Universal adjustable clamp for rough machining of medium-sized casting blanks

Abstract

The general adjustable clamp comprises two clamping units which are arranged in a left-right spaced mode, each clamping unit comprises a base and two clamping mechanisms which are installed on the base in a front-back spaced mode, and each clamping mechanism comprises a jack, a pressing plate and a first side top plate. The installation positions of the jack and the pressing plate on the base are adjustable, the height of the pressing plate is adjustable, the installation position of the first side top plate of one clamping mechanism on the base is adjustable, the first side top plates of the two clamping mechanisms are each provided with a first side top screw, and the left side or the right side of the base of at least one clamping unit is provided with a second side top plate. And a second side top screw is mounted on the second side top plate. The adjustable clamp is simple in structure, low in machining cost, flexible to use, capable of keeping good rigidity, good in universality and reliable in clamping, and on the premise that machining stability is guaranteed, the production efficiency of rough machining of medium-sized casting blanks can be improved, and the labor intensity of workers can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of clamps for casting machining, specifically to a kind of general adjustable clamp for rough machining of medium-sized casting blank. BACKGROUND

[0002] Casting blank needs to be positioned using a clamp during the machining process. Rough machining of casting blank has the characteristics of uneven clamping surface, large cutting amount and large cutting load during the machining process. Since the weight of medium-sized casting blank is limited, it cannot effectively reduce the impact of cutting load, so the clamp as a whole needs to have good rigidity to ensure the stability of the casting blank during the machining process. In addition, due to the uneven clamping surface, the clamp needs to be flexible to achieve high efficiency during the clamping process.

[0003] Under normal circumstances, the multiple requirements for the clamp will lead to the development of the clamp design in the direction of specialization, which continuously reduces the universality of the clamp. When facing small-batch and multi-type part machining conditions, the clamp needs to be frequently replaced, which reduces the utilization rate of the equipment. The flexibility of clamp adjustment is contrary to the universality of the clamp itself, making it difficult to improve the production efficiency of rough machining for such working conditions and reducing the labor intensity of personnel. SUMMARY

[0004] The utility model solves the technical problems of the prior art by providing a general adjustable clamp for rough machining of medium-sized casting blank. The adjustable clamp has a simple structure, low processing cost and flexible use, can maintain good rigidity, has good universality, can reliably clamp the medium-sized casting blank during rough machining, can improve the production efficiency of rough machining of medium-sized casting blank and reduce the labor intensity of personnel under the premise of ensuring machining stability.

[0005] The utility model solves the above technical problems by adopting the following technical scheme: a general adjustable clamp for rough machining of medium-sized casting blank, comprising two clamping units arranged at intervals left and right, each clamping unit comprising a base and two clamping mechanisms installed on the base at intervals front and back, each clamping mechanism comprising a jack, a pressing plate and a first side top plate, the mounting position of the jack and the pressing plate on the base is adjustable, the height of the pressing plate is adjustable, the jack is used to support the medium-sized casting blank to be clamped, the pressing plate is used to press the medium-sized casting blank downward, the mounting position of the first side top plate of one of the clamping mechanisms on the base is adjustable, a first side top screw is installed on the first side top plate of each of the two clamping mechanisms, the first side top screws of the two clamping mechanisms are used to clamp the medium-sized casting blank front and back, a second side top plate is installed on the left side or the right side of the base of at least one of the clamping units, a second side top screw is installed on the second side top plate, and the second side top screw is used to position the end face of the medium-sized casting blank.

[0006] The utility model discloses adjustable clamp supports medium-sized casting blank through the jack, and the medium-sized casting blank is pressed down tightly through the pressing plate, and the first side set screw of two clamping mechanisms is used for clamping the medium-sized casting blank forwards and backwards, and the end surface of the medium-sized casting blank is positioned through the second side set screw, and the mounting position of the jack, the pressing plate and the first side top plate of one clamping mechanism on the base is adjustable, and the height of the pressing plate is adjustable, can realize reliable clamping of medium-sized casting blank during rough machining, can improve the production efficiency of medium-sized casting blank rough machining under the premise of guaranteeing the machining stability, and reduces the labor intensity of personnel.

[0007] The adjustable clamp can keep good rigidity, has good versatility, reliable clamping and is applicable to machining of various medium-sized casting blank parts in a certain size range.

[0008] As preferred, a long hole is formed on the pressing plate, a screw rod is vertically arranged in the long hole, the upper part of the screw rod is locked and fixed to the pressing plate through a nut, the bottom of the screw rod is threadedly connected with a first T-shaped block, one end of the pressing plate is fixed with a guide rod, the guide rod is arranged in parallel with the screw rod, a guide sleeve is sleeved on the outside of the guide rod, the bottom of the guide sleeve is threadedly connected with a second T-shaped block, a T-shaped slot is formed in the upper part of the base and extends forward and backward, and the first T-shaped block and the second T-shaped block are arranged in the T-shaped slot respectively. The T-shaped slot is formed in the base as the mounting reference of the pressing plate and other parts, so that the installation of the pressing plate and the free adjustment of the position of the pressing plate are facilitated.

[0009] As preferred, a supporting seat is fixed to the bottom of the jack, a waist-shaped hole with a notch is arranged on the front side and the rear side of the supporting seat respectively, a locking screw is vertically arranged in the waist-shaped hole, the lower side of the locking screw is threadedly connected with a third T-shaped block, and the third T-shaped block is arranged in the T-shaped slot. The mounting of the jack on the base is realized through the cooperation of the supporting seat, the locking screw and the third T-shaped block, so that the installation is facilitated, and the quick adjustment of the mounting position of the jack on the base can be realized.

[0010] As preferred, the upper portion of the base is provided with a plurality of first threaded holes, a plurality of second threaded holes and a first key groove, the first side top plate of one of the clamping mechanisms is fixed to the base by a plurality of first screws, each of the first screws is installed in one of the first threaded holes, the number of the first threaded holes is greater than the number of the first screws, the bottom of the first side top plate of the other clamping mechanism is provided with a second key groove and the first side top plate is fixed to the base by a plurality of second screws and positioned by a first key block, each of the second screws is installed in one of the second threaded holes, and the first key block is installed in the first key groove and the second key groove. The first side top plate of one of the clamping mechanisms is fixed to the base by a plurality of first screws, as a movable side, the position of the first side top plate on the base can be adjusted by adjusting the positions of the first screws to adapt to the positioning of various parts; the first side top plate of the other clamping mechanism is fixed to the base by a plurality of second screws and a first key block, as a fixed side, the position of the first side top plate on the base cannot be adjusted to meet the preliminary positioning requirements when various parts are clamped.

[0011] As preferred, the base is provided with a plurality of counterbores, the bottom of the base is provided with a third key groove, the base is fixed to the machine tool worktable by a plurality of third screws and positioned by a second key block, each of the third screws is installed in one of the counterbores, and the second key block is installed in the third key groove and a reference T-shaped groove on the machine tool worktable. The installation of the base on the machine tool worktable is realized by the cooperation of the second key block and the third key groove, which can ensure the installation accuracy of the two clamping units and ensure the reliable clamping effect of the parts.

[0012] Compared with the prior art, the adjustable clamp for rough machining of medium-sized casting blanks has the following advantages: the adjustable clamp for rough machining of medium-sized casting blanks has a simple structure, low processing cost and flexible use, supports the medium-sized casting blank by the position-adjustable jack, and limits the degrees of freedom of the medium-sized casting blank by the pressing plate, the first side top screw and the second side top screw, so that reliable clamping of the medium-sized casting blank during rough machining can be realized, the production efficiency of rough machining of the medium-sized casting blank can be improved, and the labor intensity of personnel can be reduced. The adjustable clamp can maintain good rigidity and good universality, and is suitable for machining various medium-sized casting blank parts within a certain size range. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is an appearance schematic view of the adjustable clamp in the embodiment;

[0014] Figure 2 It is an appearance schematic view of the base in the embodiment;

[0015] Figure 3 It is a front view schematic view of the support seat in the embodiment;

[0016] Figure 4 This is a schematic diagram showing the usage state of the adjustable clamp in the embodiment;

[0017] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0018] The specific reference numerals in the figure are as follows:

[0019] 1-Clamping unit, 2-Base, 21-T-slot, 22-First threaded hole, 23-Second threaded hole, 24-First keyway, 25-First screw, 26-Counterhole, 27-Third keyway, 3-Jack, 31-Support seat, 32-Oval hole, 33-Locking screw, 34-Third T-block, 4-Pressure plate, 41-Elongated hole, 42-Screw, 43-Nut, 44-First T-block, 45-Guide rod, 46-Guide sleeve, 5-First side top plate, 51-First side top screw, 52-Second keyway, 53-Second screw, 6-Second side top plate, 61-Second side top screw, 7-Blank. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Components or structures not limited in this invention employ conventional techniques in the art.

[0021] The embodiment of the general-purpose adjustable fixture for rough machining of medium-sized casting blanks, such as Figures 1-3 As shown, the device includes two clamping units 1 spaced apart on the left and right. Each clamping unit 1 includes a base 2 and two clamping mechanisms mounted on the base 2 at a distance from front to back. Each clamping mechanism includes a jack 3, a pressure plate 4, and a first side top plate 5. The mounting positions of the jack 3 and the pressure plate 4 on the base 2 are adjustable, and the height of the pressure plate 4 is adjustable. The jack 3 is used to support the medium-sized casting blank to be clamped, and the pressure plate 4 is used to press the medium-sized casting blank downwards. The mounting position of the first side top plate 5 of one of the clamping mechanisms on the base 2 is adjustable. The first side top plates 5 of the two clamping mechanisms are respectively equipped with first side top screws 51. The first side top screws 51 of the two clamping mechanisms are used to clamp the medium-sized casting blank from front to back. At least one clamping unit 1 has a second side top plate 6 mounted on the left or right side of the base 2. The second side top plate 6 is equipped with a second side top screw 61. The second side top screw 61 is used to position the end face of the medium-sized casting blank.

[0022] In this embodiment, specifically, the pressure plate 4 has an elongated hole 41, and a screw 42 is vertically inserted into the elongated hole 41. The upper part of the screw 42 is locked and fixed to the pressure plate 4 by a nut 43. The bottom of the screw 42 is threadedly connected to a first T-shaped block 44. One end of the pressure plate 4 is fixed with a guide rod 45, which is arranged parallel to the screw 42. A guide sleeve 46 is sleeved on the outside of the guide rod 45, and the bottom of the guide sleeve 46 is threadedly connected to a second T-shaped block (not shown in the figure). The upper part of the base 2 has a T-shaped groove 21 that is open at the front and back. The first T-shaped block 44 and the second T-shaped block are respectively arranged in the T-shaped groove 21. The bottom of the jack 3 is fixed with a support seat 31. The front and rear sides of the support seat 31 are respectively provided with waist-shaped holes 32 with notches. A locking screw 33 is vertically inserted into the waist-shaped hole 32. The lower side of the locking screw 33 is threadedly connected to a third T-shaped block 34, which is arranged in the T-shaped groove 21.

[0023] In a specific implementation, the upper part of the base 2 is provided with a plurality of first threaded holes 22, four second threaded holes 23 and a first keyway 24. The first side top plate 5 of one clamping mechanism is fixed to the base 2 by a plurality of first screws 25 as the movable side. Each first screw 25 is installed in a first threaded hole 22. The number of first threaded holes 22 is greater than the number of first screws 25. The bottom of the first side top plate 5 of the other clamping mechanism is provided with a second keyway 52 and the first side top plate 5 is fixed to the base 2 by a plurality of second screws 53 and positioned by a first key block (not shown in the figure). As the fixed side, each second screw 53 is installed in a second threaded hole 23. The first key block is installed in the first keyway 24 and the second keyway 52. ​​The base 2 is provided with a plurality of countersunk holes 26 and the bottom of the base 2 is provided with a third keyway 27. The base 2 is fixed to the machine tool table (not shown in the figure) by a plurality of third screws (not shown in the figure) and positioned by a second key block (not shown in the figure). Each third screw is installed in a countersunk hole 26 and the second key block is installed in the third keyway 27 and the reference T-slot on the machine tool table.

[0024] Using a blank 7 of a certain ram as the clamping object, the above-mentioned adjustable clamp is used for rough machining clamping, such as... Figure 4 and Figure 5As shown, the clamping process is as follows: 1) Determine the distance between the two bases 2 of the two clamping units 1 according to the clamping position of the blank 7, and fix the two bases 2 to the appropriate position on the machine tool worktable using the third screw and the second key block; 2) For the two clamping mechanisms of each clamping unit 1, adjust the position of the adjustable first side top plate 5 (i.e., the movable side first side top plate 5) on the base 2 by adjusting the position of several first screws 25, and adjust the position of the jack 3 and the pressure plate 4 on the base 2; 3) Hoist the blank 7 to the adjustable fixture, and while ensuring that the parts do not interfere with each other, slowly lower the blank 7, install the first side top screw 51 and the second side top screw 61, and adjust and ensure that the blank 7 is in close contact with the machine tool worktable. After the first side top screw 51 and the second side top screw 61 on the first side top plate 5 (i.e., the fixed side first side top plate 5) are in full contact, adjust the first side top screw 51 on the movable side first side top plate 5 to make full contact with the blank 7; 4) Adjust the height of the jack 3 and the pressure plate 4, support the blank 7 with the jack 3 and press the blank 7 down with the pressure plate 4; 5) Use a dial indicator to roughly align the top surface of the blank 7 to be processed, and adjust the height with the jack 3 during the process; 6) After the alignment is completed, lock the pressure plate 4, adjust the position of the first side top screw 51 on the movable side first side top plate 5, and clamp the blank 7 with the first side top screw 51 on the front and rear sides of the blank 7, thus completing the clamping of the blank 7.

[0025] The aforementioned adjustable fixture features a simple structure, low processing cost, and flexible use. Its adjustment is convenient and quick, enabling reliable clamping of medium-sized casting blanks during rough machining. While ensuring machining stability, it improves the production efficiency of rough machining of medium-sized casting blanks and reduces labor intensity. Simultaneously, this adjustable fixture maintains good rigidity, has good versatility, and reliable clamping, making it suitable for machining various medium-sized casting blanks within a certain size range. In the case of large-volume rough machining of the same parts, clamping and adjustment time is short, and clamping efficiency is high.

Claims

1. A universal adjustable fixture for rough machining of medium-sized casting blanks, characterized in that, The device includes two clamping units spaced apart on the left and right. Each clamping unit includes a base and two clamping mechanisms mounted on the base at a distance from front to back. Each clamping mechanism includes a jack, a pressure plate, and a first side top plate. The mounting positions of the jack and the pressure plate on the base are adjustable, and the height of the pressure plate is adjustable. The jack is used to support the medium-sized casting blank to be clamped, and the pressure plate is used to press the medium-sized casting blank downwards. The mounting position of the first side top plate of one of the clamping mechanisms on the base is adjustable. The first side top plates of the two clamping mechanisms are respectively equipped with first side top screws, which are used to clamp the medium-sized casting blank from front to back. At least one clamping unit has a second side top plate mounted on the left or right side of the base, and a second side top screw is mounted on the second side top plate. The second side top screw is used to position the end face of the medium-sized casting blank.

2. The universal adjustable fixture for rough machining of medium-sized casting blanks according to claim 1, characterized in that, The pressure plate has an elongated hole, through which a screw rod is vertically inserted. The upper part of the screw rod is locked to the pressure plate by a nut. A first T-shaped block is threaded to the bottom of the screw rod. A guide rod is fixed to one end of the pressure plate. The guide rod is arranged parallel to the screw rod. A guide sleeve is fitted on the outside of the guide rod. A second T-shaped block is threaded to the bottom of the guide sleeve. A T-shaped groove with front and rear conduction is opened on the upper part of the base. The first T-shaped block and the second T-shaped block are respectively arranged in the T-shaped groove.

3. The universal adjustable fixture for rough machining of medium-sized casting blanks according to claim 2, characterized in that, The bottom of the jack is fixed with a support base. The front and rear sides of the support base are respectively provided with waist-shaped holes with notches. A locking screw is vertically inserted into the waist-shaped hole. The lower side of the locking screw is threaded with a third T-shaped block, which is set in the T-shaped groove.

4. The universal adjustable fixture for rough machining of medium-sized casting blanks according to claim 3, characterized in that, The upper part of the base is provided with a plurality of first threaded holes, a plurality of second threaded holes and a first keyway. The first side top plate of one of the clamping mechanisms is fixed to the base by a plurality of first screws, each of the first screws being installed in one of the first threaded holes. The number of first threaded holes is greater than the number of first screws. The bottom of the first side top plate of the other clamping mechanism is provided with a second keyway and the first side top plate is fixed to the base by a plurality of second screws and positioned by a first key block. Each of the second screws is installed in one of the second threaded holes. The first key block is installed in the first keyway and the second keyway.

5. The universal adjustable fixture for rough machining of medium-sized casting blanks according to claim 1, characterized in that, The base has several countersunk holes, and the bottom of the base has a third keyway. The base is fixed to the machine tool table by several third screws and positioned by a second key block. Each third screw is installed in one of the countersunk holes, and the second key block is installed in the third keyway and the reference T-slot on the machine tool table.

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