. When the limiting wedge block 306 moves to drive the moving limiting block 305 to limit the moving rotating block 204, the return spring 317 pushes the limiting rod 318 to move The movable limit block 305 is moved into the limiting hole to complete the limiting work of the movable limit block 305, so that the movable fixed block 301 is fixed to the movable rotating block 204, the active rotating rod 208 rotates to drive the active gear 207 to rotate, the active gear 207 rotates through the rotating gear 206 to drive the driving gear 205 to rotate, the driving gear 205 rotates to drive the rotating screw rod 202 to rotate, the rotating screw rod 202 rotates to drive the movable sleeve 203 to move toward each other, so that the distance between the movable installation block 301 and the fixed installation block 201 is reduced, and the rotating screw rod 202 rotates to drive the movable sleeve 203 to move back to each other, so that the distance between the movable installation block 301 and the fixed installation block 201 is increased, and the fixed installation block 201 and the movable fixed block 301 are adjusted. 1; the workpieces are placed in sequence on the top surfaces of the movable fixed blocks 301 on both sides of the fixed mounting block 201, the movable clamping screw 314 rotates to drive the movable clamping plate 313 to move, the movable clamping plate 313 cooperates with the movable mounting block 301 to clamp and fix the workpiece on the top surface of the movable mounting block 301, the gear rotating rod 312 rotates to drive the connecting gear 310 to rotate through the transmission gear 311, the connecting gear 310 rotates to drive the connecting screw 302 to rotate, the connecting screw 302 rotates to drive the connecting sleeve 303 to move, the connecting sleeve 303 drives the adjacent movable fixed blocks 301 to move, and the distance between the movable fixed blocks 301 is adjusted, so as to achieve the effect of adjusting the distance between the workpieces; 2. When clamping a larger workpiece, it is possible to clamp the workpiece of larger size separately, avoiding the need to replace different clamps, improving the working speed, and facilitating the use of the device in production; the specific implementation steps are: the limiting threaded rod 308 rotates, driving the rotation limiting block 307 to move, so that the rotation limiting block 307 moves in the direction away from the movable rotating block 204, releasing the limit on the movable rotating block 204 so that the movable rotating block 204 can rotate, and the outermost movable mounting blocks 301 on both sides of the fixed mounting block 201 rotate so that the two are respectively in contact with the two sides of the workpiece. After contact, the limiting threaded rod 308 rotates, driving the rotation limiting block 307 to move, so that the rotation limiting block 307 moves in the direction close to the movable rotating block 204, The block 204 is re-fixed, the active rotating rod 208 rotates to drive the active gear 207 to rotate, the active gear 207 rotates to drive the driving gear 205 to rotate through the rotating gear 206, the driving gear 205 rotates to drive the rotating screw rod 202 to rotate, the rotating screw rod 202 rotates to drive the movable sleeve 203 to move towards each other, so that the distance between the movable mounting block 301 and the fixed mounting block 201 is reduced, and the movable mounting block 301 in contact with the workpiece squeezes and clamps the workpiece, and the movable mounting blocks 301 on both sides of the movable fixed mounting block 201 are moved to contact the workpiece and squeeze, clamp and fix the workpiece, and the workpieces of different sizes can be clamped by changing the number of movable mounting blocks 301 on both sides of the fixed mounting block 201; 3. A separate movable installation block 301 can be dismantled and installed without dismantling other movable installation blocks 301 for assembly, which is convenient for operators to dismantle and install daily, saves time and has a high degree of installation. The specific implementation steps are: when the number of workpieces to be processed increases, in order to increase the processing speed, a new movable fixed block 301 is set on the side of the outermost movable fixed block 301, and the new movable fixed block 301 moves toward the direction close to the fixed installation block 201. When the movable rotating block 204 moves into the rotating installation opening, the wedge block moving rod 309 moves to drive the limit wedge block 306 to move horizontally The limit wedge block 306 moves to drive the movable limit block 305 to move upward, and the movable limit block 305 limits the movable rotating block 204, so that the movable rotating block 204 can only rotate, and the limit threaded rod 308 rotates to drive the rotation limit block 307 to move, and the rotation limit block 307 contacts the movable rotating block 204, and limits and fixes the movable rotating block 204, so that the position of the movable rotating block 204 is fixed, and the toggle rod 319 is pulled to make the limit rod 318 move out of the limit groove, and the wedge moving rod 309 moves. When the limit wedge block 306 moves to drive the movable limit block 305 to move the movable rotating block 20 When the limiting is completed, the return spring 317 pushes the limiting rod 318 to move into the limiting hole, completing the limiting work of the movable limiting block 305, so that the movable fixed block 301 is fixed to the movable rotating block 204; when the number of workpieces to be processed decreases, in order to prevent the parts not involved in the fixing from affecting the processing, the two movable fixed blocks 301 located on the outermost side are disassembled, and the limiting threaded rod 308 corresponding to the outermost movable fixed block 301 rotates, driving the rotating limiting block 307 to move, so that the rotating limiting block 307 moves away from the movable rotating block 204, releasing the limiting of the movable rotating block 204, and allowing the movable fixed block 301 to move. The rotating block 204 can rotate, pulling the toggle rod 319 to move the limit rod 318 out of the limit groove, and the wedge block moving rod 309 moves. When the limit wedge block 306 moves to drive the movable limit block 305 to release the limit on the movable rotating block 204, the return spring 317 pushes the limit rod 318 to move into the limit hole, completing the limiting work of the movable limit block 305. The movable limit block 305 releases the limit on the movable rotating block 204, and the movable fixed blocks 301 on both sides release the fixed relationship with the adjacent movable rotating blocks. The movable fixed block 301 moves to reduce the fixed parts on the top surface of the mounting table 1.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The preferred embodiments of the invention disclosed above are only used to help illustrate the invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can better understand and use the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-workpiece fixture, comprising a mounting table, a fixed clamping assembly and a movable clamping assembly, characterized in that: The fixed clamping assembly is arranged on the top surface of the mounting platform, and a plurality of movable clamping assemblies are arranged on both sides of the fixed clamping assembly; The fixed clamping assembly comprises a fixed mounting block, a rotating screw, a movable sleeve and a movable rotating block, wherein the fixed mounting block is fixedly mounted on the top surface of the mounting platform, a rotating mounting opening is provided on the side of the fixed mounting block, two rotating screws are rotatably mounted on the rotating mounting opening, the rotating screw is threadedly sleeved with the movable sleeve, and the movable rotating block is fixedly mounted on one end of the movable sleeve; When the rotating screw is rotated, the movable sleeve can be moved, and the movable sleeve can drive the movable rotating block to move; The movable clamping assembly includes a movable mounting block, a connecting screw, a connecting sleeve and a connecting rotating block. The movable mounting block is arranged on the top surface of the mounting platform. A rotating connecting groove is provided on one side of the movable mounting block, and a connecting mounting groove is provided on the other side. The connecting screw is rotatably installed in the connecting mounting groove. The connecting sleeve is threadedly sleeved on the connecting screw, and the connecting rotating block is fixedly installed on one side of the connecting sleeve.

2. A multi-workpiece fixture according to claim 1, characterized in that: The movable clamping assembly also includes a movable limit block, a limit wedge block, a rotation limit block, a limit threaded rod and a wedge block movable rod, the rotation mounting opening is provided with a wedge block mounting groove, the movable limit block is slidably installed in the wedge block mounting groove, the limit wedge block is arranged below the movable limit block, the limit wedge block is slidably installed in the wedge block mounting groove, the rotation limit block is slidably installed in the rotation mounting opening, a threaded mounting opening is provided at one end of the movable mounting block, the limit threaded rod passes through the threaded mounting opening and is rotatably connected to the rotation limit block, and is connected to the threaded mounting opening The mounting thread is matched, and a movable mounting groove is opened at one end of the movable mounting block, and the movable mounting groove is communicated with the wedge block mounting groove, and the wedge block moving rod passes through the movable mounting groove and is fixedly connected with the limiting wedge block; when the movable rotating block moves into the rotating connection groove, the movable mounting block can be fixedly connected with the fixed mounting block, and when the connecting screw rod rotates, the connecting sleeve can move, and the connecting sleeve can drive the connecting rotating block to move, and the connecting rotating block can be connected with other movable rotating blocks, so that multiple movable rotating blocks can be connected in sequence.

3. A multi-workpiece fixture according to claim 2, characterized in that: The movable clamping assembly also includes a connecting gear, a plurality of transmission gears and a gear rotating rod. A transmission mounting groove is opened at one end of the movable mounting block, and the transmission mounting groove is connected to the connecting mounting groove. The connecting gear is rotatably mounted in the connecting mounting groove. The connecting screw is fixedly connected to the connecting gear. The transmission gear is rotatably mounted in the transmission mounting groove, and the transmission gear is meshed with the adjacent transmission gear. The transmission gear closest to the connecting gear is meshed with the connecting gear. A rotating rod mounting block is movably and fixedly mounted on the movable mounting block. The gear rotating rod passes through the rotating rod mounting block and is fixedly connected to the outermost transmission gear. The connecting sleeve is slidably mounted in the connecting mounting groove.

4. A multi-workpiece fixture according to claim 3, characterized in that: The mobile clamping assembly also includes a mobile clamping plate and a mobile clamping screw. The mobile clamping plate is slidably mounted on the top surface of the mobile mounting block. A screw mounting block is fixedly mounted on the top surface of the mobile mounting block. The mobile clamping screw passes through the screw mounting block and is rotatably connected to the mobile clamping plate. The mobile clamping screw is threadably rotatably connected to the screw mounting block.

5. The multi-workpiece fixture according to claim 4, characterized in that: The fixed clamping assembly also includes a driving gear, a plurality of rotating gears, a driving gear and an active rotating rod, two of the driving gears are rotatably installed in the rotating mounting mouth, and the driving gears are respectively fixedly connected to the rotating screw rod, a driving mounting groove is opened at one end of the fixed mounting block, the driving mounting groove is communicated with the rotating mounting mouth, and a plurality of rotating gears are rotatably installed on both sides of the inner wall of the driving mounting groove, the rotating gears are meshed with adjacent rotating gears, and the rotating gear closest to the driving gear is meshed with the driving gear, a gear mounting plate is fixedly installed at one end of the fixed mounting block, the driving gear is rotatably installed on one side of the gear mounting plate, and the driving gear is meshed with the outermost driving gear, the active rotating rod is arranged on the other side of the gear mounting plate, and the active rotating rod passes through the gear mounting plate and is fixedly connected to the driving gear, and the movable sleeve is slidably installed in the rotating mounting mouth.

6. A multi-workpiece fixture according to claim 5, characterized in that: The fixed clamping assembly also includes a fixed clamping plate and a fixed clamping screw. The fixed clamping plate is slidably mounted on the top surface of the fixed mounting block. A screw mounting plate is fixedly mounted on the top surface of the fixed mounting block. The fixed clamping screw passes through the screw mounting plate and is rotatably connected to the fixed clamping plate. The fixed clamping screw is threadably connected to the screw mounting plate.

7. A multi-workpiece fixture according to claim 6, characterized in that: The movable clamping assembly also includes a limit plate, a limit mounting block, a return spring, a limit rod and a toggle rod, one end of the movable mounting block is provided with two limit holes, the limit hole is arranged above the wedge block mounting slot, one end of the wedge block moving rod is fixedly installed with the limit plate, and one side of the limit plate is fixedly installed with the limit mounting block, one end of the limit mounting block is provided with a sliding limit groove, the limit rod is slidably installed in the sliding limit groove, the return spring is arranged in the sliding limit groove, one end of the return spring is fixedly connected to the limit rod, and the other end is fixedly connected to the inner wall of the sliding limit groove, the top surface of the limit mounting block is provided with a moving groove, and the toggle rod passes through the moving groove and is fixedly connected to the limit rod.

8. The multi-workpiece fixture according to claim 7, characterized in that: One end of the movable rotating block and the connecting rotating block is cylindrical, and one end of the movable limiting block is a concave arc surface.

9. The multi-workpiece fixture according to claim 7, characterized in that: The outer contour of the limiting rod is the same as the inner contour of the limiting hole.

10. A method for using a multi-workpiece fixture for a general machine tool, characterized in that: The multi-workpiece fixture as claimed in any one of claims 1 to 9 is used, comprising the following steps: When clamping multiple workpieces; The rotating screw rotates, the rotating screw drives the movable sleeve to move, and the movable sleeve drives the movable rotating block to move; The movement of the movable rotating block drives the movable installation block to move, thereby adjusting the distance between the fixed installation block and the movable installation block; The connecting screw is rotated, the connecting sleeve at the top of the connecting screw moves, and the connecting sleeve drives the connecting rotating block to move; The movement of the connecting rotating block drives the adjacent movable installation blocks to move, thereby adjusting the distance between the movable installation blocks; When clamping an enlarged workpiece, the outermost movable mounting blocks on both sides of the fixed mounting block rotate so that the two are respectively in contact with the two sides of the workpiece, and the rotating screw rotates to reduce the distance between the fixed mounting block and the movable mounting block, so that the movable mounting block in contact with the workpiece squeezes and clamps the workpiece.

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