CN204308055U - A kind of U-shaped workpiece Bending Mould - Google Patents

Abstract

The utility model discloses a U-shaped workpiece bending die, which belongs to the field of bending machines and solves the problem that the existing bending dies cannot produce U-shaped workpieces with different arc end radii at high speed and high quality. The utility model comprises an upper mold and a lower mold, the upper mold includes the clamping part of the upper mold, the upper mold body and the upper mold cutter head, the lower mold includes the lower mold base and the lower mold forming block; connection; the upper surface of the lower mold base is provided with grooves; the number of lower mold forming blocks is two, which are symmetrically installed on both sides of the groove on the upper surface of the lower mold base; between the inner wall of the groove and the lower mold forming blocks An adjusting pad is also provided; an arc-shaped groove is arranged on the inner side of the upper surface of each lower mold forming block, and a workpiece auxiliary column is arranged in the arc-shaped groove. The utility model is safe and reliable, and its mold can be adapted to produce U-shaped workpieces with different arc end radii, and has high production speed and high product quality.

Description

A U-shaped workpiece bending die

technical field

The utility model belongs to the field of bending machines, in particular to a U-shaped workpiece bending die.

Background technique

The U-shaped workpiece is one of the workpieces that are often bent and processed by the bending machine. Because the radius of the arc end of various U-shaped workpieces is different, the demand is large, and the quality requirements are getting higher and higher, which has brought a lot to the processing and production. In order to relieve production pressure and keep up with the pace of production, there is an urgent need for a U-shaped workpiece processing method that can quickly, safely and high-quality produce U-shaped workpieces with different radii.

Chinese Patent No. 201220055907.4, a patent document with a publication date of September 19, 2012, discloses a lower die of a bending machine with an adjustable opening, which belongs to the field of bending machine dies. The lower mold of the opening adjustable bending machine includes the main body of the lower mold and the second fillet module. The upper surface of the main body of the lower mold has a groove; the two sides of the groove have a screw hole and a rectangular concave hole respectively. Groove, the direction of screw hole one is perpendicular to the vertical surface of the groove; there is screw hole two at the described rectangular groove, and the direction of screw hole two is perpendicular to the vertical surface of the rectangular groove; the second rounded corner The module is fixed at the rectangular groove by fastening screws 2, and the surface shape of the second rounded module is the same as that of the rectangular groove at the contact surface of the second rounded corner module and the rectangular groove. The groove width of the utility model can be adjusted, and different materials and heat treatment processes can be used for the module and the mold body. The utility model has the advantages of convenient operation, low manufacturing cost, resource saving, simple structure, reasonable design, and easy manufacture. But when this utility model processes U-shaped workpieces, the quality of the workpieces is not high, and the parallelism on both sides of the U-shaped workpieces and the accuracy of the arc ends cannot have reliable guarantees, and the high-quality requirements cannot be reached.

Chinese patent application number 201310348574.3, the patent application document published on December 4, 2013, discloses a curved workpiece processing mold, including a mold base, a die and a punch, and the punch includes a bending punch and a cutting punch die, the punch is located directly above the die, the die is installed on the die base, the die is provided with a ejector rod inside, and the top of the ejector rod is connected to a discharge block, the A beating rod and a discharge rod are sequentially arranged in the bending punch from top to bottom, and the cutting punch is arranged below the discharge rod. The arc-shaped workpiece processing mold of the invention adds a cutting punch on the basis of the usual bending punch, so that in the work, the workpiece can be bent into a complete U shape through the concave die and the bending punch, and then the workpiece can be bent into a U shape by cutting the punch. The middle part of the U-shaped workpiece is die-cut, so that two half-U-shaped workpieces can be completed at the same time, which not only improves work efficiency but also saves the calibration procedure, reduces labor intensity and saves production costs. However, this invention can only process U-shaped workpieces with a fixed radius at the arc end, and has a narrow application range, and cannot simultaneously meet the requirements of U-shaped workpieces with multiple arc end radii.

Comparing the existing technology, it can be seen that it is difficult to find a production method that not only satisfies the production of U-shaped workpieces with different arc end radii, but also can ensure the quality and speed well, thereby bringing more benefits to the further expanded production of U-shaped workpieces. got in the way.

Contents of the invention

1. Problems to be solved

Aiming at the problem that the existing bending machine mold cannot simultaneously produce U-shaped workpieces with different arc end radii, the utility model provides a U-shaped workpiece bending die. The utility model is safe and reliable, and can adapt to the production of different arc end radii The unique U-shaped workpiece greatly speeds up the production of U-shaped workpieces with different arc end radii, and the produced products are of high quality.

2. Technical solution

In order to solve the above problems, the utility model adopts the following technical solutions.

A U-shaped workpiece bending mold, comprising an upper mold and a lower mold, the upper mold includes an upper mold clamping part, an upper mold body and an upper mold cutter head, and the lower mold includes a lower mold base and a lower mold forming block; the upper die cutter head is connected with the upper die body by bolts, and the bottom surface of the upper die cutter head is U-shaped; the upper surface of the lower die base is provided with grooves; the lower die forming block The number is two, which are symmetrically installed on both sides of the groove on the upper surface of the lower mold base; an adjustment pad is also provided between the inner wall of the groove and the molding block of the lower mold; each of the lower molds is formed The inner side of the upper surface of the block is provided with an arc-shaped groove, and a workpiece-assisting column is arranged in the arc-shaped groove; the cross-section of the workpiece-assisting column is a crescent shape.

Preferably, there are 2 bolts for fixing the cutter head of the upper die; and the number of adjusting pads is 2-10.

Preferably, bolts are provided on both sides of the lower mold base; the bolts pass through the lower mold base, the adjusting cushion block and the lower mold forming block in sequence.

Preferably, the middle part of the adjustment pad is provided with a U-shaped notch with an opening facing the horizontal direction; the U-shaped notch corresponds to the positions of the bolts that pass through the lower mold base, the adjustment pad and the lower mold forming block in sequence .

Preferably, the thickness of the adjusting block is 5-15mm.

Preferably, the workpiece assisting column includes a notched surface, a notched arc surface and an outer circular surface; the radius of the notched arc surface is 1.2 times the radius of the outer circular surface.

Preferably, the material of the workpiece auxiliary column is polyurethane.

3. Beneficial effects

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

(1) The utility model comprises an upper mold and a lower mold. The upper mold includes an upper mold clamping part, an upper mold body and an upper mold cutter head, and the lower mold includes a lower mold base and a lower mold forming block; The upper mold body is connected, and the bottom surface of the upper mold cutter head is U-shaped, which is connected by bolts to facilitate the replacement and maintenance of the upper mold cutter head, so that the precision of the bottom surface of the upper mold cutter head always meets the accuracy requirements of the workpiece; the upper surface of the lower mold base There are grooves; there are two molding blocks of the lower mold, which are respectively symmetrically installed on both sides of the groove on the upper surface of the lower mold base; an adjustment pad is also provided between the inner wall of the groove and the molding blocks of the lower mold to adjust The spacer plays an important role in adjusting the opening distance between the two lower mold forming blocks, and is the key to the mold being suitable for processing U-shaped workpieces with different arc end radii; the inner side of the upper surface of each lower mold forming block is provided There is a circular arc groove, and a workpiece auxiliary column is arranged in the circular arc groove; the cross section of the workpiece auxiliary column is a crescent shape, and the workpiece auxiliary column can reduce the friction between the workpiece to be processed and the mold. To improve the precision of the workpiece, the winding moon-shaped workpiece auxiliary column has a buffering effect, which can better protect the surface of the workpiece from damage;

(2) The utility model has 2 bolts for fixing the upper die cutter head, which can ensure that the upper die cutter head is fixed firmly and saves materials; the number of adjusting pads is 2-10, and the thickness of the adjusting pads is 5- 15mm, the mold can be installed according to the radius of the arc end of the workpiece in different numbers and thicknesses, and is suitable for processing U-shaped workpieces with different arc end radii;

(3) Both sides of the lower die base of the utility model are provided with bolts; the bolts pass through the lower die base, the adjustment cushion block and the lower die forming block in turn, and are connected by bolts to facilitate the adjustment of the distance between the two lower die forming blocks ;

(4) The middle part of the adjustment pad of the utility model is provided with a U-shaped notch with an opening facing the horizontal direction; the U-shaped notch is corresponding to the positions of the bolts passing through the lower mold base, the adjustment pad and the lower mold forming block successively, replacing, It is not necessary to completely remove the bolts to install the adjusting pad, just loosen the bolts, and the adjusting pad can be easily taken out, saving the replacement time;

(5) The workpiece auxiliary column of the utility model includes a notch surface, a notch arc surface and an outer circular surface; the radius of the notch arc surface is 1.2 times the radius of the outer circular surface, ensuring that the workpiece auxiliary column has the best buffering effect on the workpiece to be processed. good;

(6) The material of the workpiece auxiliary column of the utility model is polyurethane, which has moderate hardness and has a certain buffer effect when the pressure applied by the bending machine to the workpiece is too large, so as to better protect the surface of the workpiece from damage;

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic cross-sectional view of the workpiece auxiliary column of the present invention;

Fig. 3 is a side view of the upper mold of the utility model;

Figure 4 is a schematic diagram of the method of use of the utility model.

In the figure: 1. The clamping part of the upper mold; 2. The body of the upper mold; 3. The cutter head of the upper mold; 4. The base of the lower mold; 5. The forming block of the lower mold; 8. Notched surface; 9. Notched arc surface; 10. Outer circular surface.

Detailed ways

The utility model is further described below in conjunction with specific embodiments.

Example 1

As shown in Figure 1, Figure 2 and Figure 3, a U-shaped workpiece bending mold includes an upper mold and a lower mold. The upper mold includes an upper mold clamping part 1, an upper mold body 2 and an upper mold cutter head 3. The mold includes a lower mold base 4 and a lower mold forming block 5; the upper mold cutter head 3 is connected with the upper mold body 2 by two bolts, and the bottom surface of the upper mold cutter head 3 is U-shaped; the upper surface of the lower mold base 4 is provided with Groove; the number of the lower mold forming block 5 is two, which are respectively symmetrically installed on both sides of the groove on the upper surface of the lower mold base 4; an adjustment pad 6 is also provided between the inner wall of the groove and the lower mold forming block 5 , the number of adjusting pads 6 is 10, including two with a thickness of 5mm, two with a thickness of 6mm, two with a thickness of 7mm, two with a thickness of 8mm, and two with a thickness of 9mm. The middle part is provided with a U-shaped notch with an opening facing the horizontal direction; bolts are provided on both sides of the lower mold base 4; The inner side of the upper surface of the lower mold forming block 5 is provided with an arc-shaped groove, and a workpiece auxiliary column 7 is arranged in the arc-shaped groove; the material of the workpiece auxiliary column 7 is polyurethane, and the workpiece auxiliary column 7 The cross section is crescent-shaped, and the workpiece auxiliary column 7 includes a notch surface 8, a notch arc surface 9 and an outer circular surface 10; the radius of the outer circular surface 10 is 20mm, and the radius of the notch arc surface 9 is 24mm.

A method for using a U-shaped workpiece bending die in this embodiment includes the following steps:

A. Install the mold, fix the lower mold base 4 on the mold base of the bending machine, and fix it with bolts;

B. The radius of the arc end of the U-shaped workpiece to be processed is 51mm, and the distance between the lower mold forming blocks 5 is 150mm when the adjusting pad 6 is not installed, then by selecting two thicknesses of 9mm, two thicknesses of 8mm and Two adjustment spacers 6 with a thickness of 7mm are used to adjust the distance between the two lower mold forming blocks 5 to be 102mm;

C. adjust the angle of the workpiece auxiliary column 7, so that the notch surfaces 8 of the two workpiece auxiliary columns 7 are opposite, and the angle between the notch surface 8 and the direction of gravity is 45 °;

D. Install the upper mold, select the upper mold cutter head 3 with a U-shaped bottom surface radius of 51 mm, fasten it to the upper mold body 2 with bolts, and fix the upper mold clamping part 1 on the upper mold clamp of the bending machine in the tightening device;

E. Align the upper mold with the opening between the two lower mold molding blocks 5, place the workpiece to be processed on the upper surface of the lower mold, and let the workpiece contact the workpiece auxiliary column 7;

F. The upper mold drops rapidly under the power of the bending machine until the upper mold cutter head 3 touches the workpiece, and the upper mold cutter head 3 starts to work and bend the workpiece;

G. With the advance of the upper die cutter head 3, the workpiece slowly becomes U-shaped until the notch surface 8 of the workpiece auxiliary column 7 rotates 48° relative to the direction of gravity, stop the advance and keep the pressure for 30 seconds;

H. Quickly return the upper mold, and the U-shaped workpiece is processed.

In order to solve the problem of life, a kind of manufacturing method of the upper mold cutter head of U-shaped workpiece bending mold in the present embodiment, its steps are:

1) Raw material preparation: The composition and weight percentage of the material used in the upper die cutter head are: C: 0.51%, Si: 0.16%, Mn: 2.1%, Cr: 1.30%; S≤0.03%, P≤0.03%, The rest is Fe;

2) Heat treatment: the forging blank in step 1) is annealed, that is, heated to 785 ° C, kept for 2.5 hours, and air-cooled;

3) Preliminary processing: Preliminarily process the forging blank after the preheating treatment in step 2) into the overall shape of the upper die cutter head with a planer;

4) Quenching and tempering treatment: heat the upper mold cutter head after the initial processing in step 3) to a temperature of 865° C., keep it warm for 1.5 hours, and quench it. The quenching solution is used for quenching. The composition and weight percentage of the quenching solution are: triethanolamine: 4%, sodium benzoate: 1.1%, fosphenytoin sodium: 2.4%, sodium citrate 2.3%, the balance is water;

5) Deep processing: deep processing the upper die cutter head after the quenching treatment in step 4), fine milling the outer surface of the upper die cutter head to obtain the upper die cutter head, and the processed upper die cutter head has a large amount of dispersion strengthening effect.

The mold parts manufactured by this implementation method have stable structure, good wear resistance, and high impact strength. U-shaped workpieces with different arc end radii can be manufactured by using this mold, and the processing accuracy is high, which speeds up the production speed and saves a lot The production time greatly improves the production efficiency, and the service life is 12,000 times before the upper die cutter head needs to be replaced, and the service life is long.

Example 2

A U-shaped workpiece bending die in this implementation is the same as that in Embodiment 1, the difference is that the number of adjusting pads 6 is 2, and the thicknesses are 15mm and 9mm respectively.

The using method of a kind of U-shaped workpiece bending die in the present embodiment is the same as embodiment 1, the difference is,

Step B. The radius of the arc end of the U-shaped workpiece to be processed is 63mm, and the distance between the lower mold forming blocks 5 is 150mm when the adjusting pad 6 is not installed, then by selecting a thickness of 9mm and a thickness of 15mm to adjust Spacer 6 is used to adjust the distance between the two lower molding blocks 5 to be 126mm;

Step D. Install the upper mold, select the upper mold cutter head 3 with a U-shaped bottom surface radius of 63 mm, fasten it to the upper mold body 2 with bolts, and fix the upper mold clamping part 1 on the upper mold of the bending machine in the clamping device.

A kind of manufacturing method of the upper mold cutter head of U-shaped workpiece bending mold in the present embodiment, its steps are:

1) Raw material preparation: The composition and weight percentage of the material used in the upper die cutter head are: C: 0.48%, Si: 0.17%, Mn: 1.7%, Cr: 1.50%; S≤0.03%, P≤0.03%, The rest is Fe;

2) Heat treatment: the forging blank in step 1) is annealed, that is, heated to 770 ° C, kept for 2 hours, and air-cooled;

3) Preliminary processing: Preliminarily process the forging blank after the preheating treatment in step 2) into the overall shape of the upper die cutter head with a planer;

4) Quenching and tempering treatment: heat the upper mold cutter head after the initial processing in step 3) to a temperature of 850 ° C, keep it warm for 1 hour, and quench. The quenching is quenched with a quenching liquid. The composition and weight percentage of the quenching liquid are: triethanolamine: 3%, sodium benzoate: 1.5%, fosphenytoin sodium: 2.2%, sodium citrate 2.6%, the balance is water;

5) Deep processing: deep processing the upper die cutter head after the quenching treatment in step 4), and fine milling the outer surface of the upper die cutter head to obtain the upper die cutter head.

The mold parts manufactured by this implementation method have stable structure, good wear resistance, and high impact strength. U-shaped workpieces with different arc end radii can be manufactured by using this mold, and the processing accuracy is high, which speeds up the production speed and saves a lot The production time greatly improves the production efficiency, and the service life is 11,000 times before the upper die cutter head needs to be replaced, which has a long service life.

Example 3

A U-shaped workpiece bending die in this implementation is the same as that in Embodiment 1, the difference is that the number of adjusting pads 6 is 6, and the thickness is 15mm.

The using method of a kind of U-shaped workpiece bending die in the present embodiment is the same as embodiment 1, the difference is,

Step B. The radius of the arc end of the U-shaped workpiece to be processed is 45mm, and the distance between the lower mold forming blocks 5 is 150mm when the adjusting cushion block 6 is not installed, and the two are adjusted by installing four 15mm adjusting cushion blocks 6 The distance between each lower molding block 5 is 90mm;

Step D. Install the upper mold, select the upper mold cutter head 3 with a U-shaped bottom surface radius of 45 mm, fasten it to the upper mold body 2 with bolts, and fix the upper mold clamping part 1 on the upper mold of the bending machine in the clamping device.

A kind of manufacturing method of the upper mold cutter head of U-shaped workpiece bending mold in the present embodiment, its steps are:

1) Raw material preparation: The components and weight percentages of the materials used in the upper die cutter head are: C: 0.54%, Si: 0.14%, Mn: 2.4%, Cr: 1.00; S≤0.03%, P≤0.03%, and the rest is Fe;

2) Heat treatment: the forging blank in step 1) is annealed, that is, heated to 800°C, kept for 3 hours, and air-cooled;

3) Preliminary processing: Preliminarily process the forging blank after the preheating treatment in step 2) into the overall shape of the upper die cutter head with a planer;

4) Quenching and tempering treatment: heat the upper mold cutter head after the initial processing in step 3) to a temperature of 890° C., keep it warm for 2 hours, and quench it. The quenching solution is used for quenching. The composition and weight percentage of the quenching solution are: triethanolamine: 5%, sodium benzoate: 0.5%, fosphenytoin sodium: 2.7%, sodium citrate 1.9%, the balance is water;

5) Deep processing: deep processing the upper die cutter head after the quenching treatment in step 4), and fine milling the outer surface of the upper die cutter head to obtain the upper die cutter head.

The mold parts manufactured by this implementation method have stable structure, good wear resistance, and high impact strength. U-shaped workpieces with different arc end radii can be manufactured by using this mold, and the processing accuracy is high, which speeds up the production speed and saves a lot The production time greatly improves the production efficiency, and the service life is 11,500 times before the upper die cutter head needs to be replaced, which has a long service life.

Claims (7)

1. a U-shaped workpiece Bending Mould, comprise mold and bed die, described mold comprises patrix clamping portion (1), upper mould body (2) and patrix cutter head (3), described bed die comprises counterdie base (4) and counterdie forming blocks (5), it is characterized in that: described patrix cutter head (3) is connected with upper mould body (2) by bolt, the basal surface of patrix cutter head (3) is U-shaped; The upper surface of described counterdie base (4) is provided with groove; The quantity of described counterdie forming blocks (5) is two, is arranged on the groove both sides of the upper surface of counterdie base (4) respectively symmetrically; Also be provided with between the inwall of described groove and counterdie forming blocks (5) and regulate cushion block (6); The inner side of described each counterdie forming blocks (5) upper surface is provided with circular groove, is all provided with a workpiece power-assist post (7) in circular groove; The cross section of described workpiece power-assist post (7) is moon at the first quarter shape.

2. the U-shaped workpiece Bending Mould of one according to claim 1, is characterized in that: the bolt of described fixing patrix cutter head (3) is 2; The quantity of cushion block (6) is regulated to be 2-10.

3. the U-shaped workpiece Bending Mould of one according to claim 1, is characterized in that: the both sides of described counterdie base (4) are all provided with bolt; Described screw bolt passes counterdie base (4), adjustment cushion block (6) and counterdie forming blocks (5).

4. the U-shaped workpiece Bending Mould of one according to claim 3, is characterized in that: the middle part of described adjustment cushion block (6) is provided with the U-shaped breach of opening towards horizontal direction; Described U-shaped breach with successively through counterdie base (4), regulate the position of the bolt of cushion block (6) and counterdie forming blocks (5) corresponding.

5. the U-shaped workpiece Bending Mould of the one according to claim 1 or 3, is characterized in that: the thickness of described adjustment cushion block (6) is 5-15mm.

6. the U-shaped workpiece Bending Mould of one according to claim 1, is characterized in that: described workpiece power-assist post (7) comprises breach face (8), breach arc surface (9) and periphery (10); The radius of described breach arc surface (9) is 1.2 times of periphery (10) radius.

7. the U-shaped workpiece Bending Mould of the one according to claim 1 or 6, is characterized in that: the material of described workpiece power-assist post (7) is polyurethane.