CN209830998U - A Semi-fine Boring Hydraulic Fixture - Google Patents

Abstract

The utility model discloses a semi-finish boring hydraulic fixture, which comprises a mounting base, a positioning fixture arranged on the mounting After the connecting rod is positioned, it is automatically placed on the large end positioning block and the small end positioning block for clamping positioning mechanism, the large end pressing mechanism and the small end pressing mechanism for pressing and fixing the two ends of the connecting rod, and the positioning mechanism Including the big-end positioning pin and small-end positioning pin on the mounting seat and the lifting hydraulic cylinder, the two ends of the connecting rod to be processed are positioned by the positioning mechanism and then moved to the large-end positioning block and the small-end positioning block for compression fixed. It can realize the fast mold change function of the fixture, which saves a lot of debugging and mold change time. The automatic program controls the positioning clamping and automatic processing, which reduces the operator's ability requirements and labor intensity. The structure is simple, the process is simple, the labor intensity is low, and the work High efficiency, less labor demand and low production cost.

Description

A Semi-fine Boring Hydraulic Fixture

technical field

The utility model relates to the technical field of tooling fixtures, in particular to a semi-fine boring hydraulic fixture.

Background technique

Advanced processing technology is an important basis to meet engine performance requirements and an effective way to improve the competitiveness of engine products. Connecting rod expansion technology (also known as connecting rod cracking technology) is a new connecting rod manufacturing technology developed and matured in the developed countries of the automobile industry in the 1990s. It is a major change to the traditional connecting rod processing technology and has become It is an important symbol of the development level of a country's engine connecting rod manufacturing industry. The connecting rod is the core part of the diesel engine, and its quality directly affects the overall performance of the diesel engine. rod cover.

At present, among the jigs used in the semi-finish boring process of expanding connecting rods, the jigs used are all one-station vertical fixtures. When used on a special boring machine, only one connecting rod can be processed at a time, and quick mold change cannot be realized. Require.

The current trend of connecting rod processing is to use general-purpose CNC equipment, so the fixture structure needs to be horizontal, and multi-variety and small-batch production is also a development trend. Therefore, it is an inevitable trend to realize quick mold change, which can save a lot of debugging and trial processing inspection time.

Utility model content

In order to solve some or some technical problems existing in the prior art, the utility model provides a semi-finish boring hydraulic fixture, which can realize the fast mold change function of the fixture, save a lot of time for debugging and mold change, and the automatic program controls the positioning clamp Compact and automatic processing reduces the ability requirements and labor intensity of the operator, simple structure, simple process, low labor intensity, high work efficiency, less labor demand, and low production cost.

In order to solve the above-mentioned existing technical problems, the utility model adopts the following scheme:

A hydraulic jig for semi-fine boring, comprising a mounting seat, several positioning fixtures arranged on the mounting seat to clamp and position connecting rods, and a zero point positioning system provided on the mounting seat, the positioning fixture includes The large-end positioning block and the small-end positioning block respectively supporting and fixing the two ends of the connecting rod on the mounting seat are arranged on the mounting seat to position the connecting rod and then automatically placed on the large-end positioning block and the small-end positioning block. The positioning mechanism for clamping on the small end positioning block, the large end pressing mechanism and the small end pressing mechanism respectively arranged on the mounting seat to press and fix the two ends of the connecting rod, the positioning mechanism includes The big-end positioning pin and the small-end positioning pin on the above-mentioned mounting seat, the lifting hydraulic cylinder for automatic lifting control of the large-end positioning pin and the small-end positioning pin, and the two ends of the connecting rod to be processed are positioned by the large-end After the pin and the small end positioning pin are positioned, they are moved to the large end positioning block and the small end positioning block by the lifting hydraulic cylinder to be pressed and fixed.

Further, the big end pressing mechanism includes side corner pressing blocks arranged at both ends, intermediate corner pressing blocks arranged between two adjacent big end positioning blocks, and intermediate corner pressing blocks arranged between the side corner pressing blocks and the middle The corner oil cylinder at the bottom of the corner pressing block, the big end of the connecting rod on the big end positioning block is pressed and fixed or loosened after rotating the side corner pressing block and the middle corner pressing block through the respective corner oil cylinders.

Further, the side corner pressing block includes a side rotating press plate connected to the corner oil cylinder in the middle, and a side pressing rod provided at one end of the side rotating pressing plate. The middle rotating pressure plate on the corner oil cylinder, the middle pressure rods arranged at both ends of the middle rotation pressure plate, and the side pressure rods are arranged in parallel with the middle pressure rods.

Further, the other end of the side rotating pressure plate is provided with a positioning rod, and the mounting seat is provided with two supporting columns, and the top of the supporting columns is provided with an adjustment supporting nail, and the side pressing rod rotates and compresses the connecting rod. At this time, the positioning rod is supported and positioned by the adjusting support nail.

Further, a bridge connecting plate is provided at the bottom of the positioning pin at the large end and the positioning pin at the small end, and the positioning pin at the large end and the positioning pin at the small end are connected to the lifting hydraulic cylinder through the connecting plate at the large end. connect.

Further, the top cross-section of the positioning pin at the large end is diamond-shaped, and the cross-section at the top of the positioning pin at the small end is circular.

Further, the small end pressing mechanism includes a lever hydraulic cylinder provided on the mounting base, a lever pressing plate driven by the lever hydraulic cylinder provided on the mounting base, and a lever pressure plate on the small end positioning block. The small end of the connecting rod is compressed and fixed by the lever pressing plate.

Further, four sets of positioning fixtures are provided on the mounting base, and the mounting base includes a base plate, several support bases arranged on the base plate, and a top plate fixed by the support bases, and the zero point positioning system is located on the The bottom of the top plate, the lifting hydraulic cylinder is located at the bottom of the top plate and the telescopic rod is set downward.

Compared with the prior art, the beneficial effects of the utility model are:

When clamping and fixing the connecting rod, first locate the holes at both ends of the connecting rod through the positioning pin at the large end and the positioning pin at the small end, and then compress the connecting rod through the pressing mechanism at the large end and the pressing mechanism at the small end At the same time, the large end positioning pin and the small end positioning pin are contracted by the lifting hydraulic cylinder, so that the connecting rod is pressed and fixed on the large end positioning block and the small end positioning block. When the large end positioning pin and the small end positioning pin shrink to the connecting rod The lower end can be quickly processed by the machining center, and the large and small head holes of the connecting rod are used to position and process the large and small head holes, and the zero point positioning system is used to realize the fast mold change function of the fixture. After multiple quick changes, the position accuracy reaches 0.005mm, saving It takes a lot of time for debugging and mold change. If the whole line is promoted, one debugging person in the machining center can be reduced. The automatic program controls the positioning and clamping and automatic processing, which reduces the operator's ability requirements and labor intensity. The structure is simple and the process is simple. , low labor intensity, high work efficiency, less labor demand and low production cost.

Description of drawings

Fig. 1 is the perspective view of the state of the utility model clamping connecting rod;

Fig. 2 is a side sectional view of the state of the clamping connecting rod of the present invention;

Fig. 3 is a top view of the state of the clamping connecting rod of the present invention;

In the figure: lever pressure plate 1, lever hydraulic cylinder 2, small end pressing mechanism 3, corner oil cylinder 4, support column 5, adjustment support nail 6, big end pressing mechanism 7, positioning rod 8, small end positioning block 9, Middle pressure rod 10, middle rotation pressure plate 11, middle corner pressure block 12, positioning fixture 13, side pressure rod 14, side rotation pressure plate 15, side corner pressure block 16, top plate 17, mounting seat 18, bottom plate 19, support seat 20, Small end positioning pin 21, zero point positioning system 22, positioning mechanism 23, large end positioning block 24, large end positioning pin 25, bridge connecting plate 26, lifting hydraulic cylinder 27.

Detailed ways

Below, the utility model will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, on the premise of not conflicting, the various embodiments or technical features described below can be combined arbitrarily to form new implementations. example.

As shown in Figures 1 to 3, a semi-fine boring hydraulic fixture includes a mounting seat 18, a number of positioning fixtures 13 arranged on the mounting seat 18 to clamp and position the connecting rod, and a plurality of positioning fixtures 13 arranged on the mounting seat 18. The zero point positioning system 22, the positioning fixture 13 includes a large end positioning block 24 and a small end positioning block 9 that are respectively arranged on the mounting seat 18 to support and fix the two ends of the connecting rod, and are located on the mounting seat 18. After the connecting rod is positioned, the positioning mechanism 23, which is automatically placed on the large end positioning block 24 and the small end positioning block 9 for clamping, is arranged on the mounting seat 18 to compress the two ends of the connecting rod respectively. Fixed large end pressing mechanism 7 and small end pressing mechanism 3, described locating mechanism 23 comprises big end locating pin 25 and small end locating pin 21 that are located on described mount 18, to described big end locating pin 25 and the small end positioning pin 21 carry out the lifting hydraulic cylinder 27 of automatic lifting control, and the two ends of the connecting rod to be processed pass through the described lifting hydraulic cylinder 27 after the positioning of the large end positioning pin 25 and the small end positioning pin 21. Move to said big-end positioning block 24 and small-end positioning block 9 to press and fix.

In the actual operation process, the hydraulic clamp is detachably fixed to the machining center console through the mounting base 18, and is connected to the hydraulic system through the hydraulic pipeline, so that the hydraulic clamp can be automatically controlled directly through the operating system of the machining center. The fixture is directly matched with the machining center for processing. The positioning fixture 13 generally adopts multiple side-by-side forms to improve processing efficiency. The large-end positioning block 24 and the small-end positioning block 9 are generally installed upward on the mounting seat 18. When the connecting rod is to be processed, The large end positioning pin 25 and the small end positioning pin 21 in the positioning mechanism 23 are higher than the large end positioning block 24 and the small end positioning block 9, while the large end pressing mechanism 7 and the small end pressing mechanism 3 are in a loose state, The operator first places the connecting rod on the positioning mechanism 23 and positions the holes at both ends through the large-end positioning pin 25 and the small-end positioning pin 21, and then starts the program to make the large-end pressing mechanism 7 and the small-end pressing mechanism 3 Clamp the connecting rod, and at the same time shrink the big-end positioning pin 25 and the small-end positioning pin 21 through the lifting hydraulic cylinder 27, when the bottom of the connecting rod contacts the large-end positioning block 24 and the small-end positioning block 9 Finally, the big-end pressing mechanism 7 and the small-end pressing mechanism 3 realize the pressing and positioning of the connecting rod, the big-end positioning pin 25 and the small-end positioning pin 21 continue to shrink down to withdraw from the large and small holes, and then pass through the machining center Each connecting rod hole is processed. After the processing is completed, the large end positioning pin 25 and the small end positioning pin 21 are lifted by the lifting hydraulic cylinder 27 again and then contacted with the connecting rod and reset upward. The large end pressing mechanism 7 and The small end pressing mechanism 3 is reset and released, so that the processed connecting rod can be replaced, and the large and small head holes of the connecting rod are used to locate the processing head holes, and the zero point positioning system 22 is used, which can realize the fast mold change function of the fixture, multiple times After the quick change, the position accuracy reaches 0.005mm, which saves a lot of debugging and mold changing time. If the whole line is promoted, it can reduce the number of debugging personnel in the machining center. The automatic program controls the positioning, clamping and automatic processing, which reduces the ability of the operator. Requirements and labor intensity, simple structure, simple process, low labor intensity, high work efficiency, less labor demand, and low production cost.

As a preference, the big end pressing mechanism 7 includes side corner pressing blocks 16 arranged at both ends, intermediate corner pressing blocks 12 arranged between two adjacent big end positioning blocks 24, and middle corner pressing blocks 12 arranged at the side corners. The corner oil cylinder 4 at the bottom of the briquetting block 16 and the middle corner briquetting block 12, the big end of the connecting rod on the big end positioning block 24 rotates the side corner briquetting block 16 and the middle corner ram through the respective corner oil cylinder 4 After the block 12, realize pressing and fixing or loosening.

When the big end of the connecting rod is pressed and fastened by the big end pressing mechanism 7, the two sides of the big end of the connecting rod are clamped and fixed by a combination of side corner pressing block 16 and intermediate corner pressing block 12 or by two middle corners. The combination of the corner pressing block 12 is clamped and fixed, and the side corner pressing block 16 and the middle corner pressing block 12 both adopt the forward and reverse rotation of the corner oil cylinder 4 to realize the clamping and loosening of the big end of the connecting rod. The operating space of the large end of the connecting rod is larger, the replacement is faster, and the operating space of the machining hole will not be affected. At the same time, the two sides are clamped and fixed, and after combining with the positioning block 24 of the large end, the bottom of the large end is realized. And the positioning of at least three directions on the side, while the machining center stretches from top to bottom and moves laterally, the positioning direction is more comprehensive during the processing, and the positioning accuracy is better. When loosening and clamping the big end of the connecting rod, Clamping can be realized only by rotating the side corner press block 16 and middle corner press block 12 through the corner cylinder 4, the clamping efficiency is higher, and the height operation space required by the mold is smaller, especially for multiple positioning fixtures 13 When used in combination, one middle corner pressure block 12 can realize the positioning of one side of the big ends of the two connecting rods, and only one corner oil cylinder 4 is needed, so the production cost is lower.

Further, the side corner pressing block 16 includes a side rotating pressure plate 15 intermediately connected to the corner oil cylinder 4, and a side pressing rod 14 provided at one end of the side rotating pressing plate 15, and the middle turning angle pressing block 12 includes The intermediate rotation pressure plate 11 connected to the corner oil cylinder 4 in the middle, the middle pressure rod 10 arranged at both ends of the middle rotation pressure plate 11 , and the side pressure rod 14 are arranged parallel to the middle pressure rod 10 .

When the outside of the big end of the connecting rod is clamped and fastened by the side corner pressing block 16 and the middle turning angle pressing block 12, the side rotating pressing plate 15 and the middle rotating pressing plate 11 are installed on the rotating shaft of the corner oil cylinder 4 controlled respectively, and the side pressing There is a corner connection between the rod 14 and the side rotation pressure plate 15, and a rotation angle connection between the middle rotation pressure plate 11 and the middle pressure rod 10. The side pressure rod 14 and the middle pressure rod 10 are arranged in parallel, so that the side pressure rod 14 and the middle pressure rod can be realized. 10 When tightening, the tightening center point is at a position of 45° outside the connecting rod, so that the connecting rod can achieve simultaneous lateral positioning in four directions, front, rear, left, and right, and compression of the upper end. The tightening surface is generally composed of a downward pressing plane at the bottom and an inclined or arc-shaped side pressing surface. The side pressing of the big end of the connecting rod is realized through the side pressing surface. Both ends of the middle rotating pressing plate 11 are provided with a The middle pressure rod 10, while realizing the compression of the connecting rod, can also play the role of supporting and balancing each other, so as to prevent the workpiece from loosening due to the cutting force during the machining process.

Further, the other end of the side rotating platen 15 is provided with a positioning rod 8, and the mounting seat 18 is provided with two support columns 5, and the top of the support column 5 is provided with an adjustment support nail 6. When the side pressing rod 14 is rotated to compress the connecting rod, the positioning rod 8 is supported and positioned by the adjusting support nail 6 .

In order to avoid loosening caused by insufficient clamping force of the side rotary press plate 15 during workpiece processing, a positioning rod 8 is formed at the other end of the side rotary press plate 15 in the form of extended length, and a positioning rod 8 is installed on the mounting seat 18. Adjust the support nail 6, when the side pressure rod 14 rotates and compresses the connecting rod, one end of the positioning rod 8 can be supported and positioned by adjusting the support nail 6, so that the stability of the side corner pressing block 16 is better, and the clamping force and compression The force is greater, and the adjustment support nail 6 is fixed on the support column 5 by threaded rotation. According to different situations, the height of the adjustment support nail 6 can also be adjusted, so that the adjustment support nail 6 plays an effective support. It is more convenient for production and installation.

Simultaneously, the bottom of described big-end locating pin 25 and small-end locating pin 21 is provided with a bridging connecting plate 26, and described big-end locating pin 25 and small-end locating pin 21 connect with all through described block bridging connecting plate 26. The lifting hydraulic cylinder 27 is connected.

When the big end locating pin 25 and the small end locating pin 21 are lifted and controlled by the lifting hydraulic cylinder 27, the bottoms of the big end locating pin 25 and the small end locating pin 21 pass through the block bridge connecting plate 26 and the lifting hydraulic cylinder 27. The connection can realize the effect of synchronous up and down movement, so that the positioning accuracy of the connecting rod during the installation process is higher.

Further, the top cross-section of the positioning pin 25 at the large end is diamond-shaped, and the cross-section at the top of the positioning pin 21 at the small end is circular.

During installation, the small end is directly positioned with a stepped cylinder, which can ensure the positioning accuracy of the small end, while the large end uses a cylinder with a diamond-shaped upper cross section for positioning, and the positioning pin 25 at the large end and the large end hole are used for positioning. Two-point positioning, while ensuring high positioning accuracy, the disassembly and assembly are faster and the friction is smaller, especially when both ends are inserted at the same time, the operation is easier.

Further, the small end pressing mechanism 3 includes a lever hydraulic cylinder 2 arranged on the mounting seat 18, and a lever pressing plate 1 arranged on the mounting seat 18 driven by the lever hydraulic cylinder 2. The small end of the connecting rod on the small end positioning block 9 is compressed and fixed by the lever pressing plate 1 .

The small end pressing mechanism 3 presses and fixes it through a lever pressing plate 1, and the pressing end of the lever pressing plate 1 is provided with a groove that matches the pressing of the workpiece, so that it has two pressing positions on the side and the top surface. area, while the other end is connected to the piston rod of the lever hydraulic cylinder 2. During operation, the compression and loosening can be realized only by the expansion and contraction of the piston rod of the lever hydraulic cylinder 2. The operation is simple and the compression force is large. .

Further, four sets of positioning fixtures 13 are provided on the mounting base 18, and the mounting base 18 includes a bottom plate 19, a number of support bases 20 arranged on the base plate 19, a top plate 17 fixed by the support base 20, The zero point positioning system 22 is located at the bottom of the top plate 17, the lifting hydraulic cylinder 27 is located at the bottom of the top plate 17 and the telescopic rod is set downward.

When the positioning fixture 13 is installed by the mounting seat 18, since the machining center is used for processing, the positioning fixture 13 adopts four groups, which is more versatile, and the lifting hydraulic cylinder 27 in the positioning fixture 13 is installed on the bottom of the top plate 17 and Towards the setting, the large end positioning pin 25 and the small end positioning pin 21 pass through the top plate 17 and are connected to the bridge connecting plate 26. In the case of the same height of the hydraulic clamps, the large end positioning pin 25 and the small end positioning pin 21 can be connected together. The length is longer, the stability is better, and the telescopic distance is larger. The overall structure has been changed from a vertical structure to a horizontal structure, and multiple workpieces can be processed at the same time, realizing the purpose of quick fixture change, which can save a lot of debugging and trial processing inspection. Time is more efficient for small batch production, and one or several cylindrical support seats 20 can be selected as zero point positioning in the zero point positioning system 22 .

In the above technical solutions, the zero point positioning system 22 can also be removed separately for practical use.

The above-mentioned embodiments are only preferred embodiments of the present utility model, and cannot be used to limit the scope of protection of the present utility model. The scope of protection required by the utility model.

Claims (8)

1. A semi-finishing hydraulic clamp, characterized in that: comprising a mounting seat, a plurality of positioning fixtures for clamping and positioning the connecting rod on the mounting seat, a zero point positioning system provided on the mounting seat, the The positioning fixture includes a large-end positioning block and a small-end positioning block which are respectively set on the mounting seat to support and fix the two ends of the connecting rod. The positioning mechanism for clamping on the large-end positioning block and the small-end positioning block, the large-end pressing mechanism and the small-end pressing mechanism that are respectively arranged on the mounting seat to press and fix the two ends of the connecting rod, the described The positioning mechanism includes a large-end positioning pin and a small-end positioning pin arranged on the mounting seat, a lifting hydraulic cylinder for automatic lifting control of the large-end positioning pin and small-end positioning pin, and the two ends of the connecting rod to be processed After being positioned by the big-end positioning pin and the small-end positioning pin, it is moved to the big-end positioning block and the small-end positioning block by the lifting hydraulic cylinder to be pressed and fixed. 2. A semi-fine boring hydraulic jig according to claim 1, characterized in that: the big-end pressing mechanism includes side corner pressing blocks arranged at both ends, and two adjacent big-end positioning blocks Between the intermediate corner pressing block, the corner oil cylinder arranged at the bottom of the side corner pressing block and the middle corner pressing block, the big end of the connecting rod on the big end positioning block rotates the side corner through the respective corner oil cylinders After the pressing block and the intermediate corner pressing block are pressed and fixed or loosened. 3. A semi-finishing hydraulic jig according to claim 2, characterized in that: the side corner pressing block includes a side rotating pressing plate connected to the corner oil cylinder in the middle, and is arranged at one end of the side rotating pressing plate The side pressure rod of the middle rotation angle, the middle rotation angle pressure block includes a middle rotation pressure plate connected to the corner oil cylinder in the middle, and middle pressure rods arranged at both ends of the middle rotation pressure plate, and the side pressure rod and the middle pressure rod Parallel setting. 4. A semi-fine boring hydraulic fixture according to claim 3, characterized in that: the other end of the side-rotating platen is provided with a positioning rod, and the mounting seat is provided with two support columns, and the support columns An adjustment support nail is provided at the top of the top, and the positioning rod is supported and positioned by the adjustment support nail when the side pressing rod rotates and compresses the connecting rod. 5. A semi-fine boring hydraulic jig according to any one of claims 1 to 4, characterized in that: a bridge-type connecting plate is provided at the bottom of the positioning pin at the large end and the positioning pin at the small end, and the large-end positioning pin The end positioning pin and the small end positioning pin are connected with the lifting hydraulic cylinder through the bridge type connecting plate. 6 . The semi-fine boring hydraulic jig according to claim 5 , wherein the top cross-section of the positioning pin at the large end is diamond-shaped, and the cross-section at the top of the positioning pin at the small end is circular. 7 . 7. A semi-fine boring hydraulic jig according to any one of claims 1 to 4, characterized in that: the small end pressing mechanism includes a lever hydraulic cylinder on the mounting seat, and a lever hydraulic cylinder on the mounting seat. The lever pressure plate driven by the lever hydraulic cylinder on the mounting seat, the small end of the connecting rod on the small end positioning block is pressed and fixed by the lever pressure plate. 8. A semi-fine boring hydraulic fixture according to claim 7, characterized in that four sets of positioning fixtures are provided on the mounting base, and the mounting base includes a bottom plate and several support seats arranged on the bottom plate . The top plate fixed by the support base, the zero point positioning system is located at the bottom of the top plate, the lifting hydraulic cylinder is located at the bottom of the top plate and the telescopic rod is set downward.