Positioning elastic tool for rack grinding and milling machining

Abstract

The utility model discloses an elastic positioning tool for grinding and milling a rack, which comprises an elastic positioning part, the elastic positioning part comprises a fixed limiting component, an elastic limiting component and a first pressing block, and the fixed limiting component and the elastic limiting component are arranged corresponding to the first pressing block; limiting teeth are arranged on a fixed block of the fixed limiting assembly and an elastic block of the elastic limiting assembly, the elastic block is movably arranged on the elastic positioning part through an elastic piece, the fixed blocks are fixedly arranged on the elastic positioning part, the fixed blocks are arranged on the two sides of the elastic block, and the limiting teeth correspond to a tooth area of the rack; the fixing blocks and the elastic blocks are arranged to form a plurality of clamping and fixing points for the tooth area, the elastic blocks in the center of the tooth area can float up and down to adjust the position of the elastic blocks on the basis of the elastic action of the elastic pieces when coping with a rack in a bent state, the elastic blocks are perfectly attached to the tooth area under the elastic action, the clamping and positioning effects are good, and the service life of the rack is prolonged. And moreover, the precise tooth profile is not damaged, and batch production can be realized.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts production, in particular to a positioning elastic tooling for rack grinding and milling. Background Art

[0002] CNC machine tools are short for computer digitally controlled machine tools. They are high-precision, high-efficiency automated machine tools equipped with program control systems. The processing program sheet is written according to the instruction code and program format specified by the CNC machine tool, and the contents of the program sheet are recorded in the memory (such as RAM, disk), and then input into the CNC device of the CNC machine tool to automatically perform precision processing on the processed parts, thereby commanding the machine tool to process the parts. When processing parts, CNC lathes use a large number of fixtures to assist in positioning and processing the workpiece.

[0003] When grinding or milling a rack through a CNC machine tool, since the rack has a certain curvature after forging, the existing positioning tooling for CNC machine tool processing is mostly designed based on design drawings rather than the actual rack shape, that is, it is impossible to perform targeted positioning and fixing based on the rack in the bent state after forging. This makes the positioning of the rack by the tooling unstable, which can easily cause deviations in the size of the workpiece after processing. At the same time, since the rack and the tooling in the bent state cannot fit perfectly, the tooth shape of the rack is easily damaged during the machining process, resulting in batch scrapping, and it is not suitable for precision machined parts such as racks.

[0004] In view of the above-mentioned defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the above-mentioned technical defects, the technical solution adopted by the utility model is to provide a positioning elastic tooling for rack grinding and milling, including an elastic positioning part and a fixed base, the elastic positioning part is arranged on the fixed base, the elastic positioning part includes a fixed limiting component, an elastic limiting component and a first pressing block, the fixed limiting component and the elastic limiting component are both arranged below the first pressing block, the fixed limiting component is arranged on both sides of the elastic limiting component, the fixed limiting component includes a fixed block, the elastic limiting component includes an elastic member and an elastic block, limiting teeth are arranged on the fixed block and the elastic block, the elastic block is movably arranged on the elastic positioning part through the elastic member, the fixed block is fixedly arranged on the elastic positioning part, the rack is simultaneously arranged between the fixed limiting component and the first pressing block and between the elastic limiting component and the first pressing block, and the limiting teeth and the tooth area of ​​the rack are arranged correspondingly.

[0006] Preferably, the elastic limit assembly also includes a mounting seat, an adjustment hole is provided in the mounting seat, the lower end of the elastic block is arranged in the adjustment hole, and the elastic block can move linearly along the adjustment hole, the elastic member includes an adjusting spring and a connecting screw, a limiting boss is provided at the lower part of the adjusting hole, and the nail head of the connecting screw is clamped with the limiting boss, and the other end is threadedly connected to the elastic block, the adjusting spring is arranged in the adjusting hole and sleeved on the connecting screw, and the two ends of the adjusting spring are respectively contacted with the elastic block and the mounting seat to provide elastic force.

[0007] Preferably, the positioning elastic tooling for rack grinding and milling also includes a fixed clamping portion, which is arranged on the fixed base, and the fixed clamping portion includes a second pressing block and a support seat, the second pressing block is arranged above the support seat, and the end of the rack is arranged between the second pressing block and the support seat.

[0008] Preferably, the positioning elastic tooling for rack grinding and milling includes a first adjustment platform, a second adjustment platform and a third adjustment platform, the first adjustment platform, the second adjustment platform and the third adjustment platform are all arranged on the fixed base, the first adjustment platform is provided with a fixed limit assembly and the first holding block, the second adjustment platform is provided with a fixed limit assembly and an elastic limit assembly, the third adjustment platform is provided with the fixed clamping part, and the second adjustment platform is provided between the first adjustment platform and the third adjustment platform.

[0009] Preferably, an adjustment groove is provided on the fixed base, a slider is movably connected in the adjustment groove, the first adjustment platform, the second adjustment platform and the third adjustment platform are respectively connected to the corresponding sliders, so that the first adjustment platform, the second adjustment platform and the third adjustment platform can move linearly along the adjustment groove, and a locking piece is provided on the slider, which is used to fix the position of the slider in the adjustment groove.

[0010] Preferably, a supporting fixing plate is provided on the first adjustment platform, a first contact block is provided on the supporting fixing plate, the first contact block is arranged below the first holding block, the rack is arranged between the first contact block and the first holding block, and the fixed limiting assembly on the first adjustment platform is arranged on a side of the first contact block close to the second adjustment platform.

[0011] Preferably, two second contact blocks are arranged on the first holding block, one of the second contact blocks is arranged corresponding to the first contact block, and the other of the second contact blocks is arranged corresponding to the elastic block.

[0012] Preferably, two third contact blocks are arranged on the second holding block, two fourth contact blocks are arranged on the support seat, the third contact blocks and the fourth contact blocks are arranged in one-to-one correspondence, and the rack is arranged between the third contact blocks and the fourth contact blocks.

[0013] Preferably, the first contact block, the second contact block, the third contact block and the fourth contact block are all provided with a clamping groove, and the cross section of the clamping groove is set to be an arc shape.

[0014] Preferably, both the first adjustment platform and the third adjustment platform are provided with a starting member, and the starting member is connected to the corresponding first holding block or the second holding block to realize the pressing operation of the first holding block or the second holding block.

[0015] Compared with the prior art, the beneficial effect of the utility model is that: the utility model forms at least three clamping and fixing points on the tooth area of ​​the rack by setting the fixed block and the elastic block, and sets the elastic block at the center position of the tooth area, so that when dealing with a rack in a bent state, the elastic block can float up and down to adjust its own position based on the elastic action of the elastic part, and fit perfectly with the tooth area under the action of the elastic force, with good clamping and positioning effect, and ensures that the precise tooth shape is not damaged, and mass production can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural view of a positioning elastic tooling used for rack grinding and milling;

[0017] Figure 2 It is a structural front view of a positioning elastic tooling used for rack grinding and milling;

[0018] Figure 3 is a structural cross-sectional view of the elastic limiting component;

[0019] Figure 4 It is a structural cross-sectional view of the elastic positioning portion.

[0020] The numbers in the figure represent:

[0021] 1-elastic positioning part; 2-fixed base; 3-fixed clamping part; 4-tooth rack; 5-first adjustment platform; 6-second adjustment platform; 7-third adjustment platform; 8-starting piece; 11-fixed limiting assembly; 12-elastic limiting assembly; 13-first holding block; 14-limiting tooth; 21-adjusting groove; 31-second holding block; 32-support seat; 51-support fixing plate; 121-elastic block; 122-mounting seat; 123-adjusting spring; 124-connecting screw; 131-second contact block; 311-third contact block; 321-fourth contact block; 511-first contact block. DETAILED DESCRIPTION

[0022] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] like Figure 1 , Figure 2 As shown, Figure 1 A three-dimensional structural view of a positioning elastic tooling used for rack grinding and milling; Figure 2 This is a structural front view of the positioning elastic tooling used for rack grinding and milling.

[0025] The utility model discloses a positioning elastic tooling for rack grinding and milling, comprising an elastic positioning part 1 and a fixed base 2, wherein the elastic positioning part 1 is arranged on the fixed base 2, wherein the elastic positioning part 1 comprises a fixed limiting component 11, an elastic limiting component 12 and a first holding block 13, wherein the fixed limiting component 11 and the elastic limiting component 12 are both arranged below the first holding block 13, wherein the two fixed limiting components 11 are respectively arranged on both sides of the elastic limiting component 12, wherein the fixed limiting component 11 comprises a fixed block, wherein the elastic limiting component 12 comprises an elastic member and an elastic block 121, wherein the fixed block A limiting tooth 14 is provided on the elastic block 121, the elastic block 121 is movably provided on the elastic positioning part 1 through the elastic member, the fixed block is fixedly provided on the elastic positioning part 1, the rack 4 is provided between the fixed limiting component 11 and the first pressing block 13 and between the elastic limiting component 12 and the first pressing block 13, the limiting tooth 14 and the tooth area of ​​the rack 4 are provided correspondingly, and the tooth area is meshed with the fixed limiting tooth 14 and the elastic limiting tooth 14, so as to ensure the fixing effect of the elastic positioning part 1 on the rack 4.

[0026] By setting the elastic member, the elastic adjustment of the elastic block 121 in the radial direction of the rack 4 can be realized. When the rack 4 is in a bent state, the fixed blocks on both sides of the elastic block 121 are firstly positioned at two points corresponding to the tooth area. Then, under the action of the elastic member, the elastic block 121 is fitted with the rack 4 at the center position of the arc between the two-point positioning, thereby performing three-point positioning on the tooth area to ensure the fixing effect of the rack 4.

[0027] Preferably, the elastic limiting assembly 12 also includes a mounting seat 122, an adjustment hole is provided in the mounting seat 122, the lower end of the elastic block 121 is arranged in the adjustment hole, and the elastic block 121 can move linearly along the adjustment hole, the elastic member includes an adjusting spring 123 and a connecting screw 124, a limiting boss is provided at the lower portion of the adjustment hole, and the nail head of the connecting screw 124 is clamped with the limiting boss, and the other end is threadedly connected to the elastic block 121, the adjusting spring 123 is arranged in the adjusting hole and sleeved on the connecting screw 124, and the two ends of the adjusting spring 123 are respectively contacted with the elastic block 121 and the mounting seat 122 to provide elastic force.

[0028] In a specific embodiment, the limiting tooth 14 is made of 45 steel with hardness tempered to HRC30-35. The tooth width of the limiting tooth 14 is 4 mm narrower than the two sides of the rack 4, so that it is easier for the limiting tooth 14 to fit perfectly with the rack 4. The adjusting spring 123 is a spring with an outer diameter of 15 mm, an inner diameter of 12 mm, and a height of 10 mm. The connecting screw 124 is connected with an M10 screw, and the elastic sliding stroke of the elastic block 121 is 2 mm.

[0029] The maximum height of the elastic block 121 can be limited by the engagement of the nail head of the connecting screw 124 with the limiting boss. When the rack 4 is in a bent state, under the downward pressure of the first holding block 13 and the upward elastic force of the elastic block 121, the elastic block 121 can be made to fit and apply force to the rack 4 to achieve a better clamping and positioning effect.

[0030] Preferably, the positioning elastic tooling for rack grinding and milling also includes a fixed clamping part 3, which is arranged on the fixed base 2, and the fixed clamping part 3 includes a second pressing block 31 and a support seat 32, the second pressing block 31 is arranged above the support seat 32, and the end of the rack 4 is arranged between the second pressing block 31 and the support seat 32. The end of the rack 4 is fixed by the fixed clamping part 3 to ensure the stability of the rack 4 during the processing.

[0031] Generally, the first pressing block 13 and the second pressing block 31 are both pressed down and fixed by a hydraulic cylinder or a pneumatic cylinder.

[0032] The fixing blocks are provided at both ends of the tooth area, and the limiting teeth 14 on the fixing blocks at both ends of the tooth area correspond to the tooth shape of the tooth area, so that a certain degree of error prevention can be achieved. If the wrong teeth of the rack 4 are placed, they will lift up or fall off, effectively preventing errors from occurring.

[0033] The specific processing steps of the utility model are as follows: first, the tooth area of ​​the rack 4 faces downward, the two fixed blocks correspond to the two ends of the tooth area respectively, and the limit teeth 14 on the two fixed blocks are meshed and connected with the tooth area, the middle part of the tooth area is supported by the elastic block 121, and the oil cylinder pushes the oil cylinder telescopic rod to press down with the second holding block 31 by starting the equipment, and the end of the rack 4 is clamped and fixed by the second holding block 31 and the support seat 32, and then, the oil cylinder pushes the oil cylinder telescopic rod to press down with the first holding block 13, and presses down to the set pressure, so that the limit teeth 14 on the fixed block and the elastic block 121 are perfectly fitted with the tooth area, and then milling or grinding processing operations are performed, and after completion, return to the original position, pick up the workpiece, and repeat the above actions for continuous processing.

[0034] The utility model forms at least three clamping and fixing points on the tooth area of ​​the rack 4 by setting the fixing block and the elastic block 121, and sets the elastic block 121 at the center position of the tooth area, so that when dealing with the rack 4 in a bent state, the elastic block 121 can float up and down to adjust its own position based on the elastic action of the elastic member, and fit perfectly with the tooth area under the action of the elastic force, so that the clamping and positioning effect is good, and the precise tooth shape is ensured not to be damaged, and mass production can be realized.

[0035] Embodiment 2

[0036] The positioning elastic tooling for rack grinding and milling includes a first adjustment platform 5, a second adjustment platform 6 and a third adjustment platform 7. The fixed base 2 is provided with an adjustment groove 21, and a slider is movably connected in the adjustment groove 21. The first adjustment platform 5, the second adjustment platform 6 and the third adjustment platform 7 are respectively connected to the corresponding sliders, so that the first adjustment platform 5, the second adjustment platform 6 and the third adjustment platform 7 can move linearly along the adjustment groove 21. The slider is provided with a locking piece, so as to fix the position of the slider in the adjustment groove 21. The first adjustment platform 5 is provided with a fixed limiting component 11 and the first holding block 13, the second adjustment platform 6 is provided with a fixed limiting component 11 and an elastic limiting component 12, the third adjustment platform 7 is provided with the fixed clamping part 3, and the second adjustment platform 6 is arranged between the first adjustment platform 5 and the third adjustment platform 7. By adjusting the relative positions of the first adjustment platform 5, the second adjustment platform 6 and the third adjustment platform 7, the clamping and fixing of racks 4 with different size structures can be achieved.

[0037] It is worth pointing out that position adjustment can also be achieved by setting different mounting holes and installing the first adjustment platform 5, the second adjustment platform 6 and the third adjustment platform 7 in mounting holes at different positions. The setting of the mounting holes can be suitable for fixing the clamping of several models of racks 4.

[0038] A supporting and fixing plate 51 is provided on the first adjustment platform 5, and a first contact block 511 is provided on the supporting and fixing plate 51. The first contact block 511 is arranged below the first pressing block 13, and the rack 4 is arranged between the first contact block 511 and the first pressing block 13. The fixed limiting component 11 on the first adjustment platform 5 is arranged on the side of the first contact block 511 close to the second adjustment platform 6.

[0039] Two second contact blocks 131 are arranged on the first holding block 13, one of the second contact blocks 131 is arranged corresponding to the first contact block 511 to clamp and fix the end of the rack 4, and the other second contact block 131 is arranged corresponding to the elastic block 121, so that under the downward pressure of the second contact block 131 and the upward elastic force of the elastic block 121, the elastic block 121 is attached to and applies force to the rack 4.

[0040] Two third contact blocks 311 are arranged on the second pressing block 31, and two fourth contact blocks 321 are arranged on the supporting seat 32. The third contact blocks 311 and the fourth contact blocks 321 are arranged in a one-to-one correspondence, and the rack 4 is arranged between the third contact blocks 311 and the fourth contact blocks 321 to achieve a clamping effect.

[0041] The first contact block 511, the second contact block 131, the third contact block 311 and the fourth contact block 321 are all provided with clamping grooves, and the cross-section of the clamping groove is set to be arc-shaped, so that it is easier to fit the outer arc surface of the rack 4, thereby improving the clamping effect of the rack 4.

[0042] The setting of the contact block structure reduces the contact area between the first pressing block 13, the supporting fixing plate 51, the second pressing block 31, the second pressing block 31 and the rack 4, avoids the non-fitting of the curved rack 4 with the large contact surface, and performs a stable clamping operation on the curved rack 4 through multiple clamping points.

[0043] A starting member 8 is provided on both the first adjustment platform 5 and the third adjustment platform 7. The starting member 8 is connected to the corresponding first pressing block 13 or the second pressing block 31 to realize the downward pressing operation of the first pressing block 13 or the second pressing block 31. The starting member 8 is generally a conventional pressure device such as an oil cylinder or a pneumatic cylinder.

[0044] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. A positioning elastic tooling for rack grinding and milling, characterized in that: It includes an elastic positioning part and a fixed base, the elastic positioning part is arranged on the fixed base, the elastic positioning part includes a fixed limiting component, an elastic limiting component and a first holding block, the fixed limiting component and the elastic limiting component are arranged corresponding to the first holding block, the fixed limiting component includes a fixed block, the elastic limiting component includes an elastic piece and an elastic block, both the fixed block and the elastic block are provided with limiting teeth, the elastic block is movably arranged on the elastic positioning part through the elastic piece, the fixed block is fixedly arranged on the elastic positioning part, the fixed blocks are arranged on both sides of the elastic block, the rack is arranged between the fixed limiting component and the first holding block and between the elastic limiting component and the first holding block, and the limiting teeth and the tooth area of ​​the rack are arranged correspondingly.

2. The positioning elastic tooling for rack grinding and milling as claimed in claim 1, characterized in that: The elastic limiting assembly also includes a mounting seat, an adjusting hole is arranged in the mounting seat, the lower end of the elastic block is arranged in the adjusting hole, and the elastic block can move linearly along the adjusting hole, the elastic member includes an adjusting spring and a connecting screw, a limiting boss is arranged at the lower part of the adjusting hole, and the nail head of the connecting screw is clamped with the limiting boss, and the other end is threadedly connected with the elastic block, the adjusting spring is arranged in the adjusting hole and sleeved on the connecting screw, and the two ends of the adjusting spring are respectively contacted with the elastic block and the mounting seat to provide elastic force.

3. The positioning elastic tooling for rack grinding and milling as claimed in claim 1, characterized in that: The positioning elastic tooling for rack grinding and milling also includes a fixed clamping part, which is arranged on the fixed base. The fixed clamping part includes a second pressing block and a support seat, the second pressing block is arranged above the support seat, and the end of the rack is arranged between the second pressing block and the support seat.

4. The positioning elastic tooling for rack grinding and milling as claimed in claim 3, characterized in that: The positioning elastic tooling used for rack grinding and milling includes a first adjustment platform, a second adjustment platform and a third adjustment platform. The first adjustment platform, the second adjustment platform and the third adjustment platform are all arranged on the fixed base. The first adjustment platform is provided with a fixed limiting component and the first holding block, the second adjustment platform is provided with a fixed limiting component and an elastic limiting component, the third adjustment platform is provided with the fixed clamping part, and the second adjustment platform is arranged between the first adjustment platform and the third adjustment platform.

5. The positioning elastic tooling for rack grinding and milling as claimed in claim 4, characterized in that: The fixed base is provided with an adjustment groove, and a slider is movably connected in the adjustment groove. The first adjustment platform, the second adjustment platform and the third adjustment platform are respectively connected to the corresponding sliders, so that the first adjustment platform, the second adjustment platform and the third adjustment platform can move linearly along the adjustment groove. The slider is provided with a locking piece, and the locking piece is used to fix the position of the slider in the adjustment groove.

6. The positioning elastic tooling for rack grinding and milling as claimed in claim 5, characterized in that: A supporting and fixing plate is provided on the first adjustment platform, a first contact block is provided on the supporting and fixing plate, the first contact block is provided below the first holding block, the rack is provided between the first contact block and the first holding block, and the fixed limiting assembly on the first adjustment platform is provided on a side of the first contact block close to the second adjustment platform.

7. The positioning elastic tooling for rack grinding and milling as claimed in claim 6, characterized in that: Two second contact blocks are arranged on the first holding block, one of the second contact blocks is arranged corresponding to the first contact block, and the other of the second contact blocks is arranged corresponding to the elastic block.

8. The positioning elastic tooling for rack grinding and milling as claimed in claim 7, characterized in that: Two third contact blocks are arranged on the second holding block, two fourth contact blocks are arranged on the support seat, the third contact blocks and the fourth contact blocks are arranged in one-to-one correspondence, and the rack is arranged between the third contact blocks and the fourth contact blocks.

9. The positioning elastic tooling for rack grinding and milling as claimed in claim 8, characterized in that: The first contact block, the second contact block, the third contact block and the fourth contact block are all provided with a clamping groove, and the cross section of the clamping groove is set to be an arc shape.

10. The positioning elastic tooling for rack grinding and milling as claimed in claim 9, characterized in that: The first adjustment platform and the third adjustment platform are both provided with a starting member, and the starting member is connected to the corresponding first holding block or the second holding block to realize the pressing operation of the first holding block or the second holding block.

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