TWM505375U - Improved structure of workpiece process clamper - Google Patents

Description

Improved structure of workpiece processing fixture

This creation is an improved structure of the workpiece processing jig, especially in the process of clamping the workpiece, which will synchronously push the workpiece downward, which can effectively prevent the workpiece from loosening in the direction of the opening of the clamp, and ensure the fixture structure of the workpiece to be firmly clamped. .

The conventionally applied to the fixture structure for clamping the workpiece on the processing machine platform is disclosed in the invention patent case of the "Workpiece Positioning Device for the Vise" of the Republic of China Patent Application No. 99137729, which is provided with a vise and a clamp. Between a workpiece, the vise has a base for placing the workpiece and a second clamp for pressing the workpiece, the workpiece positioning device comprises: a positioning block having a bottom surface, a side surface and a clamping portion, The bottom surface and the side surface are each a flat surface, and the bottom surface is disposed and flatly attached to the base, the bottom surface is slidable relative to the base, the side surface is abutted against and flatly attached to the second clamp, the side surface is opposite The second clamp slides, the clamping portion and the side surface are arranged on two sides of the positioning block, the clamping portion is provided to abut against the workpiece, so that the positioning block is clamped to the workpiece and the second Between the clamps.

The vise is a conventional clamping mechanism that uses a screw to abut the bottom of the second clamp to drive a second clamp to change the distance between a second clamp and a fixed first clamp. It can form a space for clamping the workpiece; however, in practical applications, When the second clamp is close to the first clamp clamping the workpiece, the workpiece will generate a reaction force to the second clamp, so that the second clamp will form a large deformation of the upper opening, so that it is not only easy The workpiece to be processed is moved upwards to be loosened and cannot be stably clamped. For a long time, it is easy to cause wear on the relevant parts of the second clamp, which affects the overall service life of the vice.

In view of the above-mentioned shortcomings of the fixture structure for clamping the workpiece, the creator has researched and improved the shortcomings for these shortcomings, and finally this creation has been made.

The main purpose of the present invention is to provide an improved structure of a workpiece processing jig, which simultaneously pushes the workpiece downward during the process of clamping the workpiece, thereby effectively preventing the workpiece from loosening in the direction of the opening of the jig and keeping the workpiece in place. Stable clamping state.

Another object of the present invention is to provide an improved structure of a workpiece processing jig. Since the normality of the workpiece can be maintained in a portion of the jig having a strong structure (away from the opening), the movable portion of the jig is not easily worn, and the whole can also be Maintain a long service life.

In order to achieve the above object and effect, the technical means adopted by the present invention include: an elongated base having a side portion protruding toward the two sides at the top of the base, and a plurality of positioning positions on each side portion The hole is respectively provided with a channel below the two side portions; the second clamping module, each clamping module is composed of a clamping seat and a movable clamping block, and each bottom of the clamping seat is provided with a sleeve that can be fitted to the base. The lower part of the lower part of the lower part is combined with the lower joint block on the side of each lower concave part, and the two lower joint blocks are protruded into the groove, so that the respective clamping seat can be slidable on the side of the base and can not be loosened. The combination of the two sides of the two clamping seats is respectively provided with a beveled surface extending obliquely toward the top, and a receiving groove is recessed in the top of each of the inclined surfaces, and each of the receiving grooves is provided with a parallel to the inclined Under the noodles The guiding sliding surface is further provided with an adjusting screw hole and at least a lower concave hole at the bottom of each receiving groove, each movable clamping block has a sloped surface which can slide along the inclined surface, and a vertical surface which is perpendicular to the top surface of the base a clamping surface, wherein the inclined surface is provided with a convex portion extending into the receiving groove, the convex portion is provided with an upper sliding surface parallel to the inclined surface, and corresponding to the adjusting screw hole respectively on the bottom surface of the convex portion a middle hole and an upper hole of the recessed hole, an elastic element is disposed between the upper and lower recessed holes, and another adjusting bolt is screwed into the adjusting screw hole through the intermediate hole, and the adjusting bolt is used to press the activity The clamping block is balanced with the elastic element supporting the movable clamping block, and the height position of the movable clamping block on the inclined surface can be changed to be clamped between the two clamping faces; the second blocking block is They are respectively disposed on one side of the two clamping seat away from the movable clamping block, and the two blocking blocks are respectively fixedly coupled to the side of the base.

According to the above structure, an intermediate seat is further disposed between the two clamping block modules, and two clamping faces on the two sides of the intermediate seat respectively correspond to the clamping faces of the two movable clamping blocks, and the bottom of the intermediate seat is provided with a energy sleeve. The recessed portion is disposed on the lower side of the side of the base, and the side positioning screw holes are respectively provided on the side of each of the lower recesses, and the two side positioning bolts are respectively screwed into the side positioning screw holes and protrude into the positioning holes. The intermediate seat can be formed to be non-slidable, and the lower joints are respectively combined with the lower joints, and the lower joints are protruded into the grooves, so that the intermediate seat can be formed on the side of the base. Unable to loosen the combination.

According to the above structure, each of the clamping seats is provided with at least one front screw hole on the inclined surface, and the bottom side of the movable clamping block is respectively provided with a concave notch with an opening facing downward at a portion corresponding to each of the front screw holes.

According to the above structure, the top of each of the holders is provided with a plurality of upper coupling holes penetrating downwardly on the circumference side of the accommodating recess, and a plurality of screw holes corresponding to the respective coupling holes are provided on the lower joint block, and the plurality of bolts are combined by the plurality of bolts. The lower bonding holes are screwed into the screw holes through the upper bonding holes, so that the lower bonding blocks can be combined with the clamping seats.

According to the above structure, the base is provided with a through-center screw hole at a central portion, and the intermediate seat is provided with a through-hole central hole through which a central bolt is inserted and screwed into the central screw hole. The intermediate seat is positioned at a fixed position on the base.

According to the above structure, the top side of the top of the intermediate seat is provided with a plurality of side through holes penetrating downward, and the lower joint member is provided with a plurality of screw holes corresponding to the side joint holes, and the plurality of side joint bolts are used to penetrate the side joint holes. Screwing into each of the screw holes of the lower joint enables the lower joint members to be combined with the intermediate seat.

According to the above structure, the base is respectively provided with a through fixing hole at the two end portions, and each of the fixing holes is respectively fixed by a fixing bolt to the processing platform of the processing machine.

The technical means adopted by the present invention further includes: an elongated base, the top of the base is provided with side portions protruding toward the two side sides, and a plurality of positioning holes are arranged at intervals on the side portions, under the two side portions Each side has a channel; two clamping module, each clamping module is composed of a clamping seat and a plurality of movable clamping blocks, and each clamping seat is provided with a concave portion on the bottom portion of the clamping base. The lower joints are respectively combined with the lower joints, and the two lower joint blocks are protruded into the channels, so that the clamps can form a slidable and unslungable combination on the side portions of the base. The middle side of the side of the clamping seat is respectively provided with a plurality of receiving grooves, each of the receiving grooves is provided with a lower sliding surface extending obliquely toward the top, and an adjusting screw hole is arranged at the bottom of each receiving groove. Each movable clamping block is disposed in the receiving recess and has a clamping surface that is perpendicular to the top surface of the base. Each movable clamping block is disposed on a side away from the clamping surface and is capable of sliding along the lower sliding surface. Guided slopes, and intermediate holes corresponding to the adjustment screw holes are respectively arranged on the bottom surfaces of the movable clamps for each activity An elastic element is arranged between the block and the bottom of each receiving groove, and another adjusting bolt is screwed into the corresponding adjusting screw hole through each intermediate hole, and the movable clamping block is pressed by the adjusting bolt, and the elastic element supporting the movable clamping block Keep balance and change Adjusting the height position of each movable clamping block on the lower sliding surface so that the workpiece can be clamped between the opposite clamping faces; the second blocking block is respectively disposed on the second clamping seat away from the movable clamping block. The side, and the two blocks are respectively fixedly coupled to the side of the base.

In order to achieve a more specific understanding of the above objectives, effects and features of this creation, the following figures are illustrated as follows:

1‧‧‧Base

11‧‧‧ side

111‧‧‧Positioning holes

12‧‧‧ channel

13‧‧‧Fixed holes

131‧‧‧ fixing bolts

14‧‧‧Central screw hole

2, 6‧‧‧ clip seat

21, 41, 51, 61‧‧‧ recessed

22‧‧‧ accommodating grooves

221, 63, 630 ‧ ‧ lower sliding surface

222‧‧‧Adjusting screw holes

223‧‧‧ recessed hole

23, 64, 640‧‧‧ front screw holes

24‧‧‧Upper hole

241, 621‧‧‧ combined bolts

25‧‧‧Beveled noodles

26‧‧‧Flexible components

27, 62‧‧‧ under the joint block

271, 561‧‧ ‧ screw holes

3, 7, 70‧‧‧ activity blocks

31‧‧‧Slope

32‧‧‧ convex

321‧‧‧Upper sliding surface

322‧‧‧Intermediate hole

323‧‧‧Deep hole

33‧‧‧ concave gap

34, 71, 701‧‧‧ adjusting bolts

35, 72, 702‧‧ ‧ clamping faces

4‧‧‧block

42‧‧‧Intermediate screw hole

421‧‧‧Abutting bolt

43‧‧‧ side screw hole

431‧‧‧ Positioning bolt

5‧‧‧Intermediate seat

52, 521‧‧‧ side clamping faces

53‧‧‧Central hole

531‧‧‧Central bolt

54‧‧‧ side joint hole

541‧‧‧ Side joint bolt

55‧‧‧Side positioning screw hole

551‧‧‧ side positioning bolt

56‧‧‧Under the joint

73, 703‧‧‧ side gap

A, E‧‧‧Clamping module

B, C, D‧‧‧ workpieces

Fig. 1 is a perspective assembled view of the first embodiment of the present creation.

Figure 2 is an exploded perspective view of the clip module and the stopper in the first embodiment of the present invention.

Figure 3 is an exploded perspective view of the first embodiment of the present invention from the other side of the clamping module.

Fig. 4 is a plan view showing the first embodiment of the present invention when the workpiece is clamped.

Fig. 5 is a perspective assembled view of the second embodiment of the present creation.

Fig. 6 is an exploded perspective view of the intermediate seat of the second embodiment of the present invention.

Fig. 7 is a plan view showing the second embodiment of the present invention when the workpiece is clamped.

Fig. 8 is a perspective view showing the three-dimensional assembly structure of the clip module of the third embodiment of the present invention.

Referring to Figures 1 to 3, the structure of the first embodiment of the present invention includes: a base 1, a clamp module A, a stopper 4, and the like, wherein the base 1 is an elongated strip. The structure has a side portion 11 protruding toward the two sides, and a plurality of positioning holes 111 are disposed on the side portions 11 at equal intervals, and a channel 12 is respectively disposed below the two side portions 11. The two ends of the base 1 are respectively provided with a through fixing hole 13 (which can be a fisheye hole), and each fixing hole 13 can be respectively fixed by a fixing bolt 131 to the processing platform of the preset processing machine. A central screw hole 14 is provided in the center of the base 1.

The two clamping block modules A are respectively composed of a clamping seat 2 and a movable clamping block 3, and the two clamping seats 2 are respectively provided with inclined surfaces 25 extending obliquely toward the top in the middle side of the side close to each other, and the inclined surfaces of the inclined surfaces 25 are concave. The accommodating recess 22 is provided with a lower sliding surface 221 parallel to the inclined surface 25, and an adjusting screw hole 222 and two lower concave holes 223 are disposed at the bottom of each accommodating recess 22 a bottom portion of each of the holders 2 is provided with a recessed portion 21 on the side portion 11 of the base portion 1, and a lower joint portion 27 is respectively coupled to the side of each of the lower recess portions 21, and the lower joint block 27 can protrude from the groove. In the channel 12, each of the holders 2 is formed on the side portion 11 of the base 1 to form a slidable and unreleasable combination.

In a possible embodiment, the top of each of the holders 2 is provided with a plurality of upper through holes 24 (which may be fisheye holes) penetrating downwardly on the circumferential side of the accommodating recess 22, and a plurality of upper binding blocks 27 are provided Corresponding to the screw holes 271 of the upper coupling holes, the plurality of coupling bolts 241 are screwed into the screw holes 271 through the upper coupling holes 24, so that the lower coupling blocks 27 and the holders 2 can be coupled.

The movable jaws 3 respectively have a slope 31 which is slidable along the beveled surface 25, and a clamping surface 35 which is perpendicular to the top surface of the base 1. The inclined surface 31 is provided with a recess for receiving the recess. The upper portion of the convex portion 32 is provided with an upper sliding surface 321 parallel to the inclined surface 31, and the bottom surface of the convex portion 32 is provided with an intermediate hole 322 corresponding to the adjusting screw hole 222 and the lower concave hole 223, respectively. An oil element 26 is disposed between the upper and lower recessed holes 223 and 323, and an adjusting bolt 34 is inserted into the adjusting screw hole 222 through the intermediate hole 322. The movable clamping block 3 is pressed by the adjusting bolt 34 and can be balanced with the elastic member 26 supporting the movable clamping block 3, and the height position of the movable clamping block 3 on the beveled surface 25 can be changed.

In a possible embodiment, each of the holders 2 can be provided with at least one front screw hole 23 on the beveled surface 25, and a bottom side of the movable clamping block 3 is respectively provided at a portion corresponding to each of the front screw holes 23. A recessed notch 33 with the opening facing downward.

The two stoppers 4 are respectively disposed on one side of the two clamping seats 2 away from the movable clamping block 3, and a set of concave portions 41 on the bottom portion 11 of the base 1 are provided at the bottom of each of the stoppers 4, and the lower concave portions 41 are provided in the lower concave portions 41. The second side of the second side of the second side of the second screw hole 43 is inserted into the positioning hole 111, and the second block 4 and the base 1 are combined and positioned; An intermediate screw hole 42 extending along the extending direction of the base 1 is disposed on the side of the side of the block 4, and the intermediate screw hole 42 is screwed by an abutting bolt 421 and abuts against the clamping seat 2 to form a clamping seat. 2 position fine-tuning effect.

Referring to FIG. 4, it can be seen that in practical application, the workpiece B can be placed between the clamping faces 35 of the two movable clamping blocks 3, and then the adjusting bolts 34 are rotated to press the movable clamping block 3, when the two movable clamps are used. During the process of the block 3 being adjacent to each other to clamp the workpiece B, the two movable clamps 3 are also moved downward at the same time, so that the workpiece B can be pushed downward by force, so as to effectively improve the conventional workpiece B to move upwards. And the lack of looseness.

Referring to Figures 5 and 6, it can be seen that the structure of the second embodiment of the present invention is mainly provided in the foregoing first embodiment of the base 1, the clamp module A, the block 4 is further provided with an intermediate seat 5; The bottom of the intermediate seat 5 is provided with a concave portion 51 which can be sleeved on the side portion 11 of the base 1. A central hole 53 is formed in the center of the top of the intermediate seat 5, and a central bolt 53 is inserted through the central hole 53 and screwed. The intermediate screw 5 is positioned in the middle portion of the base 1; at the same time, the two side clamping faces 52, 521 are disposed on the two sides of the intermediate seat 5 respectively corresponding to the clamping of the two movable clamps 3 Face 35.

Further, the side positioning screw holes 55 which are outwardly penetrated are respectively disposed on the two sides of the lower recessed portions 51, and the two side positioning bolts 551 are respectively screwed into the side positioning screw holes 55 and protrude into the positioning holes 111, so that the intermediate seat 5 can be Positioning is formed in the middle of the base 1; and the coupling member 56 is respectively coupled to the side of each of the lower recesses 51, and the lower joint member 56 is protruded into the channel 12, so that the intermediate seat 5 can be disposed on the base 1. A more stable combination is formed on the side portion 11.

In a possible embodiment, the top side of the intermediate seat 5 is provided with a plurality of downwardly extending side coupling holes 54, and the lower coupling member 56 is provided with a plurality of screw holes 561 corresponding to the respective side coupling holes 54. The plurality of side coupling bolts 541 are screwed into the respective screw holes 561 of the lower joint member 56 through the side joint holes 54, so that the lower joint members 56 can be coupled to the intermediate seat 5.

Referring to FIG. 7, it can be seen that in practical application, the two workpieces C and D can be respectively placed between the clamping faces 52 of the two sides of the intermediate seat 5 and the clamping faces 35 of the two movable clamping blocks 3, and then Rotating the adjusting bolt 34 to press the movable clamping block 3, and similarly, when the two movable clamping blocks 3 are adjacent to each other along the beveled surface 25 to clamp the two workpieces C, D, the two movable clamping blocks 3 are simultaneously moved downward, so that The two workpieces C, D can be forced downwards to form an effective clamping position.

Referring to FIG. 8, it can be seen that the structure of the third embodiment of the present invention discloses a different clamping module E structure, and the clamping module E can cooperate with the base 1 and the stopper 4 (and the middle). The seat 5) is simultaneously implemented; wherein each of the clamping blocks E is composed of a clamping seat 6 and a plurality of movable clamping blocks 7 , and the bottom of the clamping seat 6 is provided with a recess 61 which can be fitted on the side portion 11 of the base 1 . The joint block 62 is respectively coupled to the side of each of the lower recesses 61, and the two lower joint blocks 62 are protruded into the channel 12, so that the clips 6 can be slidable on the side portion 11 of the base 1 and cannot be formed. Loose combination.

A plurality of receiving grooves are formed in a middle portion of the side of the holder 6 , and a lower sliding surface 63 , 630 extending obliquely toward the top is disposed in each of the receiving grooves, and a adjusting screw is disposed at the bottom of each receiving groove. The hole (similar to the adjustment screw hole 222 that accommodates the bottom of the groove 22).

The plurality of movable clamping blocks 7, 70 are disposed in the respective receiving recesses, and each of the movable clamping blocks 7, 70 has a clamping surface 72, 702 which is perpendicular to the top surface of the base 1 and away from the clamping surface. One side of the 72, 702 is provided with a guiding slip surface which can slide along the lower sliding surface 63, 630, and an intermediate hole (similar to the middle hole 322 of the bottom surface of the convex portion 32) is disposed on the bottom surface of each movable clamping block 7, 70. An elastic element is disposed between each of the movable clamps 7, 70 and the bottom of each of the accommodating recesses, and two adjusting bolts 71 and 701 are screwed into the corresponding adjusting screw holes through the two intermediate holes, and the adjusting bolts 71 are used. The 701 presses the two movable clamp blocks 7, 70 and balances with the elastic members supporting the movable clamp blocks 7, 70, and can change the height position of each movable clamp block 7, 70, so that the more complicated workpiece can be stably clamped. Between the clamping faces 72, 702; comprehensively, the improved structure of the workpiece processing jig can achieve stable clamping, is not easy to loose, and can reduce the wear of the relevant active parts, which is a Novelty and progressive creation, 提出 filed a new type of patent in accordance with the law; The contents, only the preferred embodiment of the present embodiment described creation, change extension under this covered the technical means and scope of Creation, modifications, changes or equivalent arthroplasty, Yi Jie fall within the scope of the patent application Creation.

1‧‧‧Base

11‧‧‧ side

111‧‧‧Positioning holes

12‧‧‧ channel

13‧‧‧Fixed holes

131‧‧‧ fixing bolts

14‧‧‧Central screw hole

2‧‧‧Clip seat

21, 41‧‧‧ recessed

24‧‧‧Upper hole

241‧‧‧ Combined bolt

26‧‧‧Flexible components

27‧‧‧Under the joint block

271‧‧‧ screw hole

3‧‧‧Active clips

31‧‧‧Slope

32‧‧‧ convex

321‧‧‧Upper sliding surface

322‧‧‧Intermediate hole

323‧‧‧Deep hole

33‧‧‧ concave gap

34‧‧‧Adjustment bolts

35‧‧‧Clamped surface

4‧‧‧block

42‧‧‧Intermediate screw hole

421‧‧‧Abutting bolt

43‧‧‧ side screw hole

431‧‧‧ Positioning bolt

Claims (8)

The improved structure of the workpiece processing jig includes at least: an elongated base, the top of the base is provided with side portions protruding toward the two side sides, and a plurality of positioning holes are arranged at intervals on the side portions, under the two side portions Each side is provided with a channel; two clamping module, each clamping module is composed of a clamping seat and a movable clamping block, and each clamping seat is provided with a concave portion on the bottom portion of the clamping base. The lower joints are respectively combined with the lower joints, and the two lower joint blocks are protruded into the channels, so that the clamps can form a slidable and unslungable combination on the side portions of the base. The middle section of the side opposite to each other is respectively provided with a beveled surface which is inclined toward the top, and a receiving groove is recessed in the top of each of the beveled surfaces, and a lower sliding surface parallel to the inclined surface is disposed in each of the receiving recesses. And an adjusting screw hole and at least one lower hole are arranged at the bottom of each receiving groove, each movable clamping block has a sloped surface which can slide along the inclined surface, and a clamping surface which is perpendicular to the top surface of the base a convex portion extending into the receiving groove is disposed on the inclined surface, and the convex portion is provided The upper sliding surface of the inclined surface is disposed, and the bottom surface of the convex portion is provided with an intermediate hole corresponding to the adjusting screw hole and the lower concave hole, and an upper concave hole, and an elastic element is disposed between the upper and lower concave holes, and An adjusting bolt is screwed into the adjusting screw hole through the intermediate hole, and the movable clamping block is pressed by the adjusting bolt, and is balanced with the elastic member supporting the movable clamping block, and the movable clamping block can be changed and adjusted on the inclined surface. a height position such that the workpiece is clamped between the two clamping faces; the second blocking block is respectively disposed on a side of the second clamping seat away from the movable clamping block, and the two blocking blocks are respectively fixedly coupled to the base On the side. The improved structure of the workpiece processing jig according to claim 1, wherein the two clamping blocks are further provided with an intermediate seat, and the two sides of the intermediate seat are provided with two side clamping faces respectively corresponding to two a clamping surface of the movable clamping block, the bottom of the intermediate seat is provided with a concave portion which can be sleeved on the side of the base, and the side of each of the lower concave portions is respectively provided with an outwardly-facing side positioning screw hole, by two sides The positioning bolts are respectively screwed into the side positioning screw holes and protrude into the positioning holes, so that the intermediate seat can be formed into an unslidable position, and the lower joints are respectively combined with the lower joints, and the lower joint members are protruded into the channel. Inside, the intermediate seat can form a combination that cannot be released on the side of the base. The improved structure of the workpiece processing jig according to the first aspect of the invention, wherein each of the clamping seats is provided with at least one front screw hole on the inclined surface, and the bottom side of the movable clamping block is respectively disposed at a portion corresponding to each front screw hole. There is a concave notch with the opening facing down. The improved structure of the workpiece processing jig according to the first aspect of the invention, wherein the top of each of the holders is provided with a plurality of upper coupling holes penetrating downwardly on the circumference side of the receiving groove, and a plurality of corresponding holes are arranged on the lower bonding block. The screw holes of the upper bonding holes are screwed into the screw holes through the upper bonding holes through the plurality of coupling bolts, so that the lower bonding blocks can be combined with the clamping seats. The improved structure of the workpiece processing jig according to the second aspect of the invention, wherein the base is provided with a through-center screw hole at a central portion, and the intermediate seat is provided with a through-hole central hole through which a central bolt is inserted The central bore is threaded into the central threaded bore to position the intermediate seat in a fixed position on the base. The improved structure of the workpiece processing jig according to the second aspect of the invention, wherein the top side of the middle seat is provided with a plurality of side joint holes penetrating downward, and the lower joint member is provided with a plurality of corresponding side holes. The screw holes are screwed into the screw holes of the lower joint through the side joint bolts through the side joint bolts, so that the lower joint members and the intermediate seat can be combined. The improved structure of the workpiece processing jig according to the first aspect of the invention, wherein the base is respectively provided with a through fixing hole at the two end portions, and each fixing hole is respectively fixed by a fixing bolt. It is set on the processing platform of the processing machine. The improved structure of the workpiece processing jig includes at least: an elongated base, the top of the base is provided with side portions protruding toward the two side sides, and a plurality of positioning holes are arranged at intervals on the side portions, under the two side portions Each side has a channel; two clamping module, each clamping module is composed of a clamping seat and a plurality of movable clamping blocks, and each clamping seat is provided with a concave portion on the bottom portion of the clamping base. The lower joints are respectively combined with the lower joints, and the two lower joint blocks are protruded into the channels, so that the clamps can form a slidable and unslungable combination on the side portions of the base. The middle side of the side of the clamping seat is respectively provided with a plurality of receiving grooves, each of the receiving grooves is provided with a lower sliding surface extending obliquely toward the top, and an adjusting screw hole is arranged at the bottom of each receiving groove. Each movable clamping block is disposed in the receiving recess and has a clamping surface that is perpendicular to the top surface of the base. Each movable clamping block is disposed on a side away from the clamping surface and is capable of sliding along the lower sliding surface. a guiding slip surface, and a bottom hole corresponding to the adjusting screw hole respectively is arranged on the bottom surface of each movable clamping block, An elastic element is arranged between each movable clamping block and the bottom of each receiving groove, and another adjusting bolt is screwed into the corresponding adjusting screw hole through each intermediate hole, and the movable clamping block is pressed by the adjusting bolt, and the movable clamping block is supported. The elastic elements are balanced, and the height position of each movable clamping block on the lower sliding surface can be changed so that the workpiece can be clamped between the opposite clamping surfaces; the second blocking block is respectively disposed on the two clamping members. The seat is away from the side of the movable clamp, and the two stops are respectively fixedly coupled to the side of the base.