A hydraulic fixture for processing automobile protective support

Abstract

The present invention discloses a hydraulic clamp for a protective support of an automobile, which is positioned by a positioning shaft and a positioning key and is installed on a horizontal machining center. The clamp comprises a clamp body and a built-in hydraulic oil circuit; a positioning shaft installed on the clamp body by interference fit and a positioning key connected by screws, a right-angle surface positioning block and three diamond pins detachably installed on the clamp body, so as to realize the positioning of parts; there are also eight hydraulic floating support cylinders connected to the clamp body by pads, nine hydraulic lever clamping cylinders and four piston-type clamping cylinders, and four corner clamping cylinders installed on the right-angle surface, so as to realize the part clamping function; a pre-positioning block installed on the right-angle positioning surface and another two pre-positioning rods installed on the clamp body, so as to realize the part pre-positioning and mechanical error prevention functions; the left and right parts are symmetrical, and the positioning and clamping mechanisms on the clamp body are arranged symmetrically on the left and right sides, so as to realize the versatility of the clamp body.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic clamps, in particular to a hydraulic clamp used for processing an automobile protective support. Background Art

[0002] In the prior art, the left / right protective bracket-connecting frame and bracket of an automobile are four parts combined into one part through structural optimization, and then connected to the frame through rivets and bolts. The leaf spring is connected to the protective bracket-connecting frame and the ear part of the bracket through pins, which supports and fixes the leaf spring; the towing hook is connected to the protective bracket-connecting frame and the bracket through threads; the bumper is connected to this part through bolts. The quality of the protective bracket-connecting frame and the bracket will directly affect the performance of the leaf spring suspension and the assembly effect of the bumper. It is an important structural part in the automobile chassis system. The workstation process of processing the protective bracket-connecting frame and the bracket was originally processed by a vertical machining center and an ordinary milling machine in a dispersed process. Each process of a product requires a set of fixtures, which requires a lot of fixtures and equipment, and it is time-consuming and labor-intensive to adjust the fixture, resulting in a large cost investment and unstable processing accuracy. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic clamp for processing automobile protective supports to solve the problems existing in the above-mentioned prior art. The hydraulic clamp can improve product precision, reduce clamp investment, and improve tooling adjustment efficiency.

[0004] To achieve the above-mentioned objectives, the present invention provides the following solutions: The present invention provides a hydraulic clamp for processing automobile protective bearings, comprising a clamping body installed on a workbench of a horizontal machining center, two groups of clamp assemblies are symmetrically arranged on the clamping body along the center line of the clamping body, the clamp assembly comprises a right-angle surface positioning block, a fixed positioning pad block, a diamond positioning pin, a floating support cylinder, a lever clamping cylinder, a piston clamping cylinder, an angle clamping cylinder and a pre-positioning block, each component in the clamp assembly is arranged at a corresponding position of the clamping body according to the structure and processing requirements of the protective bracket, the pre-positioning block installed on the clamping body and the right-angle surface positioning block is used to pre-position the protective bearing, the right-angle surface positioning block, the fixed positioning pad block and the diamond positioning pin are used to position the protective bearing, and the floating support cylinder, the lever clamping cylinder, the angle clamping cylinder and the piston clamping cylinder installed on the clamping body through the pad are used to auxiliary support and clamp the protective bearing.

[0005] Preferably, a locating shaft is installed at the bottom center of the clamp body by interference fit, the locating shaft is installed in cooperation with the clamp body via a locating key, and the clamp body is positioned and installed on the workbench of the horizontal machining center via the locating shaft and the locating key.

[0006] Preferably, a diamond-shaped positioning pin is installed on the right-angle surface positioning block by interference fit.

[0007] Preferably, a diamond pin is detachably mounted on the clamp body, and the diamond pin is mounted on a pad on the upper surface of the clamp body.

[0008] Preferably, the floating support cylinder, the lever clamping cylinder and the piston clamping cylinder are all mounted on the clamp body by means of a pad through bolts.

[0009] Preferably, an angle clamping cylinder is provided on the outer side surface of the right-angle surface positioning block.

[0010] Preferably, a piston clamping cylinder is provided on the top of the right-angle surface positioning block, and the piston clamping cylinder is fixed to the right-angle surface positioning block by a pin; an inclined block type piston clamping cylinder is provided on the special-shaped pad, and the special-shaped pad is fixed to the clamp body by bolts.

[0011] Preferably, a built-in oil circuit is provided in the clamp body and is connected with the oil circuits of the floating support cylinder, the lever pressing cylinder and the piston pressing cylinder respectively.

[0012] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0013] The hydraulic clamp for processing automobile protective supports in the present invention is positioned by a positioning shaft and a positioning key, and is installed on a horizontal machining center. It includes a clamp body and a built-in hydraulic oil circuit; a positioning shaft installed on the clamp body by interference fit and a positioning key connected by screws, a right-angle surface positioning block and three diamond pins detachably installed on the clamp body to achieve part positioning; there are also eight hydraulic floating support cylinders and nine hydraulic lever clamping cylinders and four piston-type clamping cylinders connected to the clamp body by pads, and two corner clamping cylinders installed on the right-angle surface to achieve part auxiliary support and clamping functions; a pre-positioning block installed on the right-angle positioning surface and another two pre-positioning rods installed on the clamp body to achieve part pre-positioning and mechanical error prevention functions, the left and right parts are symmetrical, and the positioning and clamping mechanisms on the clamp body are symmetrically arranged on the left and right to achieve the versatility of the clamp body.

[0014] The protective bracket-connecting frame and the bracket hydraulic universal clamp are installed on the horizontal machining center. The left / right protective bracket-connecting frame of the car is symmetrical with the bracket, with slight differences. The weight reduction of the clamp body, the processing technology of the oil circuit, the over-positioning method of the diamond positioning, the matching of various hydraulic cylinders and other optimization designs are set. Then the clamp body, built-in oil circuit, right-angle surface locating block, fixed locating block, diamond locating pin, hydraulic floating support cylinder, hydraulic lever clamping cylinder, hydraulic piston clamping cylinder, hydraulic angle clamping cylinder, pre-positioning block / axis are optimized. A set of clamps is used to realize the processing of multi-process protective bracket-connecting frame and bracket, which reduces the investment in tooling and equipment, improves the equipment utilization rate, has high adjustment efficiency, and has high and stable processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is the front view of the hydraulic fixture used for processing the automobile protective support;

[0017] Figure 2 This is an axonometric view of a hydraulic fixture used for machining automobile fender supports;

[0018] Among them, 1. Clamp body, 2. Built-in oil circuit, 3. Positioning key, 4. Positioning shaft, 5. Diamond positioning pin one, 6. Diamond positioning pin two, 7. Right-angle positioning block, 8. Angle hydraulic cylinder, 9. Hydraulic floating support cylinder one, 10. Hydraulic floating support cylinder two, 11. Hydraulic floating support cylinder three, 12. Hydraulic lever clamping cylinder one, 13. Diamond positioning pin three, 14. Pre-positioning rod one, 15. Hydraulic lever clamping cylinder two, 16. Hydraulic lever clamping cylinder three, 17. Hydraulic lever clamping cylinder four, 18. Fixed positioning block, 19. Pre-positioning rod two, 20. Hydraulic piston clamping cylinder one, 21. Hydraulic floating support cylinder four, 22. Hydraulic piston clamping cylinder two, 23. Hydraulic lever clamping cylinder four, 24. Pre-positioning block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The purpose of the present invention is to provide a hydraulic clamp for processing automobile protective supports to solve the problems existing in the above-mentioned prior art. The hydraulic clamp can improve product processing accuracy, reduce clamp investment, and improve tooling adjustment efficiency.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1-2As shown, the present embodiment provides a hydraulic clamp for machining an automobile protective support, which is installed on a horizontal machining center, including a clamp body 1, a positioning shaft 4 and a positioning key 3 installed on the clamp body 1 by interference fit; a right-angle surface positioning block 7 installed on the clamp body 1 by bolts through a pad, a diamond positioning pin 1 5 and a diamond positioning pin 2 6 installed on the right-angle surface positioning block 7, and a diamond positioning pin 3 13 installed on the clamp body 1 by a pad through bolts; a hydraulic floating support cylinder 1 9, a hydraulic floating support cylinder 2 10, a hydraulic floating support cylinder 3 11, and a hydraulic floating support cylinder 13 installed on the clamp body 1 by a pad through bolts. The floating support cylinder 4 21 is pressed, the hydraulic lever pressing cylinder 1 12, the hydraulic lever pressing cylinder 2 15, the hydraulic lever pressing cylinder 3 16, the hydraulic lever pressing cylinder 4 17, the hydraulic lever pressing cylinder 5 23 are installed on the clamp body 1 by the pad, the hydraulic wedge piston pressing cylinder 1 20 is installed on the clamp body 1 by the pad, the hydraulic piston pressing cylinder 2 22 is inserted into the right angle surface positioning block 7 by the pin and the limit, and the hydraulic angle pressing cylinder 8 is installed on the side of the right angle surface positioning block 7 by bolt connection; the pre-positioning rod 1 14, the pre-positioning rod 2 19, and the pre-positioning block 24 are installed on the clamp body 1 and the right angle surface positioning block 7. Each pressing cylinder has a pressing function, and hydraulic cylinders of different structures are matched mainly according to the requirements of the part structure and processing technology.

[0023] The entire hydraulic universal clamp is installed on the workbench of the horizontal machining center. It is installed on the workbench using the positioning shaft 4 and the positioning key 3 to determine the mechanical position, and then determine the relative position of the processing part coordinate system, programming coordinate system, machine tool and tool. When processing the automobile protection bracket-connecting frame and bracket, according to the left and right structural differences of the product, the pre-positioning rod 14, pre-positioning rod 2 19 installed on the clamp body 1 and the pre-positioning block 24 installed on the right-angle surface positioning block 7 play the role of protecting the hydraulic cylinder and preventing errors according to the position and mark of the pre-positioning rod / block. The fixed positioning block 18 cooperates with the right-angle surface positioning block 7 to constrain the rotation and movement of the part in the Z direction.

[0024] When processing the left part, the first step is to pre-position and locate the part by the right-angle surface positioning block 7, diamond positioning pin 1 5, diamond positioning pin 2 2 6, diamond positioning pin 3 13, and pre-positioning rod 1 14, pre-positioning rod 2 19, and pre-positioning block 24. At the same time, according to the spatial position of pre-positioning rod 1 14, pre-positioning rod 2 19, and pre-positioning block 24 relative to other components and the position and identification of the processed part, the hydraulic cylinder is protected and the error-proofing function of the part is played. The second step is to insert the clamping rod of the piston clamping cylinder 22 and press the clamping button of the equipment. First, the hydraulic lever clamping cylinder 1 12, hydraulic lever clamping cylinder 4 17, hydraulic lever clamping cylinder 5 23, hydraulic piston clamping cylinder 2 22, and hydraulic corner cylinder 8 realize the clamping action, and then the hydraulic floating support cylinder 1 9, hydraulic floating support cylinder 2 10, hydraulic floating support cylinder 3 11, hydraulic floating support cylinder 4 21, hydraulic lever clamping cylinder 2 15, hydraulic lever clamping cylinder 3 16, and hydraulic piston clamping cylinder 1 20 realize auxiliary support and clamping action to complete the clamping of the automobile protective support. The processing positioning and clamping principle of the right part is the same as that of the left part. The positioning and clamping components are arranged in a shared or symmetrical manner to improve the utilization rate of the components, reduce the cost of the fixture, and realize the positioning and clamping functions of the symmetrical parts.

[0025] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0026] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hydraulic fixture for processing automobile protective supports, characterized in that: It includes a clamping body installed on a workbench of a horizontal machining center, two groups of clamping components are symmetrically arranged on the clamping body along the center line of the clamping body, the clamping assembly includes a right-angle surface positioning block, a fixed positioning pad block, a diamond-shaped positioning pin, a floating support cylinder, a lever clamping cylinder, a piston clamping cylinder, an angle clamping cylinder and a pre-positioning block, and each component in the clamping assembly is arranged at a corresponding position on the clamping body according to the structure and processing requirements of the protective support, the pre-positioning block installed on the clamping body and the right-angle surface positioning block is used to pre-position the protective support, the right-angle surface positioning block, the fixed positioning pad block and the diamond-shaped positioning pin are used to position the protective support, and the floating support cylinder, the lever clamping cylinder, the angle clamping cylinder and the piston clamping cylinder installed on the clamping body through the pad are used to assist in supporting and clamping the protective support; A positioning shaft is installed at the center of the bottom of the clamp body by interference fit, and the positioning shaft is installed in cooperation with the clamp body through a positioning key. The clamp body is positioned and installed on the workbench of the horizontal machining center through the positioning shaft and the positioning key; a diamond-shaped positioning pin is installed on the right-angle surface positioning block by interference fit; a diamond-shaped pin is detachably installed on the clamp body, and the diamond-shaped pin is installed on the pad on the upper surface of the clamp body; The outer side surface of the right-angle surface positioning block is provided with an angle clamping cylinder; the top of the right-angle surface positioning block is provided with a piston clamping cylinder, which is fixed to the right-angle surface positioning block by a pin; an inclined block type piston clamping cylinder is provided on the special-shaped pad, and the special-shaped pad is fixed to the clamp body by bolts.

2. The hydraulic clamp for machining automobile protective support according to claim 1, characterized in that: The floating support cylinder, the lever clamping cylinder and the piston clamping cylinder are all mounted on the clamp body by means of a cushion block through bolts.

3. The hydraulic clamp for processing automobile protective support according to claim 1 is characterized in that: The clamp body is provided with built-in oil circuits which are respectively connected with the oil circuits of the floating support cylinder, the lever pressing cylinder and the piston pressing cylinder.

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