CN114473565A - Comprehensive process clamp for machining engine connecting rod - Google Patents

Abstract

The invention relates to a comprehensive process fixture for processing engine connecting rods, which is used in the field of mechanical processing. The fixture includes a rotating four-axis and a disc brake tailstock working with the fixture, and also includes a base plate, a four-axis backing plate, a tailstock backing plate, a four-axis connecting plate, a tailstock connecting plate, a rotating bridge plate, and a small head positioning device, bulkhead positioning device and bulkhead clamping device. This product can automatically clamp the workpiece, with good clamping effect, and the center distance between the big end and the small end of the positioning connecting rod can be adjusted to adapt to the processing of different types of workpieces, thereby greatly improving the production efficiency. It is used for processing engine connecting rods. A comprehensive fixture for drilling and boring small-end hole chamfering, rough boring large-end hole chamfering, milling reverse dimples, milling pressure bearing surfaces, drilling and tapping holes.

Description

A comprehensive process fixture for machining engine connecting rod

technical field

The invention relates to a comprehensive process fixture for processing engine connecting rods, which is used in the field of mechanical processing.

Background technique

In the prior art, most of the fixtures for processing the connecting surface of the engine connecting rod and drilling and tapping the bolt holes are arranged in a single-station or few-station arrangement, which makes the production efficiency relatively low. Therefore, in order to improve the production efficiency, such as the Chinese Patent No. 201320333640.5 Disclosed is a fixture for processing the connecting surface of an engine connecting rod, including a fixture tread plate, a bolt surface positioning block, a fastening screw, a positioning mandrel, a large-end semicircular flat washer, a bolt surface clamping screw, and a small-end circular flat washer. , clamping screw positioning block, small head side positioning block, small head top positioning block, large head top positioning block, small head clamping screw, the fixture tire plate is provided with a large head semicircular flat pad and a small head round flat pad, both of which The large end and the small end of the connecting rod are placed above, and the thickness of the flat pad is the same. The large-end semi-circular flat washer is provided with a threaded positioning mandrel, and one side of the large-end semi-circular flat washer is provided with a bolt surface positioning block. Fixing, the other side is provided with a bolt surface clamping screw, a large-head top positioning block is provided under the large-head semi-circular flat pad, a small-head side positioning block is provided on one side of the small-head circular flat pad, and the other side is provided with a small-head clamping block Screw, there is a small head top positioning block under the small head circular flat washer, the bolt surface clamping screw and the small head clamping screw are installed on the clamping screw positioning block, the clamping screw positioning block, the small head side positioning block, The positioning block at the top of the small head and the positioning block at the top of the big head are also fixed on the fixture tire plate with fastening screws, and the positioning pin holes are mostly fixed pin holes.

The above products can clamp multiple workpieces at one time. Although the processing efficiency is improved, there are still the following defects: (1) The clamping device uses fastening screws to clamp the side of the workpiece. Tighten the fastening screw to clamp the workpiece, which leads to cumbersome clamping operation and low work efficiency, and the workpiece is clamped by tightening the clamping nut to lock the pressure plate. Due to the limited force of manually tightening the locking nut, so For the workpiece, the workpiece is clamped by tightening the fastening screws. If the clamping force is not enough, the workpiece may be loose. It is difficult to process in the subsequent processing, and the processing error is increased, so that the workpiece cannot achieve the required accuracy. Increase the manufacturing cost; (2) The center distance between the big end and the small end of the positioning connecting rod cannot be adjusted. This kind of fixture can only process a single type of connecting rod, and cannot adapt to the processing of different types of connecting rods. The versatility is poor, resulting in work efficiency. low.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and provide a kind of automatic clamping of workpieces, good clamping effect, and adjustable center distance between the large end and the small end of the positioning connecting rod, so as to adapt to different types of The processing of workpieces, thus greatly improving the production efficiency, is used for processing engine connecting rods, drilling and boring small-end hole chamfering, rough boring large-end hole chamfering, milling reverse dimples, milling pressure bearing surfaces, drilling and tapping threaded holes. .

The present invention adopts the technical scheme as follows:

A comprehensive process fixture for processing engine connecting rods, including a base plate, a four-axis backing plate, a tailstock backing plate, a rotating four-axis, a disc brake tailstock, a four-axis connecting plate, a tailstock connecting plate, a rotating bridge plate, and a small head positioning A moving upper plate, a plurality of large head positioning devices fixedly arranged in rows on the rotating bridge plate, a plurality of small head positioning devices movably arranged in rows on the movable upper plate for small head positioning, and a small head positioning device for clamping A clamping device for workpieces, the one large head positioning device includes a large head positioning device base, a large head positioning device base assembly for pushing and positioning the large head end face and supporting the end face of the connecting rod, and the one small head positioning device includes a small head for positioning and positioning the shape of the small head The small head positioning base supporting the small head end face of the connecting rod, the clamping device is driven by the oil cylinder to clamp the workpiece.

The fixture of the present invention is provided with positioning devices in rows and a clamping device for clamping workpieces, which can clamp multiple workpieces at one time, and the benchmarks are all unified, the structure is simple, and the operation is convenient, which not only improves the processing efficiency, but also ensures The precision and quality of the workpiece; the clamping device of the fixture of the present invention is driven by the oil cylinder to clamp the workpiece, which can automatically clamp the workpiece, and the clamping effect is good, which greatly improves the machining accuracy of the workpiece; the positioning device for positioning the small end of the connecting rod can be movably set , The positioning device relative to the big head can adjust the center distance between the big head and the small head, so as to adapt to the processing of workpieces with different sizes and models, and can be used for the processing of various types of connecting rods. It has good practicability and greatly improves the processing efficiency. .

Preferably, the clamping device includes a bidirectional clamping piece and a unidirectional clamping piece driven by an oil cylinder to clamp the workpiece, the adjacent workpieces are clamped by the bidirectional clamping piece, and the outer sides of the workpieces located at both ends are clamped by the unidirectional clamping piece. Fasteners are clamped.

Preferably, the two-way clamping member includes a clamping block 1, a support column supporting the clamping block 1, and an oil cylinder 1 for clamping and adjusting the steering of the clamping block 1, and the clamping block 1 includes a symmetrical arrangement. The clamping part 1 and clamping part 2 and the connecting part 1 connected with the upper end of the support column 1, the clamping part 1, clamping part 2 and the connecting part 1 are integrated in structure, and the lower end of the connecting part is provided with a shaft Hole 1, the upper end of the support column is provided with a shaft hole 2 that matches with the shaft hole 1, and a movable pin 1 connecting the clamping block 1 and the support column 1 is installed on the shaft hole 1 and the shaft hole 2 , the clamping block rotates around the support column with the movable pin as the axis to realize the clamping and loosening of the workpiece.

Preferably, the one-way clamping piece includes a second clamping block, a second supporting column supporting the second clamping block, and a second oil cylinder for clamping and adjusting the steering of the second clamping block, and the second clamping block includes a second clamping block. The third part, the supporting part and the connecting part 2 connected with the upper end of the supporting column 2, the clamping part 3, the supporting part and the connecting part 2 are integral structures, the lower end of the connecting part 2 is provided with a shaft hole 3, and the supporting column The upper end of the second is provided with a shaft hole 4 that is three-phase matched with the shaft hole, and a movable pin 2 connecting the clamping block 2 and the support column 2 is installed on the shaft hole 3 and the shaft hole 4. The clamping block 2 The second movable pin is used as the axis to rotate around the second supporting column to realize the clamping and loosening of the workpiece.

Preferably, the supporting plate is provided with a supporting column 1 for supporting the supporting portion on the clamping block 2. The workpieces located at both ends of the outer side are clamped by the one-way clamps respectively, and the workpieces located at both ends are clamped to the outside by the clamping parts of the one-way clamps. At the same time, in order to improve the balance of the one-way clamps Therefore, the support column 1 at the lower end of the support part can bear the clamping force and clamp the workpiece better; the clamping part 1 and the clamping part 2 included in the bidirectional clamping part can simultaneously clamp the adjacent workpieces. The end of the clamp makes the structure compact, greatly saves the installation space, and has a good clamping effect; the one-way clamp is provided by the second cylinder to provide the driving force to realize the clamping and loosening of the workpiece, and the two-way clamp is provided by the cylinder one. The driving force is used to realize the clamping and loosening of the workpiece, and there is no need to manually realize the clamping, which greatly improves the work efficiency, and the clamping effect is good, so as to better prepare the workpiece for processing. When the workpiece is clamped, the second clamping block is driven to clamp the end of the workpiece. After the workpiece is processed, the second hydraulic cylinder is used to drive the clamping block 2 to rotate 90 degrees around the supporting column 2 with the movable pin 2 as the axis. , the second clamping block leaves the end of the workpiece, and then loosens the workpiece, and the finished workpiece can be removed, and so on, to realize batch processing of the workpiece. When clamping the workpiece, the first clamping block is driven to clamp the ends of the two connected workpieces. When the machining is completed, the clamping block is driven by the oil cylinder to rotate around the supporting column 2 by 90 degrees with the movable pin 1 as the axis. Once the clamping block leaves the end of the workpiece, and then loosens the workpiece, the processed workpiece can be removed. Repeat this to realize batch processing of the workpiece. The corner cylinder is clamped and released at 90 degrees, so that the workpiece is Easy to load and unload, greatly improved.

Preferably, the first clamping part, the second clamping part and the third clamping part are respectively provided with large pressure blocks.

The clamping part 1, clamping part 2 and clamping part 3 are respectively provided with large pressure blocks. When machining workpieces of different sizes and models, due to the different thicknesses of the workpiece connecting rods, according to the different thicknesses of the connecting rods For the needs of clamping parts, the relative position of the two-way clamping part and the one-way clamping part and the connecting rod can be adjusted by the big head pressing block, and then the workpiece can be clamped. It has good flexibility and can be applied to the processing of various connecting rods with similar structures, which greatly saves the development time and production cost of the fixture.

The one small head positioning device has an integrated structure, and the small head positioning device includes a small head positioning and moving upper plate, a small head positioning and moving upper plate T-nut, a small head shape positioning and a supporting link small head positioning V-shaped and The end face positioning block, the small head positioning base supporting the small head end face of the connecting rod, and the small head clamping device; the small head positioning mobile upper plate T-type nut can be positioned by being inserted into the T-shaped groove of the rotatable bridge plate with fixed effect.

The small head positioning moving upper plate, the small head positioning base, the small head shape positioning and the small head end face positioning block of the supporting connecting rod, and the small head pressing oil cylinder device are integrated into one structure, the structure is simple and the installation is convenient; according to the size of the workpiece connecting rod If necessary, adjust the center distance between the small end positioning device and the large end positioning device to locate the connecting rod. When the center distance between the small end positioning device and the large end positioning device is adjusted to the required center distance, pass the T-nut Through the mounting hole on the adjustment block, the lower end of the T-shaped nut is embedded in the T-shaped groove, and then the T-shaped nut is relatively tightened. In this way, the processing of other types of connecting rods can be adjusted in a similar way. It has good flexibility and can be applied to Processing a variety of connecting rods with similar structures, this fixture combines the previous 1. Rough boring of large-end holes and chamfers, 2. Drilling and boring of small-end holes and chamfers, 3. Machining the reverse side dimples, 4. Machining the bearing surface In the drilling and tapping process, the four fixtures are integrated into a sequence fixture, which greatly saves the development time and production cost of the fixture, and saves the cost of the machine tool and the cost of personnel arrangement.

The outer shape of the small head is positioned as an inverted cone fixed V shape.

The big head positioning device is a self-centering mechanism.

The outer shape of the small head is positioned as an inverted cone fixed V shape, which plays the role of positioning and supporting the workpiece. The large head positioning device is a self-centering and centring mechanism, which plays the role of positioning and supporting the workpiece, and can also prevent the workpiece from rotating and better positioning. Workpiece connecting rod.

Preferably, it also includes a four-axis backing plate for supporting the four-axis supporting and rotating, one side of the four-axis backing plate bears the bottom surface of the four-axis rotating, and one side is fixed on the bottom plate; The tailstock pad of the disc brake tailstock, one side of the tailstock pad supports the bottom surface of the disc brake tailstock, and one side is fixed on the bottom plate.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

Figure 1 is a schematic diagram of the structure of the product.

Figure 2 is the second structural schematic diagram of the product.

Figure 3 is a schematic diagram of the small head positioning mechanism of the product.

FIG. 4 is a front view of an embodiment of the product after the clamp connecting rod is clamped.

Figure 5 is a schematic diagram of the structure of the clamping in the positioning part of the big end face of the product.

Figure 6 is a schematic structural diagram of the small end face of the product and the shape positioning mechanism.

Figure 7 is an exploded view of the product's large-end two-way clamp.

Figure 8 is an exploded view of the large-end one-way clamp of the product.

Part number description: Rotary four-axis 1, disc brake tailstock 2, bottom plate 100, four-axis backing plate 200, tailstock backing plate 300, four-axis connecting plate 400, tailstock connecting plate 500, rotatable bridge plate 600, small The head positioning device 700 , the big head positioning device 800 , and the big head clamping device 900 .

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example:

As shown in Figures 1-4, as an embodiment of the present invention, a method for machining engine drilling and boring small-end hole chamfering, rough boring large-end hole chamfering, milling reverse dimples, milling pressure-bearing surfaces, drilling, tapping The clamp for threaded holes includes a base plate 100, a rotating four-axis 1 arranged on the base plate 100 and fixed on the four-axis backing plate 200 in parallel with the base plate 100 (that is, the CNC large-aperture rotary table is a procurement standard part), fixed on the tailstock The disc brake tailstock 2 of the backing plate 300 (standard parts purchased), the four-axis connecting plate 400 is fixed on the rotating four-axis, the tailstock connecting plate 500 is fixed on the disc brake tailstock 2, and is connected with the four-axis connecting plate 400 and the four-axis connecting plate 400. A rotatable bridge plate 600 fixed on the tailstock connecting plate 500; a plurality of large head positioning devices 800 fixed in rows on the rotatable bridge plate 600, and a plurality of rows of rotatable bridge plates 600 movably arranged on the rotatable bridge plate 600 (movable) The small head positioning device 700 and the large head clamping device 900 arranged on the rotatable bridge plate 600 for clamping the workpiece, the one large head positioning device 800 includes a large head positioning device base 801 for positioning the large head shape. The big head positioning end face block 802 for end face pushing and positioning, the big head pushing positioning pressure plate 803 for supporting the end face positioning of the connecting rod, and the large head positioning device base 801 for supporting the big head end face of the connecting rod. The small head positioning device 700 includes a small head positioning and moving upper Plate 701, small head positioning and moving upper plate T-nut 702, small head shape positioning and support rod 704 on the small head end face of the connecting rod, small head positioning base supporting the small head end face of the connecting rod Small head positioning base 703 and small head positioning base 703. The head clamping device 1000, the big head positioning device 800, the big head positioning device base 801 are fixed on the rotatable bridge plate 600 by screws, the big head positioning end face block 802 is fixed on the big head positioning device base 801 by screws, and the big head pushes the positioning pressure plate 803 The drive shaft 804 is fixed on the drive shaft 804 through the hole, the drive shaft 804 is fixed on the hole of the base 801 of the big head positioning device, the left sub-middle pressure plate 805 is fixed on the sub-center transmission shaft 806 through the hole, and the sub-center transmission shaft 806 is fixed on the big head position through the hole On the device base 801, the right sub-center pressure plate 807 is fixed on the sub-center transmission shaft 806 through the hole, the sub-center transmission shaft 806 is fixed on the large head positioning device base 801 through the hole, and the left and right sub-center pressure plates 805807 are passed through the self-centering cylinder 1200. To realize automatic centering and clamping of the workpiece, the large head pushes the positioning pressure plate 803 through the self-centering oil cylinder 1200 to push and clamp the workpiece, the small head positioning device 700, the small head positioning and moving the upper plate 701 moves the upper plate T-nut 702 through the small head positioning The connection with the rotatable bridge plate 600 realizes the adjustment of connecting rods with different center distances. The small head positioning base 703 is fixed on the small head positioning moving upper plate 701 by threads, and the small head positioning V-shaped and end face positioning blocks 704 are fixed by screws. On the small head positioning base 703, the small head pressing device 1000 is fixed on the small head positioning and moving upper plate 701 by threads, and a large head positioning device 800 and a small head positioning device 70 corresponding to a workpiece such as an engine connecting rod are passed through. 0 for positioning, and then use the big end clamping device 900 and the small end clamping device 1000 to clamp the two ends of the big end and the small end of the engine connecting rod for clamping, and then the big end hole and the small end hole of the engine connecting rod can be drilled. , boring, and front and back chamfering processes, when the four-axis is rotated by 90 degrees, the disc brake tailstock is fixed and then the reverse side of the engine connecting rod is milled. After the processing is completed, after the disc brake tailstock is released, rotate When the shaft rotates to 270 degrees, after the disc brake tailstock is fixed, it can also drill and tap the pressure bearing surface, drilling bolt through holes and bolt holes on the engine connecting rod.

In this embodiment, as shown in FIGS. 5 and 6 , the large head clamping device 900 includes a bidirectional clamping member 901 and a unidirectional clamping member 902 that are driven by an oil cylinder to clamp the workpiece, and the adjacent workpieces are clamped in both directions through the bidirectional clamping. The workpiece 901 is clamped, and the workpiece at both ends is clamped by the one-way clamp 902 to clamp the big end of the connecting rod of the engine. The bidirectional clamping member 1002, the adjacent workpieces are clamped by the left bidirectional clamping member 1001 and the right bidirectional clamping member 1002 to clamp the small end of the connecting rod of the engine, the structure is simple, the operation is easy, and the clamping effect is good.

As shown in FIG. 7 , the bidirectional clamping member 901 includes a clamping block 1 903 , a support column 1 904 supporting the clamping block 1 903 and an oil cylinder 905 for clamping and adjusting the steering of the clamping block 1 903 . The clamping block 1 903 includes a clamping part 1 9031 and clamping part 2 9032 arranged symmetrically, and a connecting part 1 9033 connected with the upper end of the support column 1 904. The clamping part 1 9031, clamping part 2 9032 and The connecting part 1 9033 has an integrated structure, the lower end of the connecting part 9033 is provided with a shaft hole 9034, and the upper end of the support column 1 904 is provided with a shaft hole 2 9041 which is matched with the shaft hole 1 9034. A movable pin 906 connecting the clamping block 1 903 and the supporting column 1 904 is installed on the 9034 and the second shaft hole 9041, and the clamping block 1 903 takes the movable pin 1 906 as the axis to surround the supporting column 1 904 is rotated to achieve clamping and unclamping of the workpiece.

As shown in FIG. 8, the one-way clamping member 902 includes a second clamping block 907, a second supporting column 908 supporting the second clamping block 907, and a second oil cylinder 909 for clamping and adjusting the steering of the second clamping block 907, The second clamping block 907 includes a third clamping part 9071, a supporting part 9072, and a second connecting part 9073 connected to the upper end of the second supporting column 908. The third clamping part 9071, the supporting part 9072 and the second connecting part 9073 are integrated into one structure. , the lower end of the connecting part 2 9073 is provided with a shaft hole 9074, the upper end of the support column 2 908 is provided with a shaft hole 4 9081 matched with the shaft hole 3 9074, on the shaft hole 3 9074 and the shaft hole 4 9081 Install the second movable pin 910 connecting the second clamping block 907 and the second supporting column 908. The second clamping block 907 takes the second movable pin 910 as the axis to rotate around the second supporting column 908 to realize the clamping of the workpiece. Clamping and loosening, in order to match the support balance of the second support column 908, the support plate 600 is also provided with a support column 1 904 that supports the support portion 9072 on the second clamping block 907 to further improve the one-way clamp. The clamping force of the tightening member 902 to clamp the workpiece engine connecting rod, and because the model of the workpiece engine connecting rod processed each time is different, the upper end of the corresponding support column 904 can be replaced by adding or reducing gaskets such as nuts or other gaskets. The pads are used to match the processing of engine connecting rods of different specifications and models.

When clamping, the workpieces at both ends of the outer side are clamped by the one-way clamps 902 respectively, and the workpieces at both ends are clamped on the outside by the clamping part 9071 of the one-way clamps 902. Due to the balance and clamping force of the clamping member 902, the column-1 904 is supported at the lower end of the supporting portion 9072 to carry the clamping force and clamp the workpiece better; The second clamping part 9032 can simultaneously clamp the ends of the adjacent workpieces, which makes the structure compact, greatly saves the installation space, and has a good clamping effect; The two-way clamping member 901 is provided with driving force by the oil cylinder 905 to realize the clamping and unclamping of the workpiece, without manual clamping, which greatly improves the work efficiency, and the clamping effect is good. Better preparation for machining workpieces. When the workpiece is clamped, the second clamping block 907 is driven to clamp the end of the workpiece. After the workpiece is processed, the second clamping block 907 is driven by the oil cylinder 2 909 to take the movable pin 2 910 as the axis to surround the support column. The second rotation is 90 degrees, the clamping block 2907 leaves the end of the workpiece, and then loosens the workpiece, and the processed workpiece can be removed, and so on, to realize batch processing of the workpiece. When the workpiece is clamped, the clamping block 1 903 is driven to clamp the ends of the two connected workpieces relative to each other. When the processing is completed, the clamping block 1 903 is driven by the oil cylinder 1 905 to surround the support with the movable pin 1 906 as the axis. The second column rotates 90 degrees, the clamping block 1 903 leaves the end of the workpiece, and then loosens the workpiece, and the processed workpiece can be removed. Repeatedly, the batch processing of the workpiece is realized. 90 degrees, making the workpiece loading and unloading convenient and greatly improved.

In this embodiment, in order to adapt to the processing of engine connecting rods of different specifications and models, corresponding to the clamping part 1 9031, clamping part 2 9032 and clamping part 3 9071 are respectively provided with large head pressing blocks 912, according to the engine For the processing of the connecting rod, the clamping action of the first clamping part 9031, the second clamping part 9032 and the third clamping part 9071 on the connecting rod of the workpiece engine can be adjusted by adding or reducing the large end pressure block 912. In this embodiment, the large end The pressure block 612 is movably arranged on the first clamping part 9031, the second clamping part 9032 and the third clamping part 9071, and the large pressure block 912 is clamped from the first clamping part 9031, the clamping part 9031, the clamping part 3 9071 through the fasteners. Part two 9032 and clamping part three 9071 are disassembled or installed. When processing workpieces of different sizes and models, due to the different thicknesses of the workpiece connecting rods, the two-way clamping piece 901 and the one-way clamping piece can be adjusted by the large head pressing block 912 according to the different thicknesses of the connecting rods for the clamping parts. The relative position of 902 and the connecting rod, and then the workpiece is clamped, and the large head pressing block 912 is used to match the processing of different types of connecting rods. The structure is simple and the flexibility is good. It can be applied to the processing of various connecting rods with similar structures, which greatly saves It reduces the development time and production cost of the fixture.

In this embodiment, as shown in FIG. 6 , in the small head positioning device 700, the small head positioning and moving the upper plate 701 is connected with the rotatable bridge plate 600 through the small head positioning and moving the upper plate T-nut 702 to realize different centers To adjust the distance between the connecting rods, the small head positioning base 703 is fixed on the small head positioning moving upper plate 701 by threads, the small head positioning V-shaped and the end face positioning block 704 are fixed on the small head positioning base 703 by threads, and the small head is pressed The tightening device 1000 is fixed on the small head positioning and moving upper plate 701 by threads, and the overall mechanism adjusts the distance of the overall mechanism by tightening the fixing of the bolts on the countersunk head of the small head positioning and moving upper plate 701 and the positioning T-nut 702 to achieve different centers The installation and clamping of the connecting rod from the engine, and the processing of other connecting rods of different types can be adjusted in such a similar way. The flexibility is good, and it can be applied to the processing of a variety of connecting rods with similar structures, which greatly saves the development time and production of the fixture. cost.

In this embodiment, the outer shape of the small head is positioned as an inverted tapered fixed V shape, the positioning device for the large head is a self-centering and centring mechanism, which plays the role of positioning and supporting the workpiece, and the self-centering and centring mechanism of the large head can also prevent The workpiece rotates for better positioning of the workpiece linkage.

As shown in FIG. 1 , it also includes a rotating four-axis (purchased standard part) used to support the support base plate 100 and fixed on the four-axis backing plate 200 in parallel with the bottom plate 100 , and a disc brake tail fixed on the tail seat backing plate 300 Seat (purchased standard parts), the four-axis connecting plate 400 is fixed on the rotating four-axis, the tailstock connecting plate 500 is fixed on the disc brake tailstock, and the rotatable bridge fixed with the four-axis connecting plate 400 and the tailstock connecting plate 500 On the plate 600, it plays a reinforcing role, improves the firmness of the fixture, and further improves the stability of the workpiece processing.

At the end of the description: it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

In a word, the above are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Claims (10)

1. a processing engine connecting rod comprehensive process fixture, including the rotating four-axis (1) and the disc brake tailstock (2) that cooperate with the fixture, it is characterized in that: also comprise a base plate (100), a four-axis backing plate ( 200), tailstock backing plate (300), four-axis connecting plate (400), tailstock connecting plate (500), rotatable bridge plate (600), small end positioning device (700), large end positioning device (800) and The big head clamping device (900), the four rotating shafts (1) are arranged on the bottom plate (100) and the parallel bottom plate (100) is fixed on the four-axis backing plate (200); the said disc brake tailstock is fixed on the tailstock backing plate (300); the four-axis connecting plate (400) is fixed on the rotating four-axis (1), and the tailstock connecting plate (500) is fixed on the disc brake tailstock (2); The rotatable bridge plate (600) is fixed with the four-axis connecting plate (400) and the tailstock connecting plate (500); a plurality of large head positioning devices (800) in rows are fixedly arranged on the rotatable bridge plate (600); Several rows of small head positioning devices (700) are movably arranged on the rotatable bridge plate (600); the large head clamping device (900) is arranged on the rotatable bridge plate (600) for clamping the workpiece . 2. The comprehensive process fixture for processing engine connecting rods according to claim 1, characterized in that: the large head positioning device (800) comprises a large head positioning device base (801) for positioning the large head shape in the center, a large head end face pushing and positioning The large head positioning end face block (802) and the large head pushing positioning pressure plate (803) supporting the positioning of the end face of the connecting rod; the large head positioning device base (801) supports the large head end face of the connecting rod; the small head positioning device (700) includes a small head positioning device (700) Head positioning moving upper plate (701), small head positioning moving upper plate T-nut (702), small head shape positioning and small head positioning V-shaped and end face positioning block (704) for the small head shape positioning and supporting link A small head positioning base (703) and a small head clamping device (1000) on the small head end face of the rod. 3. The comprehensive process fixture for processing engine connecting rods according to claim 2, characterized in that: the big end clamping device (900) comprises a bidirectional clamping member (901) and a unidirectional clamping member (902), adjacent to each other. The workpiece is clamped by the two-way clamps (901), and the outer side of the workpiece at both ends is clamped by the one-way clamps (902) to clamp the large end of the workpiece; the small end clamping device (1000) includes a left two-way clamp (1001) and the right bidirectional clamping piece (1002), the adjacent workpieces are clamped by the left bidirectional clamping piece (1001) and the right bidirectional clamping piece (1002). 4. The comprehensive process fixture for processing engine connecting rods according to claim 3, characterized in that: the two-way clamping member (901) comprises a clamping block 1 (9030) and a support column supporting the clamping block 1 (9032). One (904) and an oil cylinder (905) for clamping and adjusting the steering of a clamping block one (903), the clamping block one (903) including a symmetrically arranged clamping part one (9031) and a clamping Part two (9032) and connecting part one (9033) connected to the upper end of the support column one (904), the clamping part one (9031), clamping part two (9032) and connecting part one (9033) are integrated in structure , the lower end of the connecting part 1 (9033) is provided with a shaft hole 1 (9034), and the upper end of the support column 1 (904) is provided with a shaft hole 2 (9041) matching with the shaft hole 1 (9034). A movable pin (906) connecting the clamping block 1 (903) and the support column 1 (904) is installed on the shaft hole 1 (9034) and the shaft hole 2 (9041). The clamping block 1 (903) The first movable pin (906) is used as the axis to rotate around the first support column (904) to realize the clamping and loosening of the workpiece. 5. The comprehensive process fixture for processing engine connecting rods according to claim 4, wherein the one-way clamping member (902) comprises a second clamping block (907) and a support for supporting the second clamping block (907). The second column (908) and the second cylinder (909) for clamping and adjusting the steering of the second clamping block (907), the second clamping block (907) including the third clamping part (9071) and the supporting part (9072) And the connecting part two (9073) connected with the upper end of the supporting column two (908), the clamping part three (9071), the supporting part (9072) and the connecting part two (9073) are integrated structure, the connecting part two (9073) 9073) The lower end is provided with a shaft hole three (9074), the upper end of the support column two (908) is provided with a shaft hole four (9081) matching with the shaft hole three (9074), and the shaft hole three (9074) and The second movable pin (910) connecting the second clamping block (907) and the second supporting column (908) is installed on the shaft hole 4 (9081). 910) is that the shaft rotates around the second support column (908) to realize the clamping and loosening of the workpiece. 6. The comprehensive process jig for processing engine connecting rods according to claim 5, wherein the rotatable bridge plate (600) is provided with a support portion (9072) for supporting the second clamping block (907). Support column one (904). 7. The comprehensive process fixture for processing engine connecting rods according to claim 5, characterized in that: the first clamping part (9031), the second clamping part (9032) and the third clamping part (9071) are respectively provided with Large head clamp (912). 8. The comprehensive process fixture for processing engine connecting rods according to claim 2, characterized in that: said bulkhead positioning device (800) locates the outline of the workpiece bulkhead blank in the middle, and the bulkhead positioning device base (801) is fixed on the rotatable bridge On the plate (600), the bulkhead positioning end face block (802) is fixed on the bulkhead positioning device base (801), the bulkhead pushing and positioning pressure plate (803) is fixed on the drive shaft (804) through the hole, and the drive shaft (804) is fixed on the bulkhead On the hole of the positioning device base (801), the left sub-middle pressure plate (805) is fixed on the sub-center transmission shaft (806) through the hole, and the sub-center transmission shaft (806) is fixed on the large head positioning device base (801) through the hole, The right sub-center pressure plate (807) is fixed on the sub-center drive shaft (806) through the hole, the sub-center drive shaft (806) is fixed on the base (801) of the bulkhead positioning device through the hole, and the left sub-center pressure plate (805), The right centring pressure plate (807) realizes automatic centring and clamping of the workpiece through the self-centering oil cylinder (1200), and the push-pull positioning plate (803) pushes and clamps the workpiece through the self-centering oil cylinder (1200). 9. The comprehensive process fixture for processing engine connecting rods according to claim 2, characterized in that: in the small head positioning device (700), the small head positioning and moving the upper plate (701) moves the upper plate T-shaped by the small head positioning The connection between the nut (702) and the rotatable bridge plate (600) realizes the adjustment of connecting rods with different center distances, and the small head positioning base (703) is fixed on the small head positioning and moving upper plate (701) through threads, and the small head positioning The V-shaped and end face positioning blocks (704) are fixed on the small head positioning base (703) by threads, the small head V-shaped and end face positioning blocks (704) locate the workpiece small head shape blank, and the small head pressing device (1000) passes through The thread is fixed on the small head positioning moving upper plate (701). 10. The comprehensive process fixture for processing engine connecting rods according to claim 1, wherein the four-axis connecting plate (400) and the tailstock connecting plate (500) are used to support the rotatable bridge plate (600). ), one side of the four-axis connecting plate (400) is connected to the rotatable bridge plate (600), one side is fixed on the rotating four-axis (1), and one side of the tailstock connecting plate (500) is connected to the rotatable bridge plate (600). On the rotating bridge plate (600), one side is fixed on the disc brake tailstock (2).

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